Rounding

Rounding

Estimating Sums

Estimating Differences

Sums and Differences with Pictures

Sums and Differences

100

2.25 rounded to the nearest number

What is 2

100

Estimate the sum of 7.4 + 3.7

What is 7+4=11

100

Estimate the difference of 8.2 - 5.4 =

What is 8 - 5 = 3

100

4.9 - 2.37

What is 2.53

100

5.21 + 0.99

What is 6.2

200

26.96 rounded to the nearest whole number

What is 27

200

Estimate the sum of 17.97 + 6.80

What is 18 + 7 =25

200

Estimate the difference of 12.07 - 7.23 =

What is 12 - 7 = 5

200

3.2 - 1.18

What is 2.02

200

78.35 - 2.6

What is 75.75

300

17.09 rounded to the nearest whole number

What is 17

300

Estimate the sum of 29.29 + 42.52 =

What is 29 + 43 = 72

300

Estimate the difference of 24.50 - 11.78 =

What is 25 - 12 = 13

300

2.74 + 1.67

What is 4.41

300

157.38 + 23.69

What is 181.07

400

49.7 rounded to the nearest whole number

What is 50

400

Estimate the sum of 54.07 + 26.14 =

What is 54 + 26 = 80

400

Estimate the difference of 15.06 - 4.6 =

What is 15 - 5 = 10

400

2.08 + 1.26

What is 3.34

400

13.18 + 18 + 59.78

What is 90.96

500

13.5 rounded to the nearest whole number

What is 14

500

Estimate the sum of 14.6 + 21.07 =

What is 15 + 21 = 36

500

Estimate the difference of 99.89 - 9.52 =

What is 100 - 10 = 90

500

3 - 1.4

What is 1.6

500

244 - 5.18

What is 238.82