Decimal operations worksheet

Grade 6 math, Common Core 6.NS.B.3. 10 problems with an answer key and worked steps. Free to print, and you can make new problems any time.

By the StudyWiz teamUpdated October 23, 2026How we write our pages

Print the answer key

NameDate

Decimal operations

Grade 6 math, Common Core 6.NS.B.3

Add, subtract, multiply or divide.

1.
22.5 ÷ 5
2.
40.13 − 32.1
3.
6.5 × 1.2
4.
51.33 − 4.47
5.
39.37 + 15.9
6.
54.53 + 18.6
7.
9 × 1.4
8.
6 ÷ 5
9.
45.58 − 35.84
10.
4.2 ÷ 0.6

Answer key: Decimal operations

Grade 6 math. Each answer has a few worked steps, to help check the method as well as the answer.

1. 4.5
5 × 4.5 = 22.5
2. 8.03
Line up the decimal points: 40.13 − 32.10
3. 7.8
65 × 12 = 7802 decimal places in all: 7.8
4. 46.86
Line up the decimal points: 51.33 − 4.47
5. 55.27
Line up the decimal points: 39.37 + 15.90
6. 73.13
Line up the decimal points: 54.53 + 18.60
7. 12.6
90 × 14 = 1,2602 decimal places in all: 12.6
8. 1.2
5 × 1.2 = 6
9. 9.74
Line up the decimal points: 45.58 − 35.84
10. 7
Multiply both by 10: 42 ÷ 6= 7

The answer key prints on its own page. You’re welcome to print and copy these worksheets for your own kids or class.

About decimal operations

To add or subtract decimals, line up the decimal points and fill in zeros where needed. To multiply, multiply as if there were no decimal points, then count the decimal places in both numbers. To divide by a decimal, move the decimal point in both numbers until you are dividing by a whole number.

Worked example 1

73.66 + 39

Step 1.Line up the decimal points: 73.66 + 39.00

Answer: 112.66

Worked example 2

30.26 + 20.6

Step 1.Line up the decimal points: 30.26 + 20.60

Answer: 50.86

Worked example 3

50.31 + 88.6

Step 1.Line up the decimal points: 50.31 + 88.60

Answer: 138.91

Watch out for

Line up the decimal points, not the last digits, when you add or subtract.
When you multiply, the answer has as many decimal places as both numbers together.
Estimate first: 7.56 ÷ 0.6 should be a bit more than 7 ÷ 0.5 = 14.

Practice decimal operations online

On StudyWiz, your kid can practice decimal operations with 5-question quizzes that are checked as they go, with an explanation for every answer. When a homework problem is the trouble, Wiz gives a hint for each step instead of the answer.

Keep reading

Try Wiz with tonight’s homework

Free to start, no card needed. Each kid gets 3 homework questions, 5 practice quizzes and 1 writing review a day on the free plan.

Start free See pricing