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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 901 · 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.? + 8 = 20
  2. 2.7 + 3 + 10 =
  3. 3.There are 6 pink beads and 12 blue beads. How many beads are there in all?
  4. 4.Meera has 3 books and gets 5 books more. How many books does Meera have now?
  5. 5.Saanvi has 11 marbles and gets 5 marbles more. How many marbles does Saanvi have now?
  6. 6.There are 6 white balloons and 11 green balloons. How many balloons are there in all?
  7. 7.2 + 17 =
  8. 8.8 + 4 + 6 =
  9. 9.3 + ? = 6
  10. 10.2 + 16 =
  11. 11.Aarav has 12 balls and gets 5 balls more. How many balls does Aarav have now?
  12. 12.Kavya has 10 bananas and gets 2 bananas more. How many bananas does Kavya have now?
  13. 13.6 + 1 + 11 =
  14. 14.3 + 8 =
  15. 15.Nisha has 15 bananas and gets 5 bananas more. How many bananas does Nisha have now?
  16. 16.12 + ? = 15
  17. 17.4 + 8 + 5 =
  18. 18.There are 11 white crayons and 5 red crayons. How many crayons are there in all?
  19. 19.4 + 15 =
  20. 20.7 + 3 + 7 =
  21. 21.There are 2 yellow balls and 13 pink balls. How many balls are there in all?
  22. 22.3 + ? = 11
  23. 23.4 + 7 + 6 =
  24. 24.Nisha has 10 marbles and gets 6 marbles more. How many marbles does Nisha have now?
  25. 25.1 + 10 =
  26. 26.4 + 13 =
  27. 27.1 + 7 =
  28. 28.7 + 7 =
  29. 29.2 + 11 =
  30. 30.17 + 3 =
  31. 31.5 + 8 =
  32. 32.10 + 5 =
  33. 33.There are 9 red flowers and 6 yellow flowers. How many flowers are there in all?
  34. 34.Zoya has 11 marbles and gets 1 marble more. How many marbles does Zoya have now?
  35. 35.There are 4 red flowers and 3 blue flowers. How many flowers are there in all?
  36. 36.There are 10 blue balls and 3 yellow balls. How many balls are there in all?
  37. 37.? + 2 = 6
  38. 38.Karan has 2 bananas and gets 1 banana more. How many bananas does Karan have now?
  39. 39.18 + 2 =
  40. 40.11 + 1 =

Answer key

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

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