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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 489 · 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 10 blue flowers and 10 green flowers. How many flowers are there in all?
  2. 2.5 + 3 + 3 =
  3. 3.There are 2 red balloons and 14 white balloons. How many balloons are there in all?
  4. 4.Aarav has 7 balls and gets 10 balls more. How many balls does Aarav have now?
  5. 5.5 + 4 =
  6. 6.There are 9 yellow balls and 5 pink balls. How many balls are there in all?
  7. 7.There are 7 white balls and 7 pink balls. How many balls are there in all?
  8. 8.There are 3 red beads and 9 white beads. How many beads are there in all?
  9. 9.7 + 1 + 1 =
  10. 10.? + 12 = 18
  11. 11.7 + 8 + 4 =
  12. 12.? + 8 = 14
  13. 13.4 + 5 + 10 =
  14. 14.There are 7 green beads and 11 white beads. How many beads are there in all?
  15. 15.1 + ? = 9
  16. 16.17 + 3 =
  17. 17.Meera has 10 mangoes and gets 4 mangoes more. How many mangoes does Meera have now?
  18. 18.There are 3 yellow kites and 8 white kites. How many kites are there in all?
  19. 19.3 + 12 =
  20. 20.? + 2 = 4
  21. 21.4 + 2 + 2 =
  22. 22.6 + ? = 20
  23. 23.Diya has 5 marbles and gets 9 marbles more. How many marbles does Diya have now?
  24. 24.There are 3 pink kites and 11 green kites. How many kites are there in all?
  25. 25.4 + 4 =
  26. 26.5 + 15 =
  27. 27.Zoya has 13 balls and gets 3 balls more. How many balls does Zoya have now?
  28. 28.Isha has 7 laddoos and gets 1 laddoo more. How many laddoos does Isha have now?
  29. 29.5 + 2 =
  30. 30.There are 8 red crayons and 5 blue crayons. How many crayons are there in all?
  31. 31.13 + 3 =
  32. 32.7 + ? = 17
  33. 33.4 + ? = 17
  34. 34.3 + 2 =
  35. 35.1 + 7 + 1 =
  36. 36.5 + 7 =
  37. 37.19 + 1 =
  38. 38.1 + 3 + 4 =
  39. 39.There are 11 red beads and 7 green beads. How many beads are there in all?
  40. 40.Manav has 14 balloons and gets 5 balloons more. How many balloons does Manav have now?

Answer key

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

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