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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 786 · 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.Nisha has 2 crayons and gets 13 crayons more. How many crayons does Nisha have now?
  2. 2.9 + ? = 10
  3. 3.1 + 4 + 10 =
  4. 4.2 + 8 + 7 =
  5. 5.9 + 1 =
  6. 6.? + 11 = 15
  7. 7.1 + 5 =
  8. 8.4 + 8 + 6 =
  9. 9.13 + ? = 20
  10. 10.2 + 5 + 9 =
  11. 11.2 + 1 + 13 =
  12. 12.7 + ? = 9
  13. 13.There are 8 pink kites and 9 green kites. How many kites are there in all?
  14. 14.7 + 8 + 1 =
  15. 15.Diya has 10 pencils and gets 10 pencils more. How many pencils does Diya have now?
  16. 16.? + 2 = 3
  17. 17.6 + 2 + 10 =
  18. 18.There are 10 red kites and 4 blue kites. How many kites are there in all?
  19. 19.1 + 2 + 11 =
  20. 20.7 + 3 =
  21. 21.There are 2 blue flowers and 18 red flowers. How many flowers are there in all?
  22. 22.Nisha has 3 marbles and gets 15 marbles more. How many marbles does Nisha have now?
  23. 23.2 + ? = 4
  24. 24.There are 9 green crayons and 7 pink crayons. How many crayons are there in all?
  25. 25.There are 2 yellow crayons and 17 red crayons. How many crayons are there in all?
  26. 26.8 + 8 + 1 =
  27. 27.Pooja has 11 balls and gets 1 ball more. How many balls does Pooja have now?
  28. 28.3 + 4 + 3 =
  29. 29.5 + 4 =
  30. 30.There are 2 pink beads and 13 white beads. How many beads are there in all?
  31. 31.2 + ? = 3
  32. 32.8 + 4 + 1 =
  33. 33.Vivaan has 10 shells and gets 10 shells more. How many shells does Vivaan have now?
  34. 34.1 + 15 =
  35. 35.There are 12 white flowers and 3 yellow flowers. How many flowers are there in all?
  36. 36.There are 11 red crayons and 6 blue crayons. How many crayons are there in all?
  37. 37.There are 2 pink kites and 15 yellow kites. How many kites are there in all?
  38. 38.3 + 2 =
  39. 39.Nisha has 4 balloons and gets 4 balloons more. How many balloons does Nisha have now?
  40. 40.2 + ? = 6

Answer key

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

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