Estimate Decimal Sums and Differences

Estimate the sum. 6.77 + 3.23

Estimate the difference. 5.55 – 0.25

Estimate the sum. 2.09 + 5.92

Estimate the difference. 7.36 – 0.83

Fran bought sneakers for $54.26 and a shirt for $34.34. If Fran started with $100, about how much money does she have left?

• $35

• $20

• $5

• $80

Mike spends $23.40 on a present for his mom and a $18.95 on a present for his dad. If Mike started with $75, about how much money does he have left?

• $30

• $50

• $20

• $40

Which of the following is the best estimate for the equation:

70.2-59.7

• 25

• 10

• 3

• 19

Which of the following is the best estimate for the equation:

15.9 + 12.03

• 28

• 15

• 37

• 18

Which of the following is the best estimate for the equation:

61.44 + 88.3

• 100

• 120

• 150

• 200

Estimate the sum by rounding each decimal to the nearest hundred.

428.1 + 186.5

• 500

• 600

• 700

• 800