Solve twenty carefully ordered subtraction questions with generous writing space, then check the same facts on the optional answer page.
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Subtraction within 20
Solve the subtraction problems. Write each answer in the space provided.
Name: Date:
Hint: Think about how far you need to count back.
Question 1:1.9 − 5 =
Question 2:2.8 − 1 =
Question 3:3.5 − 1 =
Question 4:4.7 − 5 =
Question 5:5.9 − 4 =
Question 6:6.9 − 7 =
Question 7:7.18 − 1 =
Question 8:8.15 − 3 =
Question 9:9.15 − 2 =
Question 10:10.16 − 3 =
Question 11:11.19 − 2 =
Question 12:12.18 − 5 =
Question 13:13.11 − 2 =
Question 14:14.13 − 9 =
Question 15:15.17 − 8 =
Question 16:16.11 − 7 =
Question 17:17.14 − 7 =
Question 18:18.16 − 8 =
Question 19:19.17 − 4 =
Question 20:20.16 − 4 =
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Answer key
Compare each answer with the same question on the worksheet.
1.9 − 5 =4
2.8 − 1 =7
3.5 − 1 =4
4.7 − 5 =2
5.9 − 4 =5
6.9 − 7 =2
7.18 − 1 =17
8.15 − 3 =12
9.15 − 2 =13
10.16 − 3 =13
11.19 − 2 =17
12.18 − 5 =13
13.11 − 2 =9
14.13 − 9 =4
15.17 − 8 =9
16.11 − 7 =4
17.14 − 7 =7
18.16 − 8 =8
19.17 − 4 =13
20.16 − 4 =12
What is on the worksheet?
The twenty questions begin with familiar facts, continue with subtraction within 20 without crossing ten, and then practise crossing ten. Two final mixed questions bring the ideas together without repeating a fact.
Count back through ten
When a subtraction crosses ten, think about how far you need to count back. Write each answer on the line, then show the answer key or continue with the matching online practice.
