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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 823 · 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. 1.14 + 6 =
  2. 2.? + 3 = 5
  3. 3.Kavya has 4 shells and gets 5 shells more. How many shells does Kavya have now?
  4. 4.Arjun has 8 flowers and gets 6 flowers more. How many flowers does Arjun have now?
  5. 5.3 + 17 =
  6. 6.5 + 15 =
  7. 7.2 + 2 =
  8. 8.7 + ? = 12
  9. 9.There are 11 yellow balloons and 7 green balloons. How many balloons are there in all?
  10. 10.Pooja has 10 flowers and gets 6 flowers more. How many flowers does Pooja have now?
  11. 11.7 + 3 + 7 =
  12. 12.Rahul has 14 crayons and gets 6 crayons more. How many crayons does Rahul have now?
  13. 13.2 + ? = 9
  14. 14.2 + 3 + 8 =
  15. 15.There are 3 yellow flowers and 13 red flowers. How many flowers are there in all?
  16. 16.3 + ? = 11
  17. 17.8 + ? = 9
  18. 18.There are 8 red balls and 3 pink balls. How many balls are there in all?
  19. 19.5 + 3 =
  20. 20.5 + 13 =
  21. 21.Kavya has 3 mangoes and gets 16 mangoes more. How many mangoes does Kavya have now?
  22. 22.There are 11 red beads and 2 blue beads. How many beads are there in all?
  23. 23.There are 7 white crayons and 10 red crayons. How many crayons are there in all?
  24. 24.1 + ? = 4
  25. 25.There are 7 pink kites and 2 yellow kites. How many kites are there in all?
  26. 26.4 + 3 + 9 =
  27. 27.10 + 7 =
  28. 28.5 + 2 + 13 =
  29. 29.1 + 8 + 11 =
  30. 30.There are 5 yellow flowers and 3 blue flowers. How many flowers are there in all?
  31. 31.There are 8 white balls and 7 green balls. How many balls are there in all?
  32. 32.4 + ? = 20
  33. 33.17 + 2 =
  34. 34.10 + ? = 16
  35. 35.7 + 1 =
  36. 36.? + 1 = 7
  37. 37.2 + 14 =
  38. 38.2 + 17 =
  39. 39.Aarav has 4 kites and gets 4 kites more. How many kites does Aarav have now?
  40. 40.4 + 1 + 11 =

Answer key

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

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