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<p>Last updated on<strong>August 5, 2025</strong></p>
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<p>Last updated on<strong>August 5, 2025</strong></p>
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<p>Roman numerals are a way of expressing numbers using symbols. I, V, X, L, C, D, and M are the symbols we use. Roman numerals are used in royal titles, book names, sequences, and so on. Here we will be discussing Roman numerals, rules, and examples.</p>
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<p>Roman numerals are a way of expressing numbers using symbols. I, V, X, L, C, D, and M are the symbols we use. Roman numerals are used in royal titles, book names, sequences, and so on. Here we will be discussing Roman numerals, rules, and examples.</p>
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<h2>What is 145 in Roman Numerals?</h2>
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<h2>What is 145 in Roman Numerals?</h2>
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<p>The royal titles, such as Henry I, Henry II, and so on, use Roman numerals. Have you noticed the names and wondered what these<a>symbols</a>(I and II) represented? Those are Roman numerals.</p>
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<p>The royal titles, such as Henry I, Henry II, and so on, use Roman numerals. Have you noticed the names and wondered what these<a>symbols</a>(I and II) represented? Those are Roman numerals.</p>
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<p>Earlier, people used fingers, sticks, bones, etc., to count. When life became complex, a<a>standard form</a>was required to count. Ancient Romans used the Roman numeral system for this purpose. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the symbols we use to count.</p>
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<p>Earlier, people used fingers, sticks, bones, etc., to count. When life became complex, a<a>standard form</a>was required to count. Ancient Romans used the Roman numeral system for this purpose. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the symbols we use to count.</p>
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<p>In Roman numerals, we use CXLV to represent 145, where C is 100, XL is 40, and V is 5. Let’s learn more about Roman numerals and how we write them. </p>
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<p>In Roman numerals, we use CXLV to represent 145, where C is 100, XL is 40, and V is 5. Let’s learn more about Roman numerals and how we write them. </p>
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<p>CXL = 100 + 40 = 140 CXLI = 100 + 40 + 1 = 141 CXLII = 100 + 40 + 2 = 142 CXLIII = 100 + 40 + 3 = 143 CXLIV = 100 + 40 + 4 = 144 CXLV = 100 + 40 + 5 = 145 </p>
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<p>CXL = 100 + 40 = 140 CXLI = 100 + 40 + 1 = 141 CXLII = 100 + 40 + 2 = 142 CXLIII = 100 + 40 + 3 = 143 CXLIV = 100 + 40 + 4 = 144 CXLV = 100 + 40 + 5 = 145 </p>
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<h2>Basic Rules for 145 in Roman Numerals</h2>
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<h2>Basic Rules for 145 in Roman Numerals</h2>
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<p>There are certain basic rules to write a<a>number</a>in Roman numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.</p>
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<p>There are certain basic rules to write a<a>number</a>in Roman numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.</p>
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<h3>Rule 1: Addition Method</h3>
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<h3>Rule 1: Addition Method</h3>
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<p>The<a>addition</a>method is used when a smaller number is placed after a larger number. For example, XV → X + V → 10 + 5 = 15.</p>
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<p>The<a>addition</a>method is used when a smaller number is placed after a larger number. For example, XV → X + V → 10 + 5 = 15.</p>
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<h3>Rule 2: Repetition Method</h3>
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<h3>Rule 2: Repetition Method</h3>
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<p>To write a larger number, certain Roman numerals can be repeated up to three times. For example, CCC → 300.</p>
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<p>To write a larger number, certain Roman numerals can be repeated up to three times. For example, CCC → 300.</p>
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<h3>Rule 3: Subtraction Method</h3>
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<h3>Rule 3: Subtraction Method</h3>
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<p>If a small number is followed by a larger number in Roman numerals, we subtract the smaller number from the larger number. For example, XL → L - X → 50 - 10 = 40.</p>
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<p>If a small number is followed by a larger number in Roman numerals, we subtract the smaller number from the larger number. For example, XL → L - X → 50 - 10 = 40.</p>
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<h3>Rule 4: Limitation Rule</h3>
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<h3>Rule 4: Limitation Rule</h3>
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<p>The symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we don't write CCCCC for 500; instead, we use D.</p>
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<p>The symbols cannot be repeated more than three times, and some symbols like V, L, and D cannot be repeated. For example, we don't write CCCCC for 500; instead, we use D.</p>
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<h2>How to Write 145 in Roman Numerals</h2>
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<h2>How to Write 145 in Roman Numerals</h2>
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<p>Let’s now learn how to write 145 in Roman numerals. Follow these methods to write the number in Roman numerals.</p>
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<p>Let’s now learn how to write 145 in Roman numerals. Follow these methods to write the number in Roman numerals.</p>
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<ul><li>By Expansion Method</li>
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<ul><li>By Expansion Method</li>
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<li>By Grouping Method </li>
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<li>By Grouping Method </li>
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<h3>145 in Roman Numerals by Expansion Method</h3>
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<h3>145 in Roman Numerals by Expansion Method</h3>
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<p>In the expansion method, based on<a>place value</a>, the number is broken down. In this section, we will learn how to write 145 in Roman numerals using the expansion method.</p>
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<p>In the expansion method, based on<a>place value</a>, the number is broken down. In this section, we will learn how to write 145 in Roman numerals using the expansion method.</p>
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<p>To write 145 in Roman numerals, follow the steps:</p>
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<p>To write 145 in Roman numerals, follow the steps:</p>
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<p><strong>Step 1:</strong>Break the number based on place value. Place values include ones, tens, hundreds, etc.</p>
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<p><strong>Step 1:</strong>Break the number based on place value. Place values include ones, tens, hundreds, etc.</p>
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<p>For 145, we write it as 100 + 40 + 5.</p>
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<p>For 145, we write it as 100 + 40 + 5.</p>
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<p><strong>Step 2:</strong>Convert the numbers into Roman numerals:</p>
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<p><strong>Step 2:</strong>Convert the numbers into Roman numerals:</p>
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<p>100 in Roman numerals - C 40 in Roman numerals - XL 5 in Roman numerals - V</p>
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<p>100 in Roman numerals - C 40 in Roman numerals - XL 5 in Roman numerals - V</p>
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<p><strong>Step 3:</strong>Combine the Roman numerals together.</p>
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<p><strong>Step 3:</strong>Combine the Roman numerals together.</p>
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<p>Therefore, 145 in Roman numerals is C (100) + XL (40) + V (5) = CXLV. </p>
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<p>Therefore, 145 in Roman numerals is C (100) + XL (40) + V (5) = CXLV. </p>
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<h3>145 in Roman Numerals by Grouping Method</h3>
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<h3>145 in Roman Numerals by Grouping Method</h3>
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<p>When writing a large number into Roman numerals, we group the number. To write 145 in Roman numerals, we group 145 as 100 + 40 + 5.</p>
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<p>When writing a large number into Roman numerals, we group the number. To write 145 in Roman numerals, we group 145 as 100 + 40 + 5.</p>
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<p>100 in Roman numerals - C</p>
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<p>100 in Roman numerals - C</p>
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<p>40 in Roman numerals - XL</p>
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<p>40 in Roman numerals - XL</p>
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<p>5 in Roman numerals - V</p>
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<p>5 in Roman numerals - V</p>
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<p>So, 145 is written as CXLV in Roman numerals. </p>
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<p>So, 145 is written as CXLV in Roman numerals. </p>
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<h2>Common Mistakes and How to Avoid Them in 145 Roman Numerals</h2>
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<h2>Common Mistakes and How to Avoid Them in 145 Roman Numerals</h2>
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<p>Students make mistakes when writing a number in Roman numerals. To master Roman numerals, we can learn a few common mistakes and the ways to avoid them. </p>
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<p>Students make mistakes when writing a number in Roman numerals. To master Roman numerals, we can learn a few common mistakes and the ways to avoid them. </p>
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<h3>Problem 1</h3>
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<h3>Problem 1</h3>
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<p>A historian finds a document stating that the population of a small village was CXXXV in the year XCV. If the population grew by X in the next year, what was the new population?</p>
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<p>A historian finds a document stating that the population of a small village was CXXXV in the year XCV. If the population grew by X in the next year, what was the new population?</p>
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<p>Okay, lets begin</p>
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<p>Okay, lets begin</p>
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<p> The new population was CXLV. </p>
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<p> The new population was CXLV. </p>
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<h3>Explanation</h3>
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<h3>Explanation</h3>
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<p>The original population is CXXXV, which is 135. </p>
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<p>The original population is CXXXV, which is 135. </p>
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<p>Increased by X, which is 10. </p>
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<p>Increased by X, which is 10. </p>
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<p>135 + 10 = 145. </p>
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<p>135 + 10 = 145. </p>
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<p>145 in Roman Numerals is CXLV. </p>
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<p>145 in Roman Numerals is CXLV. </p>
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<p>Well explained 👍</p>
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<p>Well explained 👍</p>
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<h3>Problem 2</h3>
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<h3>Problem 2</h3>
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<p>A library has DCCCXLV books and wants to distribute them equally among V pupils. How many books will each pupil receive?</p>
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<p>A library has DCCCXLV books and wants to distribute them equally among V pupils. How many books will each pupil receive?</p>
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<p>Okay, lets begin</p>
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<p>Okay, lets begin</p>
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<p>Each pupil will receive CLXIX books. </p>
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<p>Each pupil will receive CLXIX books. </p>
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<h3>Explanation</h3>
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<h3>Explanation</h3>
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<p>To find the number of books each pupil gets, divide the total number of books by the number of pupils. </p>
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<p>To find the number of books each pupil gets, divide the total number of books by the number of pupils. </p>
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<p>DCCCXLV = 845 </p>
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<p>DCCCXLV = 845 </p>
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<p>V = 5 </p>
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<p>V = 5 </p>
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<p>845 / 5 = 169 </p>
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<p>845 / 5 = 169 </p>
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<p>169 in Roman Numerals is CLXIX. </p>
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<p>169 in Roman Numerals is CLXIX. </p>
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<p>Well explained 👍</p>
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<p>Well explained 👍</p>
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<h3>Problem 3</h3>
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<h3>Problem 3</h3>
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<p>Calculate the difference between CCXLV and C in Roman numerals.</p>
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<p>Calculate the difference between CCXLV and C in Roman numerals.</p>
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<p>Okay, lets begin</p>
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<p>Okay, lets begin</p>
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<p>The difference is CXLV. </p>
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<p>The difference is CXLV. </p>
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<h3>Explanation</h3>
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<h3>Explanation</h3>
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<p>The difference between two numbers is found by subtracting one from the other. </p>
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<p>The difference between two numbers is found by subtracting one from the other. </p>
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<p>CCXLV = 245 </p>
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<p>CCXLV = 245 </p>
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<p>C = 100 </p>
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<p>C = 100 </p>
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<p>245 - 100 = 145 </p>
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<p>245 - 100 = 145 </p>
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<p>145 in Roman Numerals is CXLV. </p>
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<p>145 in Roman Numerals is CXLV. </p>
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<p>Well explained 👍</p>
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<p>Well explained 👍</p>
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<h3>Problem 4</h3>
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<h3>Problem 4</h3>
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<p>A teacher has a total of CCLXX notebooks and wants to give an equal number of notebooks to each of the XVIII students. How many notebooks will each student receive?</p>
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<p>A teacher has a total of CCLXX notebooks and wants to give an equal number of notebooks to each of the XVIII students. How many notebooks will each student receive?</p>
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<p>Okay, lets begin</p>
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<p>Okay, lets begin</p>
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<p>Each student will receive XV notebooks. </p>
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<p>Each student will receive XV notebooks. </p>
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<h3>Explanation</h3>
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<h3>Explanation</h3>
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<p>To find the number of notebooks each student receives, divide the total number of notebooks by the number of students. </p>
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<p>To find the number of notebooks each student receives, divide the total number of notebooks by the number of students. </p>
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<p>CCLXX = 270 </p>
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<p>CCLXX = 270 </p>
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<p>XVIII = 18 </p>
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<p>XVIII = 18 </p>
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<p>270 / 18 = 15 </p>
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<p>270 / 18 = 15 </p>
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<p>15 in Roman Numerals is XV. </p>
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<p>15 in Roman Numerals is XV. </p>
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<p>Well explained 👍</p>
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<p>Well explained 👍</p>
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<h3>Problem 5</h3>
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<h3>Problem 5</h3>
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<p>Write the Roman Numeral for the result of multiplying IX by XVI using the expansion method.</p>
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<p>Write the Roman Numeral for the result of multiplying IX by XVI using the expansion method.</p>
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<p>Okay, lets begin</p>
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<p>Okay, lets begin</p>
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<p> The result of IX multiplied by XVI is CXLIV. </p>
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<p> The result of IX multiplied by XVI is CXLIV. </p>
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<h3>Explanation</h3>
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<h3>Explanation</h3>
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<p>Step 1: Convert the numbers IX and XVI into Roman numerals. IX = 9 XVI = 16 </p>
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<p>Step 1: Convert the numbers IX and XVI into Roman numerals. IX = 9 XVI = 16 </p>
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<p>Step 2: Multiply the numbers: 9 × 16 = 144 </p>
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<p>Step 2: Multiply the numbers: 9 × 16 = 144 </p>
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<p>Step 3: Use the expansion method: 144 = 100 + 40 + 4 = CXLIV </p>
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<p>Step 3: Use the expansion method: 144 = 100 + 40 + 4 = CXLIV </p>
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<p>Well explained 👍</p>
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<p>Well explained 👍</p>
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<h2>FAQs on 145 in Roman Numerals</h2>
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<h2>FAQs on 145 in Roman Numerals</h2>
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<h3>1.What is 49 in Roman numerals?</h3>
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<h3>1.What is 49 in Roman numerals?</h3>
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<p>XLIX is 49, as it uses the subtraction method. That is L - X + IX, which is 50 - 10 + 9 = 49.</p>
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<p>XLIX is 49, as it uses the subtraction method. That is L - X + IX, which is 50 - 10 + 9 = 49.</p>
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<h3>2.How to write 145 in Roman numerals?</h3>
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<h3>2.How to write 145 in Roman numerals?</h3>
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<p>Here, the numbers are grouped based on place value: C (100) + XL (40) + V (5) = 145. So, CXLV is 145. </p>
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<p>Here, the numbers are grouped based on place value: C (100) + XL (40) + V (5) = 145. So, CXLV is 145. </p>
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<h3>3.What is 152 in Roman Numerals?</h3>
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<h3>3.What is 152 in Roman Numerals?</h3>
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<p>152 in Roman numerals is written as CLII.</p>
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<p>152 in Roman numerals is written as CLII.</p>
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<h3>4.Is CXLV a prime number?</h3>
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<h3>4.Is CXLV a prime number?</h3>
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<p>No, CXLV is not a<a>prime number</a>because 145 is divisible by 1, 5, 29, and 145. </p>
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<p>No, CXLV is not a<a>prime number</a>because 145 is divisible by 1, 5, 29, and 145. </p>
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<h3>5.What are the multiples of 145?</h3>
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<h3>5.What are the multiples of 145?</h3>
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<p>The<a>multiples</a>of 145 are 145, 290, 435, 580, 725, and so on. </p>
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<p>The<a>multiples</a>of 145 are 145, 290, 435, 580, 725, and so on. </p>
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<h2>Important Glossaries for 145 in Roman Numerals</h2>
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<h2>Important Glossaries for 145 in Roman Numerals</h2>
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<ul><li><strong>Addition rule:</strong>The addition method is used when a larger numeral is followed by a smaller numeral, and their values are added. For example, XV = X + V = 10 + 5 = 15.</li>
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<ul><li><strong>Addition rule:</strong>The addition method is used when a larger numeral is followed by a smaller numeral, and their values are added. For example, XV = X + V = 10 + 5 = 15.</li>
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</ul><ul><li><strong>Grouping method:</strong>Here, the given numbers are grouped based on their place value and then converted into Roman numerals. For example, 145 = 100 + 40 + 5 = CXLV.</li>
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</ul><ul><li><strong>Grouping method:</strong>Here, the given numbers are grouped based on their place value and then converted into Roman numerals. For example, 145 = 100 + 40 + 5 = CXLV.</li>
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</ul><ul><li><strong>Repetition rule:</strong>Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times. For example, CCC = 300 (C is repeated three times to represent the number 300).</li>
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</ul><ul><li><strong>Repetition rule:</strong>Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times. For example, CCC = 300 (C is repeated three times to represent the number 300).</li>
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</ul><ul><li><strong>Subtraction rule:</strong>The subtraction method is used when a smaller numeral precedes a larger one. For example, XL = L - X = 50 - 10 = 40.</li>
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</ul><ul><li><strong>Subtraction rule:</strong>The subtraction method is used when a smaller numeral precedes a larger one. For example, XL = L - X = 50 - 10 = 40.</li>
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</ul><ul><li><strong>Limitation rule:</strong>Symbols cannot be repeated more than three times, and certain symbols (V, L, D) cannot be repeated at all. </li>
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</ul><ul><li><strong>Limitation rule:</strong>Symbols cannot be repeated more than three times, and certain symbols (V, L, D) cannot be repeated at all. </li>
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</ul><p>What Are Numbers? 🔢 | Fun Explanation with 🎯 Real-Life Examples for Kids | ✨BrightCHAMPS Math</p>
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</ul><p>What Are Numbers? 🔢 | Fun Explanation with 🎯 Real-Life Examples for Kids | ✨BrightCHAMPS Math</p>
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<h2>Hiralee Lalitkumar Makwana</h2>
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<h2>Hiralee Lalitkumar Makwana</h2>
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<h3>About the Author</h3>
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<h3>About the Author</h3>
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<p>Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.</p>
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<p>Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.</p>
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<h3>Fun Fact</h3>
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<h3>Fun Fact</h3>
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<p>: She loves to read number jokes and games.</p>
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<p>: She loves to read number jokes and games.</p>