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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 456 · 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.Manav has 8 marbles and gets 2 marbles more. How many marbles does Manav have now?
  2. 2.1 + 4 + 14 =
  3. 3.5 + ? = 6
  4. 4.There are 3 green balloons and 6 white balloons. How many balloons are there in all?
  5. 5.15 + 3 =
  6. 6.1 + 1 + 18 =
  7. 7.There are 3 green balloons and 16 yellow balloons. How many balloons are there in all?
  8. 8.8 + 8 + 1 =
  9. 9.There are 4 white balls and 3 green balls. How many balls are there in all?
  10. 10.? + 1 = 8
  11. 11.18 + 1 =
  12. 12.2 + 5 + 10 =
  13. 13.Ishaan has 13 marbles and gets 3 marbles more. How many marbles does Ishaan have now?
  14. 14.There are 9 yellow beads and 3 green beads. How many beads are there in all?
  15. 15.10 + ? = 13
  16. 16.6 + 2 + 1 =
  17. 17.10 + 4 =
  18. 18.14 + 5 =
  19. 19.8 + 1 + 10 =
  20. 20.There are 9 white crayons and 10 green crayons. How many crayons are there in all?
  21. 21.Kavya has 9 pencils and gets 6 pencils more. How many pencils does Kavya have now?
  22. 22.13 + 7 =
  23. 23.13 + 1 =
  24. 24.There are 4 green balloons and 9 pink balloons. How many balloons are there in all?
  25. 25.? + 1 = 7
  26. 26.2 + 1 + 5 =
  27. 27.There are 6 red balloons and 2 white balloons. How many balloons are there in all?
  28. 28.1 + 15 =
  29. 29.5 + 1 + 1 =
  30. 30.There are 11 pink kites and 4 white kites. How many kites are there in all?
  31. 31.There are 2 blue beads and 4 pink beads. How many beads are there in all?
  32. 32.Zoya has 9 kites and gets 4 kites more. How many kites does Zoya have now?
  33. 33.13 + 4 =
  34. 34.There are 2 pink beads and 11 white beads. How many beads are there in all?
  35. 35.2 + 3 + 1 =
  36. 36.Pooja has 9 marbles and gets 5 marbles more. How many marbles does Pooja have now?
  37. 37.3 + ? = 7
  38. 38.19 + 1 =
  39. 39.15 + 4 =
  40. 40.? + 10 = 17

Answer key

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

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