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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 760 · 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. 1.6 + 7 + 5 =
  2. 2.1 + 19 =
  3. 3.? + 2 = 11
  4. 4.? + 5 = 8
  5. 5.6 + ? = 7
  6. 6.12 + ? = 20
  7. 7.4 + 1 + 4 =
  8. 8.6 + 5 + 5 =
  9. 9.13 + 1 =
  10. 10.? + 6 = 20
  11. 11.There are 8 white beads and 11 blue beads. How many beads are there in all?
  12. 12.3 + 7 + 4 =
  13. 13.Vivaan has 13 books and gets 1 book more. How many books does Vivaan have now?
  14. 14.Vivaan has 11 laddoos and gets 2 laddoos more. How many laddoos does Vivaan have now?
  15. 15.There are 10 pink balloons and 6 yellow balloons. How many balloons are there in all?
  16. 16.5 + 3 + 10 =
  17. 17.7 + 4 + 8 =
  18. 18.1 + 2 =
  19. 19.There are 5 red balls and 2 green balls. How many balls are there in all?
  20. 20.8 + 3 + 9 =
  21. 21.3 + ? = 7
  22. 22.10 + ? = 16
  23. 23.There are 7 white crayons and 6 green crayons. How many crayons are there in all?
  24. 24.6 + 3 =
  25. 25.1 + ? = 20
  26. 26.There are 3 blue crayons and 5 pink crayons. How many crayons are there in all?
  27. 27.Arjun has 4 mangoes and gets 2 mangoes more. How many mangoes does Arjun have now?
  28. 28.Pooja has 9 books and gets 2 books more. How many books does Pooja have now?
  29. 29.2 + 8 + 8 =
  30. 30.There are 11 red flowers and 3 blue flowers. How many flowers are there in all?
  31. 31.Aarav has 7 crayons and gets 4 crayons more. How many crayons does Aarav have now?
  32. 32.3 + 17 =
  33. 33.Meera has 10 laddoos and gets 7 laddoos more. How many laddoos does Meera have now?
  34. 34.There are 11 blue flowers and 7 yellow flowers. How many flowers are there in all?
  35. 35.7 + 9 =
  36. 36.8 + 8 + 3 =
  37. 37.There are 4 green crayons and 7 blue crayons. How many crayons are there in all?
  38. 38.5 + 6 =
  39. 39.Riya has 12 marbles and gets 3 marbles more. How many marbles does Riya have now?
  40. 40.Manav has 3 bananas and gets 1 banana more. How many bananas does Manav have now?

Answer key

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

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