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MATH · SUBTRACTION · GRADE 1

Subtraction Within 20 Worksheet

30 subtraction facts within 20 for fluency practice, with an answer key. Free to print on A4 or US Letter.

Name: ______________________Date: ____________

Subtraction Within 20 Worksheet

Subtract and write the difference on the line.

16 − 15 = ____
20 − 14 = ____
17 − 3 = ____
11 − 1 = ____
19 − 19 = ____
17 − 16 = ____
20 − 3 = ____
16 − 16 = ____
18 − 2 = ____
16 − 7 = ____
14 − 12 = ____
17 − 7 = ____
9 − 4 = ____
13 − 6 = ____
20 − 5 = ____
19 − 14 = ____
6 − 1 = ____
12 − 6 = ____
15 − 8 = ____
15 − 4 = ____
14 − 5 = ____
14 − 10 = ____
10 − 7 = ____
16 − 13 = ____
7 − 1 = ____
18 − 18 = ____
10 − 6 = ____
20 − 7 = ____
9 − 7 = ____
9 − 1 = ____

Name: ______________________Date: ____________

Subtraction Within 20 Worksheet — Answer Key

16 − 15 = 1
20 − 14 = 6
17 − 3 = 14
11 − 1 = 10
19 − 19 = 0
17 − 16 = 1
20 − 3 = 17
16 − 16 = 0
18 − 2 = 16
16 − 7 = 9
14 − 12 = 2
17 − 7 = 10
9 − 4 = 5
13 − 6 = 7
20 − 5 = 15
19 − 14 = 5
6 − 1 = 5
12 − 6 = 6
15 − 8 = 7
15 − 4 = 11
14 − 5 = 9
14 − 10 = 4
10 − 7 = 3
16 − 13 = 3
7 − 1 = 6
18 − 18 = 0
10 − 6 = 4
20 − 7 = 13
9 − 7 = 2
9 − 1 = 8

How to use this worksheet

Pair with the addition sheet so children see subtraction as the opposite operation.
Let learners draw dots or use a number line for harder facts.
Review mistakes with the answer key rather than giving answers up front.

Skills practised

Subtraction facts to 20
Fact families
Mental math

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