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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 810 · 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.Kavya has 14 mangoes and gets 3 mangoes more. How many mangoes does Kavya have now?
  2. 2.4 + 9 =
  3. 3.1 + 19 =
  4. 4.? + 6 = 11
  5. 5.19 + 1 =
  6. 6.16 + 4 =
  7. 7.1 + 7 + 12 =
  8. 8.Saanvi has 2 mangoes and gets 1 mango more. How many mangoes does Saanvi have now?
  9. 9.There are 3 pink beads and 6 yellow beads. How many beads are there in all?
  10. 10.Gurpreet has 8 balls and gets 12 balls more. How many balls does Gurpreet have now?
  11. 11.5 + ? = 6
  12. 12.There are 7 pink balloons and 9 blue balloons. How many balloons are there in all?
  13. 13.Manav has 5 pencils and gets 5 pencils more. How many pencils does Manav have now?
  14. 14.5 + 7 + 3 =
  15. 15.There are 2 red beads and 16 white beads. How many beads are there in all?
  16. 16.Sneha has 12 balloons and gets 2 balloons more. How many balloons does Sneha have now?
  17. 17.15 + 4 =
  18. 18.8 + 10 =
  19. 19.18 + 2 =
  20. 20.? + 7 = 8
  21. 21.17 + 1 =
  22. 22.5 + 7 + 6 =
  23. 23.Aarav has 15 pencils and gets 4 pencils more. How many pencils does Aarav have now?
  24. 24.5 + 2 + 13 =
  25. 25.1 + 8 + 11 =
  26. 26.2 + ? = 3
  27. 27.3 + 8 + 3 =
  28. 28.There are 9 white flowers and 9 blue flowers. How many flowers are there in all?
  29. 29.Riya has 13 marbles and gets 6 marbles more. How many marbles does Riya have now?
  30. 30.There are 12 blue crayons and 7 green crayons. How many crayons are there in all?
  31. 31.14 + 6 =
  32. 32.3 + 5 + 6 =
  33. 33.7 + 3 + 1 =
  34. 34.8 + 4 =
  35. 35.13 + ? = 17
  36. 36.1 + 14 =
  37. 37.6 + 10 =
  38. 38.10 + ? = 17
  39. 39.Rohan has 6 balls and gets 4 balls more. How many balls does Rohan have now?
  40. 40.? + 1 = 9

Answer key

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

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