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Subtraction within 20 for Class 1

What taking away to 20 means, one worked example step by step, and 5 questions to try. No timer, no account.

What it means

Subtracting within 20 means starting with a set, taking some away, and counting what remains. When the ones are not enough, a fast way is to take away down to ten first, then take away the rest.

Worked example: 13 - 5

  1. 1Start with 13: one full ten-frame and 3 loose counters.
  2. 2Split the 5 into 3 and 2.
  3. 3Take away 3 first: 13 - 3 = 10.
  4. 4Take away the last 2: 10 - 2.

8 left5 taken away (3 loose, then 2 from the frame)

So 13 - 5 = 8.

Practice 5 questions

Question 1 of 5

Printable worksheets

Prefer paper? These sheets print on A4 and each has an answer key on the last page.

Take away - Class 1 subtraction
Free printable PDF, with an answer key for grown-ups.PDF

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More topics

Addition within 20 Tens and ones More, fewer, equal All Class 1 topics

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