Grade 1 Math

Mixed Addition and Subtraction to 20

Mixed Addition and Subtraction to 20 helps children practise switching between + and - while solving within 20. Read the short guide, solve one task online, and print a worksheet for extra repetition.

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

What children practice

  • reading operation signs
  • choosing the right strategy
  • staying flexible across mixed tasks

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: Subtraction to 20 Next topic: Word Problems to 20
Addition to 20Subtraction to 20Word Problems to 20

FAQ

What should children know before mixed Addition and Subtraction to 20?

It helps if children are already comfortable with addition to 20 and subtraction to 20.

What can we do if mixed Addition and Subtraction to 20 feels hard?

Ask the child to pause and name the sign first: plus means more, minus means take away.

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.