Addition and subtraction of decimals on the same page, so students check the sign and line up the decimal points every time. This mixed practice is a 5th grade skill and a quick review in 6th and 7th grade.
Grades 5–7
Common Core 5.NBT.B.7, 6.NS.B.3
Answer key included
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NameDate
Adding and Subtracting Decimals
Score / 20
Look at each sign. Line up the decimal points.
1.68.5+84.9
2.38.8−4.86
3.80.83+40.93
4.58.3+28.42
5.38.37+39.9
6.27.1+13.28
7.79.3−12.8
8.43.2+52.38
9.32.9+8.53
10.5.7+2.64
11.68.7−58.15
12.92.3−86.71
13.97.78−27.5
14.70.42−25.67
15.74.8−61.7
16.71.4−60.88
17.91.54−15.61
18.90.9+92.54
19.14.9−8.85
20.30.4+30.33
Answer keyAdding and Subtracting Decimals
Look at each sign. Line up the decimal points.
1.68.5+84.9153.4
2.38.8−4.8633.94
3.80.83+40.93121.76
4.58.3+28.4286.72
5.38.37+39.978.27
6.27.1+13.2840.38
7.79.3−12.866.5
8.43.2+52.3895.58
9.32.9+8.5341.43
10.5.7+2.648.34
11.68.7−58.1510.55
12.92.3−86.715.59
13.97.78−27.570.28
14.70.42−25.6744.75
15.74.8−61.713.1
16.71.4−60.8810.52
17.91.54−15.6175.93
18.90.9+92.54183.44
19.14.9−8.856.05
20.30.4+30.3360.73
What's on this worksheet
Half addition and half subtraction with tenths and hundredths of different lengths, such as 34.7 + 8.25 and 52.4 − 17.86. Each sheet comes with an answer key on a separate page.
Teaching tips
Write a zero in empty places so both numbers have the same number of decimal places.
Check each subtraction by adding the answer to the number you subtracted.
For 6th and 7th grade review, ask students to estimate each answer to the nearest whole number first.
How to use this worksheet maker
Press New worksheet for a fresh set of problems, then Print. To save a PDF instead, choose "Save as PDF" in the print window. Every sheet has a short code in the bottom corner. Copy the link to a sheet and you can print exactly the same problems again later, which is handy for retakes and for sharing with other teachers.
Common Core alignment: 5.NBT.B.7, 6.NS.B.3 (Grades 5–7).