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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 411 · 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.? + 1 = 11
  2. 2.2 + ? = 18
  3. 3.4 + 12 =
  4. 4.There are 10 white crayons and 4 pink crayons. How many crayons are there in all?
  5. 5.Vivaan has 9 mangoes and gets 4 mangoes more. How many mangoes does Vivaan have now?
  6. 6.8 + 5 + 4 =
  7. 7.? + 2 = 3
  8. 8.7 + ? = 14
  9. 9.3 + 6 + 3 =
  10. 10.19 + 1 =
  11. 11.There are 11 green crayons and 7 red crayons. How many crayons are there in all?
  12. 12.10 + ? = 20
  13. 13.2 + 5 + 9 =
  14. 14.There are 10 red beads and 9 green beads. How many beads are there in all?
  15. 15.? + 3 = 11
  16. 16.4 + 3 + 2 =
  17. 17.There are 5 blue kites and 15 pink kites. How many kites are there in all?
  18. 18.7 + ? = 9
  19. 19.There are 3 yellow balloons and 12 blue balloons. How many balloons are there in all?
  20. 20.Rohan has 10 pencils and gets 10 pencils more. How many pencils does Rohan have now?
  21. 21.13 + 5 =
  22. 22.There are 8 yellow kites and 2 red kites. How many kites are there in all?
  23. 23.12 + 8 =
  24. 24.Pooja has 5 marbles and gets 6 marbles more. How many marbles does Pooja have now?
  25. 25.12 + ? = 16
  26. 26.There are 6 green balls and 10 yellow balls. How many balls are there in all?
  27. 27.9 + 4 =
  28. 28.Saanvi has 7 marbles and gets 11 marbles more. How many marbles does Saanvi have now?
  29. 29.6 + 6 + 8 =
  30. 30.Lakshmi has 5 kites and gets 2 kites more. How many kites does Lakshmi have now?
  31. 31.? + 8 = 16
  32. 32.Pooja has 4 balls and gets 5 balls more. How many balls does Pooja have now?
  33. 33.? + 10 = 19
  34. 34.Manav has 10 shells and gets 9 shells more. How many shells does Manav have now?
  35. 35.? + 3 = 7
  36. 36.Kavya has 10 kites and gets 4 kites more. How many kites does Kavya have now?
  37. 37.There are 6 green flowers and 12 red flowers. How many flowers are there in all?
  38. 38.There are 5 green kites and 2 blue kites. How many kites are there in all?
  39. 39.8 + ? = 19
  40. 40.Arjun has 9 pencils and gets 8 pencils more. How many pencils does Arjun have now?

Answer key

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

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