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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 256 · 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. 1.3 + 8 + 4 =
  2. 2.Riya has 15 bananas and gets 5 bananas more. How many bananas does Riya have now?
  3. 3.8 + ? = 11
  4. 4.1 + 3 + 14 =
  5. 5.? + 5 = 11
  6. 6.11 + 1 =
  7. 7.16 + 1 =
  8. 8.2 + 5 + 11 =
  9. 9.? + 7 = 15
  10. 10.3 + 2 + 1 =
  11. 11.Vivaan has 3 flowers and gets 17 flowers more. How many flowers does Vivaan have now?
  12. 12.There are 3 blue balls and 14 white balls. How many balls are there in all?
  13. 13.1 + 1 =
  14. 14.Isha has 3 balls and gets 14 balls more. How many balls does Isha have now?
  15. 15.There are 11 green kites and 9 blue kites. How many kites are there in all?
  16. 16.4 + 6 + 6 =
  17. 17.12 + ? = 17
  18. 18.7 + 8 + 2 =
  19. 19.Meera has 4 kites and gets 1 kite more. How many kites does Meera have now?
  20. 20.There are 10 green beads and 9 white beads. How many beads are there in all?
  21. 21.Sneha has 5 shells and gets 13 shells more. How many shells does Sneha have now?
  22. 22.13 + 2 =
  23. 23.2 + 18 =
  24. 24.There are 12 red balloons and 8 pink balloons. How many balloons are there in all?
  25. 25.? + 8 = 13
  26. 26.Ananya has 3 pencils and gets 1 pencil more. How many pencils does Ananya have now?
  27. 27.There are 12 red balls and 8 green balls. How many balls are there in all?
  28. 28.4 + 7 + 4 =
  29. 29.Dev has 15 crayons and gets 5 crayons more. How many crayons does Dev have now?
  30. 30.? + 3 = 5
  31. 31.? + 13 = 14
  32. 32.Tara has 10 kites and gets 10 kites more. How many kites does Tara have now?
  33. 33.13 + 5 =
  34. 34.Pooja has 2 crayons and gets 4 crayons more. How many crayons does Pooja have now?
  35. 35.1 + 3 =
  36. 36.4 + 8 =
  37. 37.There are 6 blue balloons and 14 green balloons. How many balloons are there in all?
  38. 38.There are 3 red flowers and 2 pink flowers. How many flowers are there in all?
  39. 39.4 + 15 =
  40. 40.8 + ? = 10

Answer key

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

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