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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 879 · 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. 1.3 + 7 + 9 =
  2. 2.2 + 5 + 4 =
  3. 3.3 + 6 + 4 =
  4. 4.5 + ? = 6
  5. 5.There are 11 green beads and 2 blue beads. How many beads are there in all?
  6. 6.Joseph has 5 marbles and gets 3 marbles more. How many marbles does Joseph have now?
  7. 7.Nisha has 8 kites and gets 4 kites more. How many kites does Nisha have now?
  8. 8.There are 8 red beads and 12 pink beads. How many beads are there in all?
  9. 9.Lakshmi has 10 flowers and gets 5 flowers more. How many flowers does Lakshmi have now?
  10. 10.10 + 9 =
  11. 11.There are 8 pink crayons and 6 blue crayons. How many crayons are there in all?
  12. 12.Tara has 9 balls and gets 6 balls more. How many balls does Tara have now?
  13. 13.There are 8 blue flowers and 11 red flowers. How many flowers are there in all?
  14. 14.5 + 15 =
  15. 15.1 + 8 =
  16. 16.2 + ? = 5
  17. 17.4 + 11 =
  18. 18.Arjun has 2 bananas and gets 5 bananas more. How many bananas does Arjun have now?
  19. 19.6 + 4 + 3 =
  20. 20.There are 10 red beads and 3 white beads. How many beads are there in all?
  21. 21.8 + 5 + 4 =
  22. 22.3 + 7 + 2 =
  23. 23.1 + 7 + 9 =
  24. 24.? + 3 = 17
  25. 25.2 + 1 =
  26. 26.13 + 3 =
  27. 27.? + 1 = 18
  28. 28.2 + 2 + 6 =
  29. 29.10 + 7 =
  30. 30.There are 9 blue flowers and 9 red flowers. How many flowers are there in all?
  31. 31.7 + 8 =
  32. 32.4 + ? = 16
  33. 33.Joseph has 13 mangoes and gets 4 mangoes more. How many mangoes does Joseph have now?
  34. 34.4 + 4 + 7 =
  35. 35.6 + ? = 7
  36. 36.18 + 1 =
  37. 37.Meera has 5 mangoes and gets 14 mangoes more. How many mangoes does Meera have now?
  38. 38.8 + 5 + 7 =
  39. 39.? + 1 = 3
  40. 40.There are 7 red kites and 6 yellow kites. How many kites are there in all?

Answer key

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

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