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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 391 · 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. 1.1 + ? = 14
  2. 2.12 + 3 =
  3. 3.11 + ? = 18
  4. 4.7 + 6 + 3 =
  5. 5.Aarav has 14 bananas and gets 2 bananas more. How many bananas does Aarav have now?
  6. 6.1 + 7 + 10 =
  7. 7.8 + 1 + 3 =
  8. 8.3 + 1 + 14 =
  9. 9.Manav has 9 kites and gets 7 kites more. How many kites does Manav have now?
  10. 10.There are 2 yellow beads and 9 white beads. How many beads are there in all?
  11. 11.3 + ? = 5
  12. 12.8 + 5 + 5 =
  13. 13.There are 3 white beads and 2 pink beads. How many beads are there in all?
  14. 14.2 + 1 + 13 =
  15. 15.19 + 1 =
  16. 16.16 + ? = 20
  17. 17.Priya has 2 marbles and gets 11 marbles more. How many marbles does Priya have now?
  18. 18.2 + 1 + 7 =
  19. 19.8 + 5 + 1 =
  20. 20.2 + ? = 5
  21. 21.Lakshmi has 7 flowers and gets 7 flowers more. How many flowers does Lakshmi have now?
  22. 22.5 + 6 + 2 =
  23. 23.12 + 5 =
  24. 24.8 + 7 + 5 =
  25. 25.There are 4 blue balls and 13 white balls. How many balls are there in all?
  26. 26.There are 3 blue kites and 16 white kites. How many kites are there in all?
  27. 27.2 + 7 =
  28. 28.5 + ? = 7
  29. 29.? + 2 = 17
  30. 30.There are 6 blue flowers and 4 red flowers. How many flowers are there in all?
  31. 31.6 + 1 + 3 =
  32. 32.2 + ? = 3
  33. 33.2 + 3 + 13 =
  34. 34.11 + 5 =
  35. 35.Joseph has 14 flowers and gets 5 flowers more. How many flowers does Joseph have now?
  36. 36.8 + 12 =
  37. 37.There are 6 green balls and 12 white balls. How many balls are there in all?
  38. 38.18 + 2 =
  39. 39.Meera has 8 balloons and gets 1 balloon more. How many balloons does Meera have now?
  40. 40.There are 7 blue flowers and 12 pink flowers. How many flowers are there in all?

Answer key

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

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