Estimating Decimal Sums and Differences

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?

• $4

• $5

• $15

• $16

Which is the best estimate?

5.82 + 14.03

• 19

• 20

• 21

• 22

Which is the best estimate?

• 1

• 2

• 3

• 4

Which is the best estimate?

• 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?

• 10

• 20

• 90

• 40

Ada’s lunch costs $14.32. She hands the cashier $20. About how much change will Ada receive?

• $4

• $5

• $6

• $7

Last week, the Clearwater CD company had sales of $1,158.79. This week, the company had sales of $6,997.05. Which is the best estimate of the company’s total sales for both weeks?

• $6,000 (wrong)

• $7,000 (wrong)

• $8,000 (correct)

• $9,000 (wrong)