5th Grade Adding/Subtracting Decimals

Adding Decimals

100

92.30 + 0.32

What is 92.62

300

9.1 + 7.21

What is 16.31

400

14.005 + 135.1 + 3009.124

What is 3158.229

Subtracting Decimals

100

7.89 - 4.29

What is 3.6

300

True or False. 85.22 - 12.619 = 20.817

What is False 21.871

400

Sue subtracted 2.9 from 20.9 and got 0.81. Explain why this is not correct. What did Sue do wrong?

What is Sue lined up the numbers and not the decimal. The correct answer is 18.