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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 661 · 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 6 red balls and 12 green balls. How many balls are there in all?
  2. 2.3 + ? = 4
  3. 3.? + 1 = 4
  4. 4.Arjun has 4 mangoes and gets 15 mangoes more. How many mangoes does Arjun have now?
  5. 5.9 + 2 =
  6. 6.11 + ? = 12
  7. 7.Aarav has 5 marbles and gets 15 marbles more. How many marbles does Aarav have now?
  8. 8.There are 4 white crayons and 3 green crayons. How many crayons are there in all?
  9. 9.4 + 13 =
  10. 10.? + 5 = 6
  11. 11.1 + 6 + 8 =
  12. 12.There are 2 yellow balls and 15 red balls. How many balls are there in all?
  13. 13.7 + 4 + 1 =
  14. 14.1 + ? = 8
  15. 15.7 + 10 =
  16. 16.8 + 5 =
  17. 17.? + 2 = 5
  18. 18.10 + 5 =
  19. 19.4 + 4 =
  20. 20.2 + 1 + 1 =
  21. 21.? + 10 = 12
  22. 22.4 + 1 + 6 =
  23. 23.? + 1 = 8
  24. 24.? + 4 = 7
  25. 25.There are 8 green balls and 11 pink balls. How many balls are there in all?
  26. 26.There are 4 pink beads and 8 red beads. How many beads are there in all?
  27. 27.1 + 8 + 4 =
  28. 28.Gurpreet has 6 books and gets 14 books more. How many books does Gurpreet have now?
  29. 29.There are 7 red flowers and 3 white flowers. How many flowers are there in all?
  30. 30.Arjun has 12 marbles and gets 1 marble more. How many marbles does Arjun have now?
  31. 31.Karan has 9 balls and gets 2 balls more. How many balls does Karan have now?
  32. 32.There are 4 yellow flowers and 9 green flowers. How many flowers are there in all?
  33. 33.? + 4 = 15
  34. 34.15 + 1 =
  35. 35.1 + ? = 4
  36. 36.3 + ? = 5
  37. 37.Tara has 4 shells and gets 12 shells more. How many shells does Tara have now?
  38. 38.There are 6 green flowers and 4 red flowers. How many flowers are there in all?
  39. 39.Saanvi has 15 flowers and gets 3 flowers more. How many flowers does Saanvi have now?
  40. 40.Sneha has 11 marbles and gets 6 marbles more. How many marbles does Sneha have now?

Answer key

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

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