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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 39 · 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. 1.5 + 11 =
  2. 2.8 + 8 + 4 =
  3. 3.6 + 4 + 2 =
  4. 4.? + 1 = 4
  5. 5.19 + 1 =
  6. 6.1 + 8 + 1 =
  7. 7.There are 9 yellow crayons and 2 blue crayons. How many crayons are there in all?
  8. 8.? + 2 = 9
  9. 9.There are 6 blue flowers and 13 yellow flowers. How many flowers are there in all?
  10. 10.4 + 5 =
  11. 11.11 + 5 =
  12. 12.? + 1 = 3
  13. 13.5 + 4 + 1 =
  14. 14.15 + 2 =
  15. 15.2 + 18 =
  16. 16.Priya has 11 flowers and gets 1 flower more. How many flowers does Priya have now?
  17. 17.9 + 2 =
  18. 18.4 + 14 =
  19. 19.Isha has 12 balls and gets 7 balls more. How many balls does Isha have now?
  20. 20.There are 2 pink beads and 3 yellow beads. How many beads are there in all?
  21. 21.2 + ? = 7
  22. 22.There are 12 pink crayons and 7 green crayons. How many crayons are there in all?
  23. 23.8 + 9 =
  24. 24.1 + ? = 12
  25. 25.7 + 6 + 5 =
  26. 26.5 + 12 =
  27. 27.2 + ? = 14
  28. 28.Meera has 12 balls and gets 3 balls more. How many balls does Meera have now?
  29. 29.Nisha has 5 flowers and gets 10 flowers more. How many flowers does Nisha have now?
  30. 30.1 + ? = 5
  31. 31.? + 3 = 11
  32. 32.? + 11 = 17
  33. 33.There are 2 yellow beads and 12 red beads. How many beads are there in all?
  34. 34.2 + 15 =
  35. 35.Ananya has 6 bananas and gets 12 bananas more. How many bananas does Ananya have now?
  36. 36.Priya has 2 balls and gets 1 ball more. How many balls does Priya have now?
  37. 37.4 + 6 =
  38. 38.? + 1 = 6
  39. 39.6 + 11 =
  40. 40.? + 2 = 3

Answer key

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

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