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Math Flash Rounding

Math Flash Rounding. 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. Find your number. Look right next door.

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Math Flash Rounding

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  1. Math FlashRounding

  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. Use Place Value Carefully to Round! • Find the digit in the place you are • asked to round to. (tens, hundreds or • thousands) • 2. Look right next door. Look at the • number in the place to the right! • 3. If the number in the place to the right • is 4 or less “just ignore” and keep the • digit the same. • If the number in the place to the right • is 5 or more, you add 1 more to the • digit.

  5. Round this number to the nearestten. Find your number. 657 Circle the number in the tens place.

  6. Round this number to the nearestten. Look right next door. 6 5 7 Draw an arrow to the right of the number. Look at the ones place.

  7. Round this number to the nearestten. 5 or more, add one more. 6 5 7 Since 7 is more than 5 we “round up” and add one to the tens place.

  8. Round this number to the nearestten. 5 or more, add one more. 6 6 0 Change the numbers in the ones place to 0’s.

  9. The Answer 657 rounded to the nearest ten is 660

  10. Round this number to the nearestten. Find your number. 8 4 4 Circle the number in the tens place.

  11. Round this number to the nearestten. Look right next door. 8 4 4 Draw an arrow to the right of the number. Look at the ones place.

  12. Round this number to the nearestten. 4 or less, just ignore. 8 4 4 Since there is a 4 in the ones place, you “just ignore” and keep the tens number the same.

  13. Round this number to the nearestten. 4 or more, just ignore. 8 4 0 Change the numbers in the ones place to 0’s and keep the number in the tens place the same.

  14. The Answer 844 rounded to the nearest ten is 840

  15. Round this number to the nearesthundred. Find your number. 7, 2 2 1 Circle the number in the hundreds place.

  16. Round this number to the nearesthundred. Look right next door. 7, 2 2 1 Draw an arrow to the right of the number.

  17. Round this number to the nearesthundred. 4 or less, just ignore. 7, 2 2 1 Since 2 is less than 4 we do not change the 2.

  18. Round this number to the nearesthundred. 4 or less, just ignore. 7,2 0 0 Change the numbers to the right of the 2 to 0’s.

  19. The Answer 7221 rounded to the nearest hundred is 7,200

  20. Round this number to the nearestthousand. Find your number. 3 5, 3 2 7 Circle the number in the thousands place.

  21. Round this number to the nearestthousand. Look right next door. 3 5, 3 2 7 Draw an arrow to the right of the number.

  22. Round this number to the nearestthousand. 4 or less, just ignore. 3 5, 3 2 7 Since 3 is less than 4 we do not change the 5.

  23. Round this number to the nearestthousand. 4 or less, just ignore. 3 5, 0 0 0 Change the numbers to right of 5 to 0’s.

  24. The Answer 35,327 rounded to the nearest thousand is 3 5, 0 0 0

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

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

  27. 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.

  28. 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.

  29. 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.

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

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