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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 277 · 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. 1.4 + ? = 18
  2. 2.7 + 5 =
  3. 3.Saanvi has 9 bananas and gets 2 bananas more. How many bananas does Saanvi have now?
  4. 4.1 + 4 + 1 =
  5. 5.1 + 8 + 1 =
  6. 6.10 + 1 =
  7. 7.10 + ? = 11
  8. 8.4 + 6 + 7 =
  9. 9.? + 3 = 16
  10. 10.3 + 2 + 11 =
  11. 11.8 + 2 + 1 =
  12. 12.? + 1 = 5
  13. 13.14 + 2 =
  14. 14.1 + 1 + 17 =
  15. 15.2 + 3 =
  16. 16.? + 8 = 14
  17. 17.1 + ? = 12
  18. 18.14 + 1 =
  19. 19.7 + 4 =
  20. 20.5 + 4 + 1 =
  21. 21.? + 3 = 10
  22. 22.There are 5 white kites and 4 blue kites. How many kites are there in all?
  23. 23.2 + 3 + 6 =
  24. 24.Arjun has 6 crayons and gets 14 crayons more. How many crayons does Arjun have now?
  25. 25.2 + 14 =
  26. 26.19 + 1 =
  27. 27.There are 11 yellow beads and 6 red beads. How many beads are there in all?
  28. 28.There are 4 pink balloons and 11 red balloons. How many balloons are there in all?
  29. 29.6 + 1 + 8 =
  30. 30.18 + 1 =
  31. 31.12 + 8 =
  32. 32.1 + 3 + 7 =
  33. 33.2 + 8 =
  34. 34.There are 12 blue crayons and 3 yellow crayons. How many crayons are there in all?
  35. 35.There are 3 green balls and 3 pink balls. How many balls are there in all?
  36. 36.16 + 3 =
  37. 37.? + 10 = 20
  38. 38.2 + ? = 16
  39. 39.12 + 2 =
  40. 40.9 + ? = 15

Answer key

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

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