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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 836 · 40 sums
TalentJR

The method (Count on): Start with the bigger number. Count on the smaller number, one finger at a time. For a missing number (8 + ? = 15), count on from 8 up to 15, or take away: 15 − 8.

NameDateTime takenScore ___ / 40
  1. 1.10 + 2 =
  2. 2.Ishaan has 11 shells and gets 2 shells more. How many shells does Ishaan have now?
  3. 3.Priya has 15 balls and gets 2 balls more. How many balls does Priya have now?
  4. 4.There are 4 white beads and 15 blue beads. How many beads are there in all?
  5. 5.There are 6 green balls and 10 yellow balls. How many balls are there in all?
  6. 6.There are 6 blue flowers and 9 pink flowers. How many flowers are there in all?
  7. 7.12 + ? = 14
  8. 8.2 + 4 + 2 =
  9. 9.? + 2 = 13
  10. 10.6 + 1 + 5 =
  11. 11.There are 8 blue crayons and 6 red crayons. How many crayons are there in all?
  12. 12.7 + 3 =
  13. 13.? + 7 = 8
  14. 14.8 + 1 + 7 =
  15. 15.Karan has 9 mangoes and gets 10 mangoes more. How many mangoes does Karan have now?
  16. 16.14 + 3 =
  17. 17.There are 7 green flowers and 3 red flowers. How many flowers are there in all?
  18. 18.1 + 8 + 11 =
  19. 19.There are 6 blue flowers and 14 white flowers. How many flowers are there in all?
  20. 20.17 + 1 =
  21. 21.6 + ? = 12
  22. 22.There are 8 yellow balloons and 9 white balloons. How many balloons are there in all?
  23. 23.8 + 3 + 2 =
  24. 24.17 + 3 =
  25. 25.4 + ? = 9
  26. 26.8 + 2 + 3 =
  27. 27.5 + 2 + 3 =
  28. 28.7 + 3 + 10 =
  29. 29.? + 4 = 6
  30. 30.Ananya has 12 flowers and gets 7 flowers more. How many flowers does Ananya have now?
  31. 31.1 + 6 + 13 =
  32. 32.There are 5 green crayons and 10 red crayons. How many crayons are there in all?
  33. 33.There are 9 red balloons and 9 blue balloons. How many balloons are there in all?
  34. 34.There are 6 blue crayons and 6 white crayons. How many crayons are there in all?
  35. 35.5 + 2 + 11 =
  36. 36.4 + ? = 10
  37. 37.Joseph has 15 pencils and gets 5 pencils more. How many pencils does Joseph have now?
  38. 38.? + 1 = 8
  39. 39.6 + 2 + 11 =
  40. 40.? + 1 = 7

Answer key

  1. 12
  2. 13
  3. 17
  4. 19
  5. 16
  6. 15
  7. 2
  8. 8
  9. 11
  10. 12
  11. 14
  12. 10
  13. 1
  14. 16
  15. 19
  16. 17
  17. 10
  18. 20
  19. 20
  20. 18
  21. 6
  22. 17
  23. 13
  24. 20
  25. 5
  26. 13
  27. 10
  28. 20
  29. 2
  30. 19
  31. 20
  32. 15
  33. 18
  34. 12
  35. 18
  36. 6
  37. 20
  38. 7
  39. 19
  40. 6

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