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Mastering Number Rounding: A Step-by-Step Guide

Learn the simple rules for rounding numbers effectively. This guide explains how to round down if a digit is 4 or lower, and round up if it's 5 or higher. Through clear examples, you'll discover how to identify the digit to round and adjust the following digits accordingly. Practice rounding numbers to the nearest ten and hundred with various examples, and even learn how to order numbers from least to greatest. Master these skills to enhance your numerical abilities and confidence in math.

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Mastering Number Rounding: A Step-by-Step Guide

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  1. Rounding Numbers Remember: If a number is 4 or lower, round down If a number is 5 or higher round up

  2. Examples • Round 29 to the nearest ten • Underline the 2 because it is in the tens place • Put a box around the 9, the 9 is the number that you look at to figure out the rule • Since 9 is 5 or higher, you would round up • You will add one to the 2 which makes it a 3 and every number behind the underlined digit becomes a 0 • So 29 rounded to the nearest 10 is 30

  3. Examples • Round 409 to the nearest 100 • You would underline the 4 because it is in the hundreds place and put a box around the 0 • The 0 is 4 or lower so you would round down • The 4 will stay the same and every number behind it will become a 0 • So 409 rounded to the nearest hundred will be 400

  4. Examples • Round 273 to the nearest ten • You would underline the 7 because it is in the tens place and put a box around the 3 • The 2 in the hundreds place would stay the same because we are not rounding to that place value, the 3 tells us that we are rounding down so the 7 stays the same and every number behind it becomes a 0 • So 273 rounded to the nearest ten would be 270

  5. Round to the nearest 10 • 37 • 73 • 85 • 427 • 1,735

  6. Round to the nearest hundred • 166 • 551 • 309 • 249 • 4,032

  7. Round to the nearest ten • 15 • 86 • 42 • 55 • 97

  8. Round to the nearest 10 • 154 • 641 • 901 • 325 • 1,508

  9. Round to the nearest hundred • 451 • 203 • 670 • 448 • 952

  10. Round to the nearest hundred • 926 • 1,799 • 1,008 • 1,885 • 1,896

  11. Order the numbers from least to greatest • 10,276 24,324 10,129 • 452,100 327,000 516,200

  12. Order from least to greatest • 343 509 124 • 798 978 879 • 2,098 2,077 1,399

  13. Find the missing numbers in the patterns • 4, 7, 10, ____,____,____ • 12, 15, 18,____,____,____ • 3, 10, 17,____,____,____

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