Mixed Addition and Subtraction to 20
On this page children practise switching between + and - while solving within 20. Start with the short method and the examples, then use the online practice or print a worksheet with answers.
How to solve this
- Look at the sign before you calculate.
- For +, count on or make 10.
- For -, count back or return to 10 first.
Examples
12 + 5 = ?
17
18 - 7 = ?
11
Practice problems with answers
Solve these problems on paper or out loud, then check the answer key. The online practice and the printable worksheet give a new set every time.
- 6 - 1 = ___
- 11 - ___ = 9
- 13 - ___ = 5
- 2 - ___ = 1
- ___ + 15 = 17
- 12 - 12 = ___
- 0 + 11 = ___
- 18 + 2 = ___
Show answers
- 5
- 2
- 8
- 1
- 2
- 0
- 11
- 20