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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 1 · 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.There are 8 red beads and 2 green beads. How many beads are there in all?
  2. 2.11 + ? = 15
  3. 3.There are 8 pink balloons and 10 green balloons. How many balloons are there in all?
  4. 4.15 + 5 =
  5. 5.4 + ? = 11
  6. 6.1 + 6 =
  7. 7.There are 5 blue balloons and 10 pink balloons. How many balloons are there in all?
  8. 8.18 + 2 =
  9. 9.There are 11 yellow beads and 8 green beads. How many beads are there in all?
  10. 10.There are 9 yellow crayons and 2 blue crayons. How many crayons are there in all?
  11. 11.There are 8 red balls and 9 yellow balls. How many balls are there in all?
  12. 12.? + 8 = 16
  13. 13.7 + 5 + 1 =
  14. 14.8 + 7 + 4 =
  15. 15.Saanvi has 7 mangoes and gets 1 mango more. How many mangoes does Saanvi have now?
  16. 16.? + 5 = 12
  17. 17.There are 3 red flowers and 14 yellow flowers. How many flowers are there in all?
  18. 18.5 + 4 =
  19. 19.Zoya has 8 shells and gets 5 shells more. How many shells does Zoya have now?
  20. 20.4 + 5 + 10 =
  21. 21.Riya has 6 kites and gets 12 kites more. How many kites does Riya have now?
  22. 22.6 + 6 + 2 =
  23. 23.? + 3 = 19
  24. 24.There are 3 blue balloons and 17 green balloons. How many balloons are there in all?
  25. 25.Isha has 6 flowers and gets 2 flowers more. How many flowers does Isha have now?
  26. 26.? + 11 = 15
  27. 27.Karan has 6 balloons and gets 9 balloons more. How many balloons does Karan have now?
  28. 28.Aarav has 13 balls and gets 4 balls more. How many balls does Aarav have now?
  29. 29.3 + 7 =
  30. 30.5 + 2 + 10 =
  31. 31.Isha has 2 pencils and gets 1 pencil more. How many pencils does Isha have now?
  32. 32.4 + 4 + 8 =
  33. 33.7 + 3 =
  34. 34.There are 5 pink flowers and 14 green flowers. How many flowers are there in all?
  35. 35.6 + 6 + 7 =
  36. 36.1 + 12 =
  37. 37.16 + 2 =
  38. 38.8 + 10 =
  39. 39.There are 2 pink flowers and 13 white flowers. How many flowers are there in all?
  40. 40.15 + 2 =

Answer key

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

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