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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 451 · 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 9 green crayons and 11 red crayons. How many crayons are there in all?
  2. 2.8 + 7 + 2 =
  3. 3.15 + 4 =
  4. 4.? + 1 = 12
  5. 5.Ananya has 6 bananas and gets 12 bananas more. How many bananas does Ananya have now?
  6. 6.There are 5 yellow balloons and 5 red balloons. How many balloons are there in all?
  7. 7.Rohan has 3 flowers and gets 5 flowers more. How many flowers does Rohan have now?
  8. 8.? + 1 = 4
  9. 9.2 + ? = 16
  10. 10.5 + 13 =
  11. 11.1 + 7 + 2 =
  12. 12.10 + 7 =
  13. 13.There are 9 green flowers and 9 red flowers. How many flowers are there in all?
  14. 14.4 + 7 + 6 =
  15. 15.2 + 7 =
  16. 16.11 + 5 =
  17. 17.There are 4 pink kites and 12 red kites. How many kites are there in all?
  18. 18.6 + 7 + 2 =
  19. 19.2 + 3 + 11 =
  20. 20.7 + 9 =
  21. 21.2 + 6 + 6 =
  22. 22.8 + 8 =
  23. 23.? + 8 = 9
  24. 24.5 + 14 =
  25. 25.Ishaan has 4 pencils and gets 12 pencils more. How many pencils does Ishaan have now?
  26. 26.10 + 2 =
  27. 27.4 + 8 =
  28. 28.There are 2 green balloons and 3 yellow balloons. How many balloons are there in all?
  29. 29.Gurpreet has 12 marbles and gets 5 marbles more. How many marbles does Gurpreet have now?
  30. 30.1 + 2 + 8 =
  31. 31.? + 4 = 8
  32. 32.7 + ? = 20
  33. 33.Riya has 4 books and gets 3 books more. How many books does Riya have now?
  34. 34.8 + ? = 11
  35. 35.2 + 4 + 10 =
  36. 36.There are 2 pink balloons and 4 yellow balloons. How many balloons are there in all?
  37. 37.6 + 9 =
  38. 38.Isha has 8 shells and gets 11 shells more. How many shells does Isha have now?
  39. 39.There are 3 yellow beads and 9 pink beads. How many beads are there in all?
  40. 40.There are 10 pink balloons and 3 red balloons. How many balloons are there in all?

Answer key

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

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