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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 416 · 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 + ? = 14
  2. 2.Riya has 3 mangoes and gets 9 mangoes more. How many mangoes does Riya have now?
  3. 3.6 + 2 + 10 =
  4. 4.7 + 12 =
  5. 5.8 + 5 =
  6. 6.Ishaan has 14 marbles and gets 3 marbles more. How many marbles does Ishaan have now?
  7. 7.8 + ? = 10
  8. 8.4 + ? = 7
  9. 9.8 + 7 + 5 =
  10. 10.7 + 8 + 2 =
  11. 11.There are 8 yellow beads and 10 blue beads. How many beads are there in all?
  12. 12.Arjun has 7 marbles and gets 8 marbles more. How many marbles does Arjun have now?
  13. 13.4 + 8 =
  14. 14.5 + 3 =
  15. 15.17 + 1 =
  16. 16.5 + ? = 7
  17. 17.There are 11 yellow flowers and 4 blue flowers. How many flowers are there in all?
  18. 18.14 + 4 =
  19. 19.Aditya has 9 books and gets 4 books more. How many books does Aditya have now?
  20. 20.14 + 3 =
  21. 21.There are 8 green balloons and 10 blue balloons. How many balloons are there in all?
  22. 22.1 + 12 =
  23. 23.Karan has 15 bananas and gets 1 banana more. How many bananas does Karan have now?
  24. 24.3 + 2 + 10 =
  25. 25.15 + 4 =
  26. 26.There are 6 yellow crayons and 5 blue crayons. How many crayons are there in all?
  27. 27.There are 8 blue beads and 5 pink beads. How many beads are there in all?
  28. 28.There are 6 white crayons and 11 blue crayons. How many crayons are there in all?
  29. 29.6 + 8 + 4 =
  30. 30.2 + 3 =
  31. 31.There are 2 red crayons and 4 green crayons. How many crayons are there in all?
  32. 32.Ishaan has 3 balls and gets 16 balls more. How many balls does Ishaan have now?
  33. 33.Vivaan has 4 laddoos and gets 5 laddoos more. How many laddoos does Vivaan have now?
  34. 34.14 + 2 =
  35. 35.There are 11 white balloons and 6 green balloons. How many balloons are there in all?
  36. 36.Priya has 15 balloons and gets 5 balloons more. How many balloons does Priya have now?
  37. 37.There are 12 green balls and 4 yellow balls. How many balls are there in all?
  38. 38.There are 5 blue balls and 4 white balls. How many balls are there in all?
  39. 39.2 + 2 + 2 =
  40. 40.? + 11 = 19

Answer key

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

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