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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 800 · 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 + 14 =
  2. 2.13 + 4 =
  3. 3.2 + 2 + 1 =
  4. 4.1 + ? = 4
  5. 5.7 + 6 + 5 =
  6. 6.There are 2 blue crayons and 3 white crayons. How many crayons are there in all?
  7. 7.3 + 6 =
  8. 8.Ananya has 15 bananas and gets 2 bananas more. How many bananas does Ananya have now?
  9. 9.14 + 6 =
  10. 10.12 + 1 =
  11. 11.There are 8 pink crayons and 11 white crayons. How many crayons are there in all?
  12. 12.6 + 3 + 9 =
  13. 13.Karan has 8 bananas and gets 3 bananas more. How many bananas does Karan have now?
  14. 14.13 + 3 =
  15. 15.2 + ? = 6
  16. 16.3 + 5 =
  17. 17.2 + ? = 4
  18. 18.? + 2 = 7
  19. 19.? + 6 = 7
  20. 20.12 + 2 =
  21. 21.Manav has 13 flowers and gets 3 flowers more. How many flowers does Manav have now?
  22. 22.Isha has 3 marbles and gets 5 marbles more. How many marbles does Isha have now?
  23. 23.2 + 10 =
  24. 24.4 + ? = 6
  25. 25.6 + 1 + 4 =
  26. 26.There are 4 white balloons and 7 red balloons. How many balloons are there in all?
  27. 27.15 + 5 =
  28. 28.There are 2 white balls and 11 red balls. How many balls are there in all?
  29. 29.Pooja has 6 marbles and gets 8 marbles more. How many marbles does Pooja have now?
  30. 30.6 + 9 =
  31. 31.6 + 2 + 5 =
  32. 32.There are 6 red balls and 5 yellow balls. How many balls are there in all?
  33. 33.7 + 9 =
  34. 34.9 + 6 =
  35. 35.? + 17 = 20
  36. 36.11 + 1 =
  37. 37.17 + 1 =
  38. 38.There are 12 red flowers and 5 pink flowers. How many flowers are there in all?
  39. 39.1 + ? = 11
  40. 40.Kavya has 4 shells and gets 15 shells more. How many shells does Kavya have now?

Answer key

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

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