Subtraction Within 20

Subtraction facts from teen numbers, the partner skill to addition within 20. Print it free, with an answer key, or click New problems for a different version.

  • 1st Grade, 2nd Grade
  • 40 problems
  • Common Core 1.OA.C.6
  • Answer key included
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Name: Date: Score: / 40

Subtraction Within 20 (page 1 of 2)

Find each difference.

1.14 − 3 =
2.19 − 6 =
3.16 − 4 =
4.19 − 3 =
5.19 − 0 =
6.11 − 0 =
7.20 − 9 =
8.14 − 10 =
9.19 − 8 =
10.15 − 8 =
11.18 − 6 =
12.11 − 6 =
13.18 − 9 =
14.12 − 1 =
15.13 − 6 =
16.17 − 1 =
17.14 − 6 =
18.13 − 9 =
19.17 − 8 =
20.18 − 1 =
21.10 − 10 =
22.14 − 1 =
23.18 − 7 =
24.20 − 10 =
25.10 − 8 =
26.18 − 8 =
27.17 − 7 =
28.17 − 4 =
29.12 − 7 =
30.13 − 10 =
sheetsprout.orgSheet #372760
Name: Date: Score: / 40

Subtraction Within 20 (page 2 of 2)

Find each difference.

31.14 − 9 =
32.12 − 6 =
33.20 − 1 =
34.18 − 10 =
35.12 − 5 =
36.20 − 2 =
37.12 − 8 =
38.13 − 2 =
39.16 − 0 =
40.13 − 7 =
sheetsprout.orgSheet #372760
Answer key

Subtraction Within 20 (page 1 of 2)

Find each difference.

1.14 − 3 =11
2.19 − 6 =13
3.16 − 4 =12
4.19 − 3 =16
5.19 − 0 =19
6.11 − 0 =11
7.20 − 9 =11
8.14 − 10 =4
9.19 − 8 =11
10.15 − 8 =7
11.18 − 6 =12
12.11 − 6 =5
13.18 − 9 =9
14.12 − 1 =11
15.13 − 6 =7
16.17 − 1 =16
17.14 − 6 =8
18.13 − 9 =4
19.17 − 8 =9
20.18 − 1 =17
21.10 − 10 =0
22.14 − 1 =13
23.18 − 7 =11
24.20 − 10 =10
25.10 − 8 =2
26.18 − 8 =10
27.17 − 7 =10
28.17 − 4 =13
29.12 − 7 =5
30.13 − 10 =3
sheetsprout.orgSheet #372760
Answer key

Subtraction Within 20 (page 2 of 2)

Find each difference.

31.14 − 9 =5
32.12 − 6 =6
33.20 − 1 =19
34.18 − 10 =8
35.12 − 5 =7
36.20 − 2 =18
37.12 − 8 =4
38.13 − 2 =11
39.16 − 0 =16
40.13 − 7 =6
sheetsprout.orgSheet #372760

About this worksheet

This subtraction within 20 worksheet has 40 problems and fits on a single US Letter page or two. It is aligned to Common Core standard 1.OA.C.6 and is typically used in 1st Grade, 2nd Grade. The problems are generated randomly each time you click New problems, so students can practice the same skill repeatedly without memorizing a fixed sheet.

Need something slightly different? Open Customize above to change the number of problems, the number ranges, or the layout. The link in your address bar updates as you go, so you can bookmark or share the exact worksheet you made.

Teaching tips for subtraction

  • Connect subtraction to addition: 13 − 5 = 8 because 8 + 5 = 13. Fact families help both skills.
  • Practice subtraction without regrouping until the column method is solid, then introduce borrowing.
  • Borrowing across zeros (like 400 − 167) is a common sticking point. Give it extra practice with three-digit sheets.
  • Ask students to check answers by adding the difference back to the number taken away.

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