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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 310 · 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 + 4 + 10 =
  2. 2.4 + ? = 11
  3. 3.10 + 2 =
  4. 4.3 + 8 + 8 =
  5. 5.3 + 1 + 6 =
  6. 6.Karan has 4 books and gets 5 books more. How many books does Karan have now?
  7. 7.6 + 7 + 6 =
  8. 8.Meera has 12 balls and gets 6 balls more. How many balls does Meera have now?
  9. 9.Lakshmi has 12 balloons and gets 6 balloons more. How many balloons does Lakshmi have now?
  10. 10.5 + 3 + 6 =
  11. 11.4 + 1 + 3 =
  12. 12.16 + 1 =
  13. 13.There are 10 red balls and 4 white balls. How many balls are there in all?
  14. 14.1 + 7 + 1 =
  15. 15.16 + 2 =
  16. 16.17 + 2 =
  17. 17.Lakshmi has 14 crayons and gets 2 crayons more. How many crayons does Lakshmi have now?
  18. 18.2 + 9 =
  19. 19.? + 1 = 3
  20. 20.13 + ? = 17
  21. 21.Dev has 5 flowers and gets 13 flowers more. How many flowers does Dev have now?
  22. 22.Aarav has 2 laddoos and gets 3 laddoos more. How many laddoos does Aarav have now?
  23. 23.Manav has 4 balls and gets 10 balls more. How many balls does Manav have now?
  24. 24.? + 1 = 7
  25. 25.Manav has 15 bananas and gets 1 banana more. How many bananas does Manav have now?
  26. 26.3 + ? = 18
  27. 27.There are 10 yellow balloons and 6 white balloons. How many balloons are there in all?
  28. 28.7 + 9 =
  29. 29.Rohan has 11 laddoos and gets 5 laddoos more. How many laddoos does Rohan have now?
  30. 30.2 + ? = 4
  31. 31.1 + 2 + 12 =
  32. 32.Kabir has 7 marbles and gets 4 marbles more. How many marbles does Kabir have now?
  33. 33.Isha has 9 balloons and gets 1 balloon more. How many balloons does Isha have now?
  34. 34.There are 4 red balloons and 6 green balloons. How many balloons are there in all?
  35. 35.There are 5 green kites and 5 blue kites. How many kites are there in all?
  36. 36.Ananya has 14 flowers and gets 2 flowers more. How many flowers does Ananya have now?
  37. 37.2 + ? = 20
  38. 38.16 + 4 =
  39. 39.Rohan has 14 shells and gets 2 shells more. How many shells does Rohan have now?
  40. 40.There are 11 pink beads and 4 red beads. How many beads are there in all?

Answer key

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

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