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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 721 · 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 + 6 + 3 =
  2. 2.6 + 8 + 2 =
  3. 3.There are 7 green flowers and 5 red flowers. How many flowers are there in all?
  4. 4.? + 7 = 18
  5. 5.There are 3 blue balloons and 17 green balloons. How many balloons are there in all?
  6. 6.? + 11 = 13
  7. 7.8 + 3 + 9 =
  8. 8.Nisha has 10 bananas and gets 3 bananas more. How many bananas does Nisha have now?
  9. 9.1 + 6 + 4 =
  10. 10.There are 3 yellow beads and 10 red beads. How many beads are there in all?
  11. 11.Kabir has 15 flowers and gets 1 flower more. How many flowers does Kabir have now?
  12. 12.1 + 9 =
  13. 13.3 + 1 + 3 =
  14. 14.Saanvi has 6 balloons and gets 10 balloons more. How many balloons does Saanvi have now?
  15. 15.? + 6 = 12
  16. 16.10 + ? = 11
  17. 17.8 + ? = 19
  18. 18.17 + 2 =
  19. 19.6 + 3 =
  20. 20.1 + 17 =
  21. 21.There are 8 pink beads and 7 red beads. How many beads are there in all?
  22. 22.Ananya has 12 flowers and gets 5 flowers more. How many flowers does Ananya have now?
  23. 23.There are 9 white balloons and 3 green balloons. How many balloons are there in all?
  24. 24.1 + 2 + 5 =
  25. 25.7 + 8 + 4 =
  26. 26.2 + 7 + 6 =
  27. 27.2 + ? = 4
  28. 28.Farhan has 9 kites and gets 5 kites more. How many kites does Farhan have now?
  29. 29.2 + ? = 11
  30. 30.There are 4 red kites and 5 white kites. How many kites are there in all?
  31. 31.9 + 1 =
  32. 32.5 + 12 =
  33. 33.7 + 4 + 4 =
  34. 34.There are 7 blue kites and 4 red kites. How many kites are there in all?
  35. 35.6 + 6 + 6 =
  36. 36.Ishaan has 11 kites and gets 1 kite more. How many kites does Ishaan have now?
  37. 37.4 + 3 + 7 =
  38. 38.4 + 16 =
  39. 39.There are 7 green balls and 13 red balls. How many balls are there in all?
  40. 40.Manav has 14 crayons and gets 5 crayons more. How many crayons does Manav have now?

Answer key

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

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