MathsYears 1–2Addition & Subtraction

Missing number problems within 20

Solve one-step problems that involve addition and subtraction, using concrete objects and pictorial representations, and missing number problems such as 7 = ? - 9

What you'll learn

  1. 1

    Imagine you have a secret number hidden inside a box! 🎁

  2. 2

    If you have 3 apples and 2 more apples, how many apples in total? 🍎🍎🍎 + 🍎🍎

  3. 3

    Use the number line to jump from 5 to 8 — how many jumps? That's the missing number!

  4. 4

    Find the missing number: 7 + ? = 10

  5. 5

    What number is missing? 4 + ? = 9

  6. 6

    Find the missing number: 12 + ? = 18

  7. 7

    What number is missing? 15 + ? = 20

Practise Missing number problems within 20 with Whizlo

Free AI-tutored lessons, unlimited practice questions, and progress tracking for ages 5–7. Aligned to the UK National Curriculum.

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