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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 768 · 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. 1.2 + 4 + 1 =
  2. 2.2 + 18 =
  3. 3.6 + 1 =
  4. 4.There are 10 white balloons and 5 pink balloons. How many balloons are there in all?
  5. 5.8 + 7 + 5 =
  6. 6.17 + 1 =
  7. 7.There are 5 red flowers and 12 pink flowers. How many flowers are there in all?
  8. 8.There are 9 green kites and 6 pink kites. How many kites are there in all?
  9. 9.9 + 1 =
  10. 10.Pooja has 4 bananas and gets 16 bananas more. How many bananas does Pooja have now?
  11. 11.6 + 5 =
  12. 12.There are 3 red kites and 9 yellow kites. How many kites are there in all?
  13. 13.There are 7 white beads and 7 red beads. How many beads are there in all?
  14. 14.Ananya has 5 mangoes and gets 1 mango more. How many mangoes does Ananya have now?
  15. 15.14 + 1 =
  16. 16.There are 10 green crayons and 4 red crayons. How many crayons are there in all?
  17. 17.13 + 1 =
  18. 18.There are 10 yellow balloons and 9 red balloons. How many balloons are there in all?
  19. 19.There are 10 white balloons and 3 red balloons. How many balloons are there in all?
  20. 20.? + 1 = 9
  21. 21.There are 5 green balls and 13 blue balls. How many balls are there in all?
  22. 22.There are 10 green balloons and 4 blue balloons. How many balloons are there in all?
  23. 23.2 + ? = 5
  24. 24.? + 2 = 4
  25. 25.There are 12 red balls and 8 green balls. How many balls are there in all?
  26. 26.Isha has 6 marbles and gets 3 marbles more. How many marbles does Isha have now?
  27. 27.There are 7 pink crayons and 2 white crayons. How many crayons are there in all?
  28. 28.There are 7 red flowers and 6 white flowers. How many flowers are there in all?
  29. 29.10 + 10 =
  30. 30.There are 9 pink flowers and 11 blue flowers. How many flowers are there in all?
  31. 31.Farhan has 14 pencils and gets 1 pencil more. How many pencils does Farhan have now?
  32. 32.There are 5 pink balloons and 4 yellow balloons. How many balloons are there in all?
  33. 33.There are 8 white balloons and 3 red balloons. How many balloons are there in all?
  34. 34.3 + 2 + 11 =
  35. 35.16 + 4 =
  36. 36.? + 5 = 10
  37. 37.2 + ? = 10
  38. 38.16 + 3 =
  39. 39.3 + 7 + 3 =
  40. 40.8 + 5 + 5 =

Answer key

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

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