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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 219 · 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. 1.2 + ? = 9
  2. 2.Farhan has 7 mangoes and gets 13 mangoes more. How many mangoes does Farhan have now?
  3. 3.7 + ? = 20
  4. 4.Aarav has 6 mangoes and gets 13 mangoes more. How many mangoes does Aarav have now?
  5. 5.5 + 1 =
  6. 6.5 + 3 + 8 =
  7. 7.5 + 1 + 13 =
  8. 8.? + 2 = 10
  9. 9.There are 4 red beads and 6 white beads. How many beads are there in all?
  10. 10.19 + 1 =
  11. 11.8 + ? = 15
  12. 12.There are 3 pink crayons and 16 blue crayons. How many crayons are there in all?
  13. 13.Priya has 13 mangoes and gets 2 mangoes more. How many mangoes does Priya have now?
  14. 14.There are 10 yellow crayons and 2 white crayons. How many crayons are there in all?
  15. 15.2 + 3 + 7 =
  16. 16.Aarav has 3 shells and gets 11 shells more. How many shells does Aarav have now?
  17. 17.? + 1 = 5
  18. 18.4 + 5 + 5 =
  19. 19.7 + 6 =
  20. 20.18 + 1 =
  21. 21.1 + ? = 8
  22. 22.4 + 12 =
  23. 23.? + 4 = 8
  24. 24.Ishaan has 7 pencils and gets 10 pencils more. How many pencils does Ishaan have now?
  25. 25.Manav has 3 shells and gets 2 shells more. How many shells does Manav have now?
  26. 26.6 + ? = 7
  27. 27.There are 11 white kites and 3 yellow kites. How many kites are there in all?
  28. 28.There are 10 green balloons and 4 pink balloons. How many balloons are there in all?
  29. 29.5 + 8 + 3 =
  30. 30.10 + 6 =
  31. 31.? + 2 = 15
  32. 32.? + 9 = 18
  33. 33.14 + 2 =
  34. 34.There are 4 yellow balloons and 9 green balloons. How many balloons are there in all?
  35. 35.There are 8 yellow beads and 6 green beads. How many beads are there in all?
  36. 36.There are 12 red crayons and 7 blue crayons. How many crayons are there in all?
  37. 37.Kabir has 14 bananas and gets 3 bananas more. How many bananas does Kabir have now?
  38. 38.6 + ? = 19
  39. 39.13 + ? = 19
  40. 40.7 + 6 + 5 =

Answer key

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

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