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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 281 · 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.? + 1 = 6
  2. 2.There are 12 white crayons and 3 blue crayons. How many crayons are there in all?
  3. 3.There are 10 pink crayons and 9 green crayons. How many crayons are there in all?
  4. 4.2 + 1 + 12 =
  5. 5.4 + 1 =
  6. 6.6 + 6 =
  7. 7.1 + 9 =
  8. 8.2 + 1 + 5 =
  9. 9.6 + 2 + 6 =
  10. 10.Rahul has 8 shells and gets 11 shells more. How many shells does Rahul have now?
  11. 11.? + 9 = 13
  12. 12.12 + 6 =
  13. 13.5 + 6 + 2 =
  14. 14.There are 3 green balls and 4 white balls. How many balls are there in all?
  15. 15.5 + 1 =
  16. 16.7 + 5 + 3 =
  17. 17.18 + 2 =
  18. 18.Manav has 2 balloons and gets 16 balloons more. How many balloons does Manav have now?
  19. 19.9 + 5 =
  20. 20.Aarav has 13 kites and gets 5 kites more. How many kites does Aarav have now?
  21. 21.7 + ? = 13
  22. 22.Vivaan has 11 crayons and gets 2 crayons more. How many crayons does Vivaan have now?
  23. 23.15 + 1 =
  24. 24.9 + 4 =
  25. 25.Pooja has 8 balls and gets 4 balls more. How many balls does Pooja have now?
  26. 26.14 + 4 =
  27. 27.6 + 3 + 2 =
  28. 28.7 + ? = 10
  29. 29.18 + 1 =
  30. 30.1 + 7 =
  31. 31.There are 2 green balls and 9 yellow balls. How many balls are there in all?
  32. 32.There are 10 pink kites and 8 green kites. How many kites are there in all?
  33. 33.? + 2 = 3
  34. 34.Farhan has 8 flowers and gets 11 flowers more. How many flowers does Farhan have now?
  35. 35.There are 10 blue crayons and 6 yellow crayons. How many crayons are there in all?
  36. 36.Kabir has 10 marbles and gets 5 marbles more. How many marbles does Kabir have now?
  37. 37.8 + 3 + 5 =
  38. 38.Riya has 15 crayons and gets 3 crayons more. How many crayons does Riya have now?
  39. 39.19 + 1 =
  40. 40.1 + 4 + 9 =

Answer key

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

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