Rounding Review Copyright © 2009 Kelly Mott.

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Presentation transcript:

Rounding Review Copyright © 2009 Kelly Mott

Part 1: Rounding Nearest 10 Copyright © 2009 Kelly Mott

23 Practice # 1: STEPS: Underline the place you are rounding to. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest ten: 23 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

36 Practice # 2: STEPS: Underline the place you are rounding to. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest ten: 36 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

Part 2: Rounding Nearest 100 Copyright © 2009 Kelly Mott

861 Practice # 1 STEPS: Underline the place you are rounding to. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest hundred: 861 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

528 Practice # 2 STEPS: Underline the place you are rounding to. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest hundred: 528 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

Part 3: Rounding Nearest 1000 Copyright © 2009 Kelly Mott

4,833 Practice # 1: STEPS: Underline the place you are rounding to. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest thousand: 4,833 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

6,117 Practice # 2 : STEPS: Underline the place you are rounding to. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest thousand: 6,117 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

Part 4: Rounding Nearest 10 (3 digits) Copyright © 2009 Kelly Mott

439 Practice # 1 Round to the nearest ten: STEPS: Underline the place you are rounding to. Write down the number(s) to the left of the underlined digit. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest ten: 439 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

653 Practice # 2 Round to the nearest ten: STEPS: Underline the place you are rounding to. Write down the number(s) to the left of the underlined digit. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest ten: 653 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

Part 5: Rounding Nearest 100 (4 digits) Copyright © 2009 Kelly Mott

8,633 Practice # 1: Round to the nearest hundred: STEPS: Underline the place you are rounding to. Write down the number(s) to the left of the underlined digit. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest hundred: 8,633 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

5,197 Practice # 2 : Round to the nearest hundred: STEPS: Underline the place you are rounding to. Write down the number(s) to the left of the underlined digit. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest hundred: 5,197 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

Part 6: Rounding Nearest 1000 (5 digits) Copyright © 2009 Kelly Mott

Practice # 1: 34,233 Round to the nearest thousand: STEPS: Underline the place you are rounding to. Write down the number(s) to the left of the underlined digit. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest thousand: 34,233 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

Practice # 2: 64,909 Round to the nearest thousand: STEPS: Underline the place you are rounding to. Write down the number(s) to the left of the underlined digit. Circle the number to the right. If the number to the right is 0, 1, 2, 3, or 4, then the underlined number stays the same. If the number to the right is 5, 6, 7, 8, or 9, then the underlined number needs to go up 1 more number. Every number to the right of the underlined number becomes a zero. Round to the nearest thousand: 64,909 Hint for the Circled Number: 4 or less just ignore. 5 or more, add 1 more. Copyright © 2009 Kelly Mott

Part 7: Estimating Sums (Nearest 10) Copyright © 2009 Kelly Mott

Practice # 7: Round to the nearest ten. Estimate each sum. 39 _ _ 51 _ _ 68 _ _ 17 _ _ + + + + Steps: 1. Round each to the nearest 10. 2. Then add. Copyright © 2010 Kelly Mott

Practice # 8: Round to the nearest ten. Estimate each sum. 43 _ _ 82 _ _ 71 _ _ 26 _ _ + + + + Steps: 1. Round each to the nearest 10. 2. Then add. Copyright © 2010 Kelly Mott

Part 8: Estimating Sums (Nearest 100) Copyright © 2009 Kelly Mott

Practice # 2: Round to the nearest 100. Estimate each sum. 229 _ _ _ 330 _ _ _ 450 _ _ _ 199 _ _ _ + + + + Steps: 1. Round each to the nearest 100. 2. Then add. Copyright © 2010 Kelly Mott

Practice # 3: Round to the nearest 100. Estimate each sum. 645 _ _ _ 253 _ _ _ 561 _ _ _ 131 _ _ _ + + + + Steps: 1. Round each to the nearest 100. 2. Then add. Copyright © 2010 Kelly Mott

Part 9: Estimating Differences (Nearest 10) Copyright © 2009 Kelly Mott

Practice # 2: Round to the nearest ten. Estimate the difference. 55 _ _ 13 _ _ 44 _ _ 27 _ _ - - - - Steps: 1. Round each to the nearest 10. 2. Then subtract. Copyright © 2010 Kelly Mott

Practice # 3: Round to the nearest ten. Estimate the difference. 62 _ _ 38 _ _ 78 _ _ 51 _ _ - - - - Steps: 1. Round each to the nearest 10. 2. Then subtract. Copyright © 2010 Kelly Mott

Part 10: Estimating Differences (Nearest 100) Copyright © 2009 Kelly Mott

Practice # 2: Round to the nearest 100. Estimate the difference. 766 _ _ _ 238 _ _ _ 843 _ _ _ 591 _ _ _ - - - - Steps: 1. Round each to the nearest 100. 2. Then subtract. Copyright © 2010 Kelly Mott

Practice # 3: Round to the nearest 100. Estimate the difference. 942 _ _ _ 533 _ _ _ 457 _ _ _ 152 _ _ _ - - - - Steps: 1. Round each to the nearest 100. 2. Then subtract. Copyright © 2010 Kelly Mott

Does this make sense? Copyright © 2009 Kelly Mott