Free Year 1 addition and subtraction worksheets within 20 (PDF)
Adding, taking away and missing numbers, all within 20. For Year 1, ages 5 to 6.
What’s in it
Three worksheets of 20 questions: adding, taking away, and missing-number sums like 7 = □ − 9, which Year 1 children are expected to do. All the numbers stay within 20.
Your child can count on fingers or draw dots. Mark each page with the answers at the back and go over any they found tricky.
- Page 1Adding
- Page 2Taking away
- Page 3Missing numbers
- Answers
The first pages
As they print, in black and white on A4.
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Page 1 of 4 
Page 2 of 4 
Page 3 of 4
More free printables
Everything for Year 1 is on one page: all 5 Year 1 printables. Or see every subject.
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Year 1 number bondsPairs that make 10 and 20, and using one to work out the other.
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Year 1 counting in 2s, 5s, 10sCount on and back in 2s, 5s and 10s, and the patterns on a hundred square.
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Year 1 halves and quartersSpot equal parts, shade a half or a quarter, and halve a group.
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Year 1 telling the timeRead o’clock and half past on clock faces, then draw the hands.
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11+ maths facts and formulasThe maths formulas and facts for the 11+, each with a small drawing.
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Fractions, decimals and percentagesFractions, decimals and percentages, explained with pictures.
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