Addition to 20 without crossing 10
On this page children practise adding within 20 when the ones do not cross 10, like 13 + 4. Start with the short method and the examples, then use the online practice or print a worksheet with answers.
How to solve this
- Add the ones digits first.
- The ones stay below 10, so there is no carry.
- Keep the ten and write the new ones.
Examples
13 + 4 = ?
17
11 + 6 = ?
17
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.
- 4 + 13 = ___
- 13 + 3 = ___
- 5 + ___ = 7
- 2 + ___ = 4
- 11 + ___ = 17
- 3 + ___ = 6
- 6 + 2 = ___
- 13 + ___ = 15
Show answers
- 17
- 16
- 2
- 2
- 6
- 3
- 8
- 2