Adding and Subtracting Decimals

Grade 5 · Decimals · Page 1 of 2

Name Date
DIRECTIONS: Rewrite each in columns with the points lined up, then work it out.
3.5 + 12.75: write 3.5 as 3.50 so tenths sit under tenths.
Part A — Add.
1.
13.68 + 3.9 =
2.
36.91 + 1.6 =
3.
37.61 + 16.5 =
4.
3.68 + 5.1 =
5.
33.31 + 7.8 =
6.
15.42 + 20.1 =
7.
18.10 + 16.6 =
8.
3.14 + 16.5 =

Adding and Subtracting Decimals — continued

Grade 5 · Decimals · Page 2 of 2

Part B — Subtract.
9.
66.68 − 17.9 =
10.
85.48 − 6.2 =
11.
29.90 − 7.2 =
12.
39.01 − 4.6 =
13.
21.06 − 6.3 =
14.
70.84 − 17.4 =
Part C — Use it.
  1. A store bill comes to $12.40 and you pay with a $20 bill. How much change? Show how you worked it out.
  2. Sam adds 6.3 and 0.47 and gets 6.77. Is he right? Estimate first, then work it out exactly, then say which of the two told you more.