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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 380 · 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 12 red crayons and 5 white crayons. How many crayons are there in all?
  2. 2.8 + ? = 9
  3. 3.6 + 2 + 4 =
  4. 4.2 + 6 + 3 =
  5. 5.5 + 7 + 2 =
  6. 6.There are 3 yellow balloons and 14 green balloons. How many balloons are there in all?
  7. 7.9 + 2 =
  8. 8.There are 9 blue balloons and 4 yellow balloons. How many balloons are there in all?
  9. 9.Dev has 15 books and gets 3 books more. How many books does Dev have now?
  10. 10.There are 4 white kites and 5 green kites. How many kites are there in all?
  11. 11.There are 8 blue kites and 7 green kites. How many kites are there in all?
  12. 12.There are 3 red beads and 7 yellow beads. How many beads are there in all?
  13. 13.1 + 4 + 2 =
  14. 14.Dev has 14 crayons and gets 6 crayons more. How many crayons does Dev have now?
  15. 15.12 + 1 =
  16. 16.4 + ? = 5
  17. 17.Rohan has 8 shells and gets 12 shells more. How many shells does Rohan have now?
  18. 18.Kavya has 10 mangoes and gets 2 mangoes more. How many mangoes does Kavya have now?
  19. 19.? + 5 = 11
  20. 20.6 + 9 =
  21. 21.12 + ? = 20
  22. 22.1 + 13 =
  23. 23.There are 2 red kites and 10 white kites. How many kites are there in all?
  24. 24.3 + 5 + 3 =
  25. 25.Manav has 14 balloons and gets 1 balloon more. How many balloons does Manav have now?
  26. 26.? + 2 = 9
  27. 27.There are 8 yellow crayons and 12 green crayons. How many crayons are there in all?
  28. 28.6 + 1 + 8 =
  29. 29.18 + 2 =
  30. 30.Tara has 2 kites and gets 6 kites more. How many kites does Tara have now?
  31. 31.There are 9 white beads and 6 blue beads. How many beads are there in all?
  32. 32.1 + 8 + 11 =
  33. 33.4 + ? = 6
  34. 34.? + 1 = 13
  35. 35.7 + 7 + 1 =
  36. 36.14 + 3 =
  37. 37.10 + 2 =
  38. 38.3 + 13 =
  39. 39.? + 2 = 4
  40. 40.17 + 2 =

Answer key

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

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