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Adding & Subtracting to 20

Add and take away numbers up to 20 using counting on and counting back.

15 min13 questions

What you'll be able to do

  • I can add two numbers with a total up to 20
  • I can take away to subtract numbers up to 20
  • I can use counting on to add quickly

How this works

  1. 1Read the short explanations first — they teach you what you need before each question.
  2. 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
  3. 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.

What's inside

13 questions and 1 quick teaching card, including:

  • 🔢Number answerWork out the answer and type the number.

👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.

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Curriculum: AC9M1N03, AC9M1N04