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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 630 · 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.Arjun has 5 shells and gets 6 shells more. How many shells does Arjun have now?
  2. 2.8 + 5 + 7 =
  3. 3.Rahul has 10 crayons and gets 10 crayons more. How many crayons does Rahul have now?
  4. 4.There are 6 green flowers and 9 yellow flowers. How many flowers are there in all?
  5. 5.? + 6 = 8
  6. 6.10 + 7 =
  7. 7.3 + ? = 7
  8. 8.3 + 8 + 1 =
  9. 9.2 + ? = 10
  10. 10.4 + 1 + 12 =
  11. 11.1 + 5 + 4 =
  12. 12.Meera has 12 kites and gets 5 kites more. How many kites does Meera have now?
  13. 13.6 + 6 =
  14. 14.? + 5 = 6
  15. 15.Riya has 3 bananas and gets 2 bananas more. How many bananas does Riya have now?
  16. 16.? + 4 = 18
  17. 17.Meera has 14 marbles and gets 5 marbles more. How many marbles does Meera have now?
  18. 18.4 + 1 =
  19. 19.? + 7 = 16
  20. 20.2 + ? = 6
  21. 21.There are 11 white balloons and 2 yellow balloons. How many balloons are there in all?
  22. 22.Kabir has 10 balloons and gets 10 balloons more. How many balloons does Kabir have now?
  23. 23.? + 8 = 18
  24. 24.Kavya has 14 balls and gets 4 balls more. How many balls does Kavya have now?
  25. 25.2 + 3 + 12 =
  26. 26.There are 8 red balloons and 5 pink balloons. How many balloons are there in all?
  27. 27.2 + 1 + 3 =
  28. 28.11 + 1 =
  29. 29.2 + 17 =
  30. 30.Vivaan has 7 shells and gets 7 shells more. How many shells does Vivaan have now?
  31. 31.3 + 8 =
  32. 32.There are 11 pink balls and 5 yellow balls. How many balls are there in all?
  33. 33.7 + 7 =
  34. 34.3 + 12 =
  35. 35.? + 12 = 16
  36. 36.There are 3 yellow beads and 9 pink beads. How many beads are there in all?
  37. 37.? + 7 = 12
  38. 38.There are 4 green balloons and 6 pink balloons. How many balloons are there in all?
  39. 39.6 + 7 =
  40. 40.2 + 5 + 2 =

Answer key

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

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