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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 502 · 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.Dev has 10 mangoes and gets 3 mangoes more. How many mangoes does Dev have now?
  2. 2.1 + 19 =
  3. 3.5 + ? = 8
  4. 4.? + 14 = 15
  5. 5.Arjun has 6 marbles and gets 6 marbles more. How many marbles does Arjun have now?
  6. 6.5 + 5 =
  7. 7.2 + ? = 8
  8. 8.12 + 1 =
  9. 9.There are 10 blue flowers and 8 white flowers. How many flowers are there in all?
  10. 10.There are 5 white crayons and 2 blue crayons. How many crayons are there in all?
  11. 11.8 + 5 + 5 =
  12. 12.2 + 5 =
  13. 13.5 + 5 + 4 =
  14. 14.There are 11 red balls and 4 green balls. How many balls are there in all?
  15. 15.9 + ? = 11
  16. 16.17 + 3 =
  17. 17.1 + 7 + 5 =
  18. 18.12 + 4 =
  19. 19.Priya has 3 balls and gets 9 balls more. How many balls does Priya have now?
  20. 20.There are 10 red balls and 2 yellow balls. How many balls are there in all?
  21. 21.There are 3 blue beads and 6 pink beads. How many beads are there in all?
  22. 22.There are 11 white balls and 2 yellow balls. How many balls are there in all?
  23. 23.? + 11 = 20
  24. 24.9 + 2 =
  25. 25.Farhan has 13 crayons and gets 5 crayons more. How many crayons does Farhan have now?
  26. 26.There are 12 yellow balloons and 3 blue balloons. How many balloons are there in all?
  27. 27.There are 2 white balls and 14 yellow balls. How many balls are there in all?
  28. 28.Rohan has 15 mangoes and gets 5 mangoes more. How many mangoes does Rohan have now?
  29. 29.5 + 11 =
  30. 30.Ananya has 2 pencils and gets 16 pencils more. How many pencils does Ananya have now?
  31. 31.6 + 4 + 8 =
  32. 32.3 + 3 + 4 =
  33. 33.10 + ? = 20
  34. 34.Priya has 14 pencils and gets 5 pencils more. How many pencils does Priya have now?
  35. 35.4 + 3 =
  36. 36.There are 11 pink kites and 8 yellow kites. How many kites are there in all?
  37. 37.1 + ? = 5
  38. 38.2 + 2 + 12 =
  39. 39.There are 7 green crayons and 12 red crayons. How many crayons are there in all?
  40. 40.2 + 3 + 10 =

Answer key

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

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