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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 388 · 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 4 yellow balloons and 9 white balloons. How many balloons are there in all?
  2. 2.6 + 9 =
  3. 3.2 + 1 + 6 =
  4. 4.There are 3 pink kites and 10 white kites. How many kites are there in all?
  5. 5.2 + 4 + 11 =
  6. 6.1 + ? = 3
  7. 7.6 + 7 + 5 =
  8. 8.4 + ? = 11
  9. 9.7 + ? = 11
  10. 10.7 + 4 =
  11. 11.Dev has 4 balls and gets 8 balls more. How many balls does Dev have now?
  12. 12.18 + 1 =
  13. 13.Aditya has 3 books and gets 9 books more. How many books does Aditya have now?
  14. 14.? + 1 = 5
  15. 15.3 + 8 =
  16. 16.8 + 6 + 1 =
  17. 17.There are 9 white balls and 4 blue balls. How many balls are there in all?
  18. 18.There are 4 pink flowers and 4 white flowers. How many flowers are there in all?
  19. 19.? + 14 = 15
  20. 20.6 + 4 =
  21. 21.Farhan has 6 mangoes and gets 6 mangoes more. How many mangoes does Farhan have now?
  22. 22.1 + 1 =
  23. 23.5 + 1 + 2 =
  24. 24.Vivaan has 5 pencils and gets 2 pencils more. How many pencils does Vivaan have now?
  25. 25.8 + 1 + 9 =
  26. 26.8 + 3 + 2 =
  27. 27.Priya has 3 balls and gets 15 balls more. How many balls does Priya have now?
  28. 28.5 + 8 + 4 =
  29. 29.2 + 5 + 4 =
  30. 30.1 + 3 + 8 =
  31. 31.There are 4 red flowers and 7 pink flowers. How many flowers are there in all?
  32. 32.? + 2 = 12
  33. 33.Kabir has 7 mangoes and gets 1 mango more. How many mangoes does Kabir have now?
  34. 34.1 + 17 =
  35. 35.1 + 6 + 10 =
  36. 36.8 + 4 + 2 =
  37. 37.5 + ? = 16
  38. 38.9 + 9 =
  39. 39.6 + 13 =
  40. 40.There are 2 green beads and 12 blue beads. How many beads are there in all?

Answer key

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

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