Estimating Sum and Difference of Decimals

Estimate the sum.

69.9 + 22.1 =

Which difference is about 10?

• 33.2 – 28.4

• 70.9 – 58.7

• 42.5 – 16.8

• 65.7 – 65.6

Estimate the difference.

98 - 5.7 =

Estimate the sum.

9 + 1.2 =

What is the best estimate of this sum?9.91 + 12.3 = ______

• 19

• 20

• 22

Paula wants to buy 3 shirts and 2 belts. The shirts cost $16.89 each, and the belts cost $8.97 each. Paula has $45.Which of these amounts is the best estimate of how much more money Paula needs in order to buy the shirts and belts?

• $16

• $10

• $24

• $5

What is the best estimate of 0.94 + 2.66

• 2

• 3

• 4