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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 201 · 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 red balls and 2 yellow balls. How many balls are there in all?
  2. 2.? + 3 = 18
  3. 3.12 + ? = 20
  4. 4.Kabir has 14 mangoes and gets 6 mangoes more. How many mangoes does Kabir have now?
  5. 5.19 + 1 =
  6. 6.Aarav has 11 laddoos and gets 7 laddoos more. How many laddoos does Aarav have now?
  7. 7.There are 9 red crayons and 6 yellow crayons. How many crayons are there in all?
  8. 8.Lakshmi has 7 balls and gets 3 balls more. How many balls does Lakshmi have now?
  9. 9.Isha has 2 bananas and gets 2 bananas more. How many bananas does Isha have now?
  10. 10.7 + ? = 12
  11. 11.Arjun has 11 books and gets 4 books more. How many books does Arjun have now?
  12. 12.Rahul has 5 flowers and gets 15 flowers more. How many flowers does Rahul have now?
  13. 13.There are 6 yellow beads and 4 green beads. How many beads are there in all?
  14. 14.Ishaan has 15 shells and gets 5 shells more. How many shells does Ishaan have now?
  15. 15.There are 5 red crayons and 10 green crayons. How many crayons are there in all?
  16. 16.? + 2 = 12
  17. 17.There are 8 blue beads and 2 red beads. How many beads are there in all?
  18. 18.There are 12 yellow crayons and 4 green crayons. How many crayons are there in all?
  19. 19.Gurpreet has 14 bananas and gets 4 bananas more. How many bananas does Gurpreet have now?
  20. 20.There are 12 blue balloons and 2 white balloons. How many balloons are there in all?
  21. 21.There are 6 red crayons and 10 green crayons. How many crayons are there in all?
  22. 22.There are 6 red flowers and 11 yellow flowers. How many flowers are there in all?
  23. 23.8 + 6 + 1 =
  24. 24.2 + 2 + 1 =
  25. 25.4 + 15 =
  26. 26.3 + ? = 4
  27. 27.? + 3 = 20
  28. 28.1 + 2 =
  29. 29.10 + 1 =
  30. 30.1 + 2 + 10 =
  31. 31.Lakshmi has 10 flowers and gets 8 flowers more. How many flowers does Lakshmi have now?
  32. 32.There are 9 red crayons and 5 green crayons. How many crayons are there in all?
  33. 33.? + 3 = 19
  34. 34.15 + 4 =
  35. 35.There are 12 green crayons and 5 red crayons. How many crayons are there in all?
  36. 36.8 + 3 + 4 =
  37. 37.There are 7 green balls and 8 yellow balls. How many balls are there in all?
  38. 38.5 + 3 + 4 =
  39. 39.? + 15 = 20
  40. 40.There are 10 green balloons and 5 white balloons. How many balloons are there in all?

Answer key

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

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