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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 422 · 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. 1.5 + 4 + 8 =
  2. 2.There are 3 white balloons and 7 yellow balloons. How many balloons are there in all?
  3. 3.There are 7 white crayons and 13 blue crayons. How many crayons are there in all?
  4. 4.Gurpreet has 5 laddoos and gets 5 laddoos more. How many laddoos does Gurpreet have now?
  5. 5.There are 5 red balls and 6 blue balls. How many balls are there in all?
  6. 6.5 + 15 =
  7. 7.14 + 5 =
  8. 8.16 + ? = 20
  9. 9.5 + 6 =
  10. 10.14 + 6 =
  11. 11.Dev has 11 balloons and gets 1 balloon more. How many balloons does Dev have now?
  12. 12.2 + 2 + 3 =
  13. 13.There are 12 pink balloons and 6 red balloons. How many balloons are there in all?
  14. 14.2 + 5 + 12 =
  15. 15.2 + 5 + 3 =
  16. 16.6 + 6 + 3 =
  17. 17.Kabir has 2 balls and gets 11 balls more. How many balls does Kabir have now?
  18. 18.10 + 1 =
  19. 19.Kabir has 14 flowers and gets 1 flower more. How many flowers does Kabir have now?
  20. 20.8 + 3 + 7 =
  21. 21.Ananya has 8 mangoes and gets 11 mangoes more. How many mangoes does Ananya have now?
  22. 22.7 + 7 + 2 =
  23. 23.4 + 16 =
  24. 24.5 + ? = 7
  25. 25.? + 7 = 9
  26. 26.8 + 2 + 8 =
  27. 27.1 + 5 + 8 =
  28. 28.Dev has 10 balls and gets 2 balls more. How many balls does Dev have now?
  29. 29.8 + 1 + 10 =
  30. 30.6 + ? = 14
  31. 31.There are 12 white crayons and 2 pink crayons. How many crayons are there in all?
  32. 32.3 + 10 =
  33. 33.There are 4 white balloons and 5 green balloons. How many balloons are there in all?
  34. 34.7 + 9 =
  35. 35.6 + 13 =
  36. 36.3 + ? = 19
  37. 37.There are 3 green flowers and 11 blue flowers. How many flowers are there in all?
  38. 38.9 + 4 =
  39. 39.There are 2 green balloons and 14 white balloons. How many balloons are there in all?
  40. 40.There are 8 pink balloons and 6 yellow balloons. How many balloons are there in all?

Answer key

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

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