Numbers to 20
On this page children practise ordering numbers to 20, finding missing numbers, and seeing tens and ones. Start with the short method and the examples, then use the online practice or print a worksheet with answers.
How to solve this
- Count from 10 to 20 slowly at first.
- Look for the pattern: after 10 come 11, 12, 13, and so on.
- Teen numbers are one ten plus some extra ones.
Examples
Fill the gap: 13, 14, __, 16
15
How many tens and ones are in 18?
1 ten and 8 ones
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.
- 19 ___ 18
- 17 ___ 19
- 19 ___ 14
- 18 ___ 17
- How many ones are in 14?
- 17, 18, ___, 20
- How many ones are in 12?
- How many ones are in 13?
Show answers
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