Whole Number Reasoning & Estimation

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Parent Answer & Strategy Guide

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20,000�Or close

Round 8,208 to 8,000. Round 12,099 to 12,000. �8,000 + 12,000 = 20,000

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12,000�or close

4,000�or close

0 - 100�or close

4,000�or close

2,100�or close

Anything

between

24,000 -

32,000

3,000 -�3,600

7,000�or close

40

or close

500�or close

20

5,000�or close

Round 11,622 to 11,500 or 12,000. Round 489 to 500.

12,000 - 12,500 are good answers. �

Round 12,334 to 12,000. Round 8,256 to 8,000�12,000 - 8,000 = 4,000

Round 8,098 to 8,000. Round 7,898 to 8,000. Answer should�be in range of 0-100

Round 14,232 to 14,000. Round 9,978 to 10,000. �14,000 - 10,000 is 4,000.

Round 287 to 300. 300 x 7 = 2,100

Round 59 to 60. Round 63 to 60. 60 x 60 = 3,600

Round 108 to 100. Round 72 to 70. 100 x 70 = 7,000

Think 7 x __ gets close to 291. Look at the first 2 digits in 291 (29). I know that 7 x 4 = 28. So, 7 x 40 = 280.

Think 8 x __ = 4,122. Look at the first 2 digits in 4,122 (41). �I know that 8 x 5 = 40. So 8 x 500 = 4,000

Round 61 to 60. Think 60 x ___ = 1,280. I know that 60 x 2 = 120,�So 60 x 20 = 1,200

Think 4 x ___= 19,202. Look at the first 2 digits in 19,202 (19).�I know that 4 x 5 = 20 which is close to 19.�I know that 4 x 5,000 = 20,000.

Whole Number Reasoning & Estimation

Round 2,864 to 3,000. Round 12 to 10. �3,000 x 10 = 30,000

8,208 + 12,099

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11,622 + 489

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12,334 - 8,256

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8,098 - 7,898

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14,232 - 9,978

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287 x 7

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2,864 x 12

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59 x 63

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108 x 72

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291 ÷ 7

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4,122 ÷ 8

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1,280 ÷ 61

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19,202 ÷ 4

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