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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 859 · 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. 1.5 + 12 =
  2. 2.6 + 12 =
  3. 3.7 + 4 =
  4. 4.There are 12 green flowers and 3 pink flowers. How many flowers are there in all?
  5. 5.? + 1 = 18
  6. 6.10 + ? = 19
  7. 7.8 + 2 =
  8. 8.Meera has 4 shells and gets 2 shells more. How many shells does Meera have now?
  9. 9.? + 10 = 12
  10. 10.3 + 15 =
  11. 11.5 + 8 + 1 =
  12. 12.1 + 7 + 11 =
  13. 13.1 + 1 + 12 =
  14. 14.There are 4 red beads and 10 yellow beads. How many beads are there in all?
  15. 15.? + 15 = 16
  16. 16.There are 12 yellow flowers and 5 green flowers. How many flowers are there in all?
  17. 17.5 + 1 + 11 =
  18. 18.There are 11 blue kites and 4 white kites. How many kites are there in all?
  19. 19.6 + 10 =
  20. 20.Tara has 2 balloons and gets 17 balloons more. How many balloons does Tara have now?
  21. 21.There are 3 red balls and 15 yellow balls. How many balls are there in all?
  22. 22.There are 10 green balloons and 9 red balloons. How many balloons are there in all?
  23. 23.There are 7 red beads and 11 white beads. How many beads are there in all?
  24. 24.There are 10 pink crayons and 3 white crayons. How many crayons are there in all?
  25. 25.Riya has 4 marbles and gets 15 marbles more. How many marbles does Riya have now?
  26. 26.2 + 7 + 9 =
  27. 27.? + 4 = 5
  28. 28.5 + 4 + 1 =
  29. 29.? + 2 = 4
  30. 30.3 + 2 + 10 =
  31. 31.8 + 2 + 4 =
  32. 32.6 + 5 =
  33. 33.There are 7 red flowers and 9 white flowers. How many flowers are there in all?
  34. 34.3 + 6 + 4 =
  35. 35.There are 2 pink kites and 4 green kites. How many kites are there in all?
  36. 36.5 + 7 + 2 =
  37. 37.9 + 7 =
  38. 38.? + 2 = 3
  39. 39.There are 5 green kites and 15 white kites. How many kites are there in all?
  40. 40.3 + 3 + 1 =

Answer key

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

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