Estimating Sum and Difference of Decimals

Which is the best estimate?

9.6 - 6.2 (Round to the nearest whole)

• 16

• 15

• 4

• 3

Which is the best estimate?5.07 - 2.56 (Round to the nearest whole)

• 2

• 3

• 7

• 8

Jan’s lunch bill is $5.74. She pays with a $10 bill. About how much change does she receive? (Round to the nearest whole and estimate 10 - 5.74)

• $4

• $5

• $15

• $16

Which is the best estimate?

5.82 + 14.03 (Round to the nearest whole)

• 19

• 20

• 21

• 22

Which is the best estimate?

8.5 - 7.1 (Round to the nearest whole)

• 1

• 2

• 3

• 4

Which is the best estimate?

9.07 - 3.67 (Round to the nearest whole)

• 3

• 4

• 5

• 6

Which is the best estimate? 10.47 + 42.5 (Round to the nearest whole)

• 54

• 53

• 52

• 51

Which is the best estimate?

57.69 - 41.35 (Round to the nearest whole)

• 16

• 17

• 98

• 99

Ada’s lunch costs $14.32. She hands the cashier $20. About how much change will Ada receive? (Round to the nearest whole and estimate 20 - 14.32)

• $4

• $5

• $6

• $7

Which is the best estimate?

11.36 + 52.6 (Round to the nearest whole)

• 42

• 63

• 64

• 65