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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 570 · 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.There are 8 yellow crayons and 2 blue crayons. How many crayons are there in all?
  2. 2.? + 7 = 8
  3. 3.11 + 2 =
  4. 4.17 + 2 =
  5. 5.? + 1 = 4
  6. 6.3 + 1 + 9 =
  7. 7.1 + ? = 8
  8. 8.3 + 7 + 1 =
  9. 9.5 + 8 + 5 =
  10. 10.2 + ? = 9
  11. 11.1 + 16 =
  12. 12.14 + 6 =
  13. 13.There are 3 red flowers and 12 blue flowers. How many flowers are there in all?
  14. 14.Vivaan has 3 bananas and gets 1 banana more. How many bananas does Vivaan have now?
  15. 15.8 + ? = 17
  16. 16.18 + 2 =
  17. 17.3 + 1 + 3 =
  18. 18.There are 8 pink balls and 6 green balls. How many balls are there in all?
  19. 19.3 + 10 =
  20. 20.Ananya has 5 shells and gets 13 shells more. How many shells does Ananya have now?
  21. 21.Farhan has 5 flowers and gets 3 flowers more. How many flowers does Farhan have now?
  22. 22.Rohan has 7 mangoes and gets 3 mangoes more. How many mangoes does Rohan have now?
  23. 23.5 + 6 + 8 =
  24. 24.16 + 2 =
  25. 25.Meera has 9 balls and gets 9 balls more. How many balls does Meera have now?
  26. 26.There are 12 yellow flowers and 5 green flowers. How many flowers are there in all?
  27. 27.12 + 2 =
  28. 28.There are 11 yellow kites and 5 red kites. How many kites are there in all?
  29. 29.There are 7 white flowers and 2 pink flowers. How many flowers are there in all?
  30. 30.4 + 2 + 7 =
  31. 31.2 + 7 + 8 =
  32. 32.There are 10 yellow balls and 2 green balls. How many balls are there in all?
  33. 33.There are 5 yellow kites and 6 green kites. How many kites are there in all?
  34. 34.5 + 7 + 1 =
  35. 35.1 + ? = 6
  36. 36.9 + ? = 17
  37. 37.? + 2 = 6
  38. 38.There are 2 red beads and 14 blue beads. How many beads are there in all?
  39. 39.Saanvi has 10 shells and gets 2 shells more. How many shells does Saanvi have now?
  40. 40.? + 3 = 10

Answer key

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

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