This set of no-prep math worksheets is a fun way for your students to practise addition and subtraction within 20. Perfect to use in your math centres, for early finishers, as homework, or to leave with a supply teacher.

On each page, students solve addition and subtraction problems with sums or differences up to 20. Then they colour each section according to the key. If all the problems are solved and coloured correctly, a fun picture will be revealed.

Includes 15 colour by number worksheets:

• Addition within 10 review (1 page)
• Subtraction within 10 review (1 page)
• Addition within 20
• Subtraction within 20
• Mixed addition and subtraction within 20

This resource provides plenty of computation practice for young learners.

Answer keys are included.