Grade 1 Math

Numbers to 20

Numbers to 20 helps children practise ordering numbers to 20, finding missing numbers, and seeing tens and ones. Read the short guide, solve one task online, and print a worksheet for extra repetition.

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

What children practice

  • number order to 20
  • missing numbers in a sequence
  • tens and ones

Practice online

Try one short exercise in the browser.

Printable worksheet

Create a fresh printable worksheet with an answer key for extra practice on paper.

Related topics

Back to Grade 1 Math Previous topic: Number Bonds to 10 Next topic: Addition to 20
Number Line to 10Addition to 20Subtraction to 20

FAQ

What should children know before numbers to 20?

It helps if children are already comfortable with numbers to 10.

What can we do if numbers to 20 feels hard?

Build teen numbers with ten and extra ones. Children often understand 14 faster when they can see one ten and four ones.

How much practice is enough?

A short round of 5 to 10 minutes is usually enough for first graders. Stop while the child is still focused.