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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 230 · 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.? + 7 = 8
  2. 2.? + 1 = 4
  3. 3.There are 9 blue kites and 6 pink kites. How many kites are there in all?
  4. 4.There are 4 blue balloons and 2 green balloons. How many balloons are there in all?
  5. 5.1 + ? = 9
  6. 6.There are 8 white crayons and 3 yellow crayons. How many crayons are there in all?
  7. 7.10 + 4 =
  8. 8.1 + 8 =
  9. 9.Kavya has 6 balls and gets 6 balls more. How many balls does Kavya have now?
  10. 10.7 + 11 =
  11. 11.1 + 6 + 8 =
  12. 12.There are 4 white balls and 5 blue balls. How many balls are there in all?
  13. 13.10 + 9 =
  14. 14.3 + 2 + 10 =
  15. 15.9 + ? = 20
  16. 16.? + 11 = 20
  17. 17.18 + 1 =
  18. 18.1 + 3 + 9 =
  19. 19.Ananya has 15 balloons and gets 1 balloon more. How many balloons does Ananya have now?
  20. 20.3 + 13 =
  21. 21.17 + 1 =
  22. 22.6 + 6 =
  23. 23.Nisha has 6 shells and gets 2 shells more. How many shells does Nisha have now?
  24. 24.12 + 5 =
  25. 25.1 + 4 + 14 =
  26. 26.There are 4 red balls and 16 pink balls. How many balls are there in all?
  27. 27.4 + 7 =
  28. 28.There are 9 red beads and 3 green beads. How many beads are there in all?
  29. 29.1 + 3 + 10 =
  30. 30.7 + 8 =
  31. 31.? + 3 = 14
  32. 32.There are 7 green balloons and 4 blue balloons. How many balloons are there in all?
  33. 33.2 + 6 =
  34. 34.Dev has 9 bananas and gets 11 bananas more. How many bananas does Dev have now?
  35. 35.? + 9 = 12
  36. 36.Karan has 7 shells and gets 7 shells more. How many shells does Karan have now?
  37. 37.9 + 7 =
  38. 38.5 + 9 =
  39. 39.? + 5 = 11
  40. 40.There are 12 white balls and 7 green balls. How many balls are there in all?

Answer key

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

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