Estimating and Modeling Decimal Sums and Differences

Which is the best estimate?

4.97 + 13.02 (Round to the nearest whole)

• 14

• 16

• 18

• 19

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

June’s lunch bill is $4.64. She pays with a $10 bill. About how much change does June receive? (Round to the nearest whole and estimate 10 - 4.64)

• $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