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Math Flash Rounding

Math Flash Rounding. Objective: TLW round numbers to the nearest 10 or 100. GLE# 12. Use rounding. When the question asks you to estimate. When the question asks “about how many”…? When an exact answer isn’t possible. When an answer is difficult to obtain. Memorize this Poem.

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Math Flash Rounding

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  1. Math FlashRounding Objective: TLW round numbers to the nearest 10 or 100. GLE# 12

  2. Use rounding • When the question asks you • to estimate. • When the question asks • “about how many”…? • When an exact answer isn’t • possible. • When an answer is difficult to obtain.

  3. Memorize this Poem Find your number. Look right next door. 4 or less just ignore. 5 or more, add 1 more.

  4. Round this number to the nearesttens. Find your number. 6 8 Circle the number in the tens place.

  5. Round this number to the nearesttens. Look right next door. 6 8 Draw an arrow to the right of the number.

  6. Round this number to the nearesttens . 4 or less, just ignore. 6 8 8 is larger than 4 so go to the next line of the poem.

  7. Round this number to the nearesttens. 5 or more, add 1 more. +1 6 8 Add 1 to the 6.

  8. Round this number to the nearesttens. 5 or more, add 1 more. 70 Add 1 to the 6 and all the numbers to the right of the 7 become 0’s.

  9. The Answer 68 rounded to the nearest tens is 7 0

  10. Round this number to the nearesthundred. Find your number. 3 2 7 Circle the number in the hundreds place.

  11. Round this number to the nearesthundred. Look right next door. 3 2 7 Draw an arrow to the right of the number.

  12. Round this number to the nearesthundred. 4 or less, just ignore. 3 2 7 Since 2 is less than 4 we do not change the 3.

  13. Round this number to the nearestthousand. 4 or less, just ignore. 3 0 0 Change the numbers to right of 3 to 0’s.

  14. The Answer 327 rounded to the nearest hundred is 300

  15. Round this number to the nearestdollar. Find your number. $ 5. 87 Circle the number where the dollars are.

  16. Round this number to the nearestdollar. Look right next door. $ 5. 87 Draw an arrow to the right of the circled number.

  17. Round this number to the nearestdollar. 4 or less, just ignore. $ 5. 87 8 is greater than 4 so go to the next line of the poem.

  18. Round this number to the nearestdollar. 5 or more, add 1 more. +1 $ 5. 87 Since 8 is greater than 5 add 1 to the 5.

  19. Round this number to the nearestdollar. 5 or more, add 1 more. $ 6. 0 0 Change the 5 to a 6 and change all the numbers to the right to 0’s.

  20. The Answer $5.87 rounded to the nearest dollar is $ 6. 0 0

  21. Round this number to the nearesthundreds place. Find your number. 87 1 Circle the number in the hundreds place.

  22. Round this number to the nearesthundreds place. Look right next door. 87 1 Draw an arrow to the right of the circled number.

  23. Round this number to the nearesthundreds place. 4 or less just ignore. 87 1 7 is greater than 4 so go to the next line of the poem.

  24. Round this number to the nearesthundreds place. 5 or more, add 1 more. +1 87 1 Since 7 is greater than 5, add 1 to the 8.

  25. Round this number to the nearesthundreds place. 5 or more, add 1 more. 900 Change the 8 to a 9 and all the numbers to the right change to zeros.

  26. The Answer 871 rounded to the nearest hundreds place is 900

  27. Remember the poem • Find your number. • Look right next door. • 4 or less, just ignore. • 5 or more, add 1 more.

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