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Maths · Year 1

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Addition within 20

Add two numbers up to 20. Use the + and = signs.

Name:
Date:
Try each question. If you're stuck, leave it and come back. The answer key is on the last page.
  1. 1

    How many altogether? 🍎🍎 + 🍎🍎🍎 = ___

    Answer:
  2. 2

    Add the numbers. 3 + 4 = ___

    Answer:
  3. 3

    What is 5 + 2? A) 6 B) 7 C) 8 D) 9

    Answer:
  4. 4

    How many altogether? 🍎🍎🍎 + 🍎🍎 3 + 2 = ___

    Answer:
  5. 5

    Sam has 4 sweets. Mum gives him 3 more. How many altogether? 4 + 3 = ___ sweets

    Answer:
  6. 6

    Add these numbers. 6 + 5 = ___

    Answer:
  7. 7

    What is 8 + 5? A) 12 B) 13 C) 14 D) 15

    Answer:
  8. 8

    Add these. 9 + 9 = ___

    Answer:
  9. 9

    There are 10 ducks in a pond. 6 more ducks join. How many now? 10 + 6 = ___ ducks

    Answer:
  10. 10

    What is 7 + 8? A) 13 B) 14 C) 15 D) 16

    Answer:

Answer key

Addition within 20 · for parents and teachers

  1. 1

    5

    2 + 3 = 5. There are 5 apples in total.

  2. 2

    7

    3 + 4 = 7.

  3. 3

    7

    5 + 2 = 7.

  4. 4

    5

    3 + 2 = 5.

  5. 5

    7

    4 + 3 = 7. Sam has 7 sweets in total.

  6. 6

    11

    6 + 5 = 11.

  7. 7

    13

    8 + 5 = 13.

  8. 8

    18

    9 + 9 = 18.

  9. 9

    16

    10 + 6 = 16. There are 16 ducks in total.

  10. 10

    15

    7 + 8 = 15.