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Rounding
Estimating Sum
Estimating Difference
Estimating Word Problems
100

Round 44 to the nearest tens

40

100

Estimate the sums

26 + 15

30 + 20 = 50

100

Estimate the difference

34 - 23

30 - 20 = 10

100

There are 5 apple trees in the park. 12 more apple tress were planted. Estimate how many apple trees are in the park.

10 + 10 = 20

200

Round 119 to the nearest tens

120

200
Estimate the sum

37 + 44

40 + 40 = 80

200

Estimate the difference

54 - 49

50 - 50 = 0

200

Mya picked 14 limes and Dan picked 18 limes. Estimate how many limes they picked together.

10 + 20 = 30

300

Round 286 to the nearest 10

290

300

Estimate the sum

7 + 88

10 + 90 = 100

300

Estimate the difference

88 - 7

90 - 10 = 80
300

Jessica is reading a book that has 75 pages. She read 43 pages. About how many pages does Jessica have left to read?

80 - 40 = 40

400

Round 454 to the nearest hundred

500

400

Estimate the sum

92 and 46

90 +50 = 140

400

Estimate the difference

92 and 46

90 - 50 = 40

400

Joe's school sold 53 boxes of doughnuts for a fundraiser. Bella's school sold 38 boxes of doughnuts. About how many boxes of doughnuts did the schools sell in all?

50 + 40 = 90

500

What two decade numbers is 73 between?

70 and 80

500

Estimate the sum

99 and 36

100 + 40 = 140

500

Estimate the difference

99 and 36

100 - 40 = 60

500
Jake has 65 Pokemon cards. Mike bought 41 of Jake's basketball cards. About how many Pokemon cards does Jake have?

65 rounds to 70