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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 863 · 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 + 6 + 4 =
  2. 2.19 + 1 =
  3. 3.14 + 3 =
  4. 4.6 + 4 + 4 =
  5. 5.6 + 5 + 8 =
  6. 6.5 + 6 + 1 =
  7. 7.10 + ? = 11
  8. 8.Diya has 9 pencils and gets 8 pencils more. How many pencils does Diya have now?
  9. 9.6 + 4 =
  10. 10.14 + ? = 15
  11. 11.16 + 3 =
  12. 12.There are 9 red crayons and 9 white crayons. How many crayons are there in all?
  13. 13.There are 6 pink beads and 14 yellow beads. How many beads are there in all?
  14. 14.3 + 1 + 7 =
  15. 15.There are 4 blue balloons and 2 red balloons. How many balloons are there in all?
  16. 16.Vivaan has 14 bananas and gets 6 bananas more. How many bananas does Vivaan have now?
  17. 17.5 + 6 =
  18. 18.5 + ? = 17
  19. 19.There are 4 yellow balls and 4 green balls. How many balls are there in all?
  20. 20.? + 3 = 15
  21. 21.Rohan has 10 crayons and gets 1 crayon more. How many crayons does Rohan have now?
  22. 22.18 + 2 =
  23. 23.6 + 6 + 6 =
  24. 24.Rohan has 15 kites and gets 3 kites more. How many kites does Rohan have now?
  25. 25.12 + 2 =
  26. 26.There are 3 red flowers and 3 blue flowers. How many flowers are there in all?
  27. 27.12 + 7 =
  28. 28.7 + 2 + 2 =
  29. 29.? + 1 = 7
  30. 30.? + 1 = 10
  31. 31.4 + 8 + 2 =
  32. 32.There are 5 yellow flowers and 6 pink flowers. How many flowers are there in all?
  33. 33.4 + 7 =
  34. 34.There are 12 red flowers and 2 white flowers. How many flowers are there in all?
  35. 35.5 + 2 + 7 =
  36. 36.? + 3 = 16
  37. 37.There are 4 red beads and 3 white beads. How many beads are there in all?
  38. 38.There are 12 red crayons and 3 green crayons. How many crayons are there in all?
  39. 39.There are 9 pink flowers and 4 white flowers. How many flowers are there in all?
  40. 40.2 + 6 + 9 =

Answer key

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

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