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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 743 · 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 8 pink beads and 12 green beads. How many beads are there in all?
  2. 2.2 + 5 + 2 =
  3. 3.Riya has 4 bananas and gets 12 bananas more. How many bananas does Riya have now?
  4. 4.6 + 1 + 5 =
  5. 5.6 + 3 + 6 =
  6. 6.8 + 1 + 3 =
  7. 7.2 + 5 + 8 =
  8. 8.There are 6 yellow flowers and 14 red flowers. How many flowers are there in all?
  9. 9.4 + 6 + 7 =
  10. 10.2 + ? = 6
  11. 11.1 + 10 =
  12. 12.3 + ? = 6
  13. 13.There are 9 red balls and 2 white balls. How many balls are there in all?
  14. 14.9 + ? = 11
  15. 15.1 + 17 =
  16. 16.? + 6 = 8
  17. 17.1 + 4 + 15 =
  18. 18.Riya has 7 shells and gets 13 shells more. How many shells does Riya have now?
  19. 19.18 + 1 =
  20. 20.There are 7 green balls and 4 yellow balls. How many balls are there in all?
  21. 21.Arjun has 3 flowers and gets 11 flowers more. How many flowers does Arjun have now?
  22. 22.2 + ? = 16
  23. 23.8 + 6 =
  24. 24.11 + ? = 12
  25. 25.There are 8 blue balloons and 9 yellow balloons. How many balloons are there in all?
  26. 26.Ishaan has 10 bananas and gets 5 bananas more. How many bananas does Ishaan have now?
  27. 27.Karan has 5 shells and gets 1 shell more. How many shells does Karan have now?
  28. 28.3 + ? = 7
  29. 29.Ananya has 4 flowers and gets 10 flowers more. How many flowers does Ananya have now?
  30. 30.Aditya has 13 pencils and gets 6 pencils more. How many pencils does Aditya have now?
  31. 31.4 + 7 =
  32. 32.4 + ? = 14
  33. 33.Meera has 14 balloons and gets 3 balloons more. How many balloons does Meera have now?
  34. 34.2 + 4 + 1 =
  35. 35.4 + ? = 5
  36. 36.Arjun has 10 shells and gets 4 shells more. How many shells does Arjun have now?
  37. 37.? + 10 = 14
  38. 38.7 + 1 + 12 =
  39. 39.8 + 1 + 5 =
  40. 40.18 + 2 =

Answer key

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

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