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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 876 · 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. 1.2 + 3 + 1 =
  2. 2.There are 9 pink balloons and 5 yellow balloons. How many balloons are there in all?
  3. 3.Karan has 11 marbles and gets 7 marbles more. How many marbles does Karan have now?
  4. 4.? + 1 = 11
  5. 5.2 + 6 + 4 =
  6. 6.There are 9 white balloons and 7 yellow balloons. How many balloons are there in all?
  7. 7.15 + 2 =
  8. 8.6 + 14 =
  9. 9.12 + 4 =
  10. 10.Kavya has 14 mangoes and gets 1 mango more. How many mangoes does Kavya have now?
  11. 11.7 + 7 =
  12. 12.14 + 4 =
  13. 13.? + 2 = 4
  14. 14.1 + 1 =
  15. 15.17 + 1 =
  16. 16.10 + 7 =
  17. 17.? + 17 = 18
  18. 18.8 + 1 =
  19. 19.There are 12 red crayons and 6 blue crayons. How many crayons are there in all?
  20. 20.Meera has 6 balls and gets 13 balls more. How many balls does Meera have now?
  21. 21.There are 9 blue balls and 2 yellow balls. How many balls are there in all?
  22. 22.1 + ? = 5
  23. 23.There are 2 red balls and 6 yellow balls. How many balls are there in all?
  24. 24.Vivaan has 3 shells and gets 16 shells more. How many shells does Vivaan have now?
  25. 25.Karan has 15 flowers and gets 1 flower more. How many flowers does Karan have now?
  26. 26.There are 11 pink crayons and 8 green crayons. How many crayons are there in all?
  27. 27.? + 6 = 11
  28. 28.Rahul has 15 crayons and gets 4 crayons more. How many crayons does Rahul have now?
  29. 29.3 + ? = 9
  30. 30.4 + 8 + 6 =
  31. 31.18 + 2 =
  32. 32.7 + 3 + 3 =
  33. 33.4 + 1 =
  34. 34.? + 2 = 3
  35. 35.4 + 4 + 6 =
  36. 36.Isha has 4 balls and gets 4 balls more. How many balls does Isha have now?
  37. 37.There are 2 yellow flowers and 13 white flowers. How many flowers are there in all?
  38. 38.There are 3 green flowers and 16 pink flowers. How many flowers are there in all?
  39. 39.? + 1 = 3
  40. 40.There are 2 pink crayons and 10 white crayons. How many crayons are there in all?

Answer key

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

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