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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 527 · 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.Kavya has 15 pencils and gets 5 pencils more. How many pencils does Kavya have now?
  2. 2.9 + 7 =
  3. 3.1 + 1 + 18 =
  4. 4.? + 9 = 20
  5. 5.There are 10 blue beads and 8 white beads. How many beads are there in all?
  6. 6.There are 4 pink balloons and 3 white balloons. How many balloons are there in all?
  7. 7.Kavya has 2 bananas and gets 8 bananas more. How many bananas does Kavya have now?
  8. 8.5 + 3 =
  9. 9.There are 6 pink crayons and 5 red crayons. How many crayons are there in all?
  10. 10.19 + 1 =
  11. 11.? + 3 = 12
  12. 12.19 + ? = 20
  13. 13.There are 9 white balloons and 9 red balloons. How many balloons are there in all?
  14. 14.6 + 14 =
  15. 15.1 + ? = 7
  16. 16.4 + 8 =
  17. 17.? + 1 = 18
  18. 18.7 + 8 =
  19. 19.There are 10 red flowers and 7 white flowers. How many flowers are there in all?
  20. 20.7 + 9 =
  21. 21.6 + 4 =
  22. 22.5 + 8 =
  23. 23.1 + 11 =
  24. 24.Rahul has 14 mangoes and gets 1 mango more. How many mangoes does Rahul have now?
  25. 25.6 + 1 =
  26. 26.? + 1 = 3
  27. 27.15 + ? = 16
  28. 28.Gurpreet has 12 crayons and gets 7 crayons more. How many crayons does Gurpreet have now?
  29. 29.10 + 9 =
  30. 30.5 + 5 + 9 =
  31. 31.? + 9 = 10
  32. 32.Priya has 4 mangoes and gets 9 mangoes more. How many mangoes does Priya have now?
  33. 33.7 + 7 + 4 =
  34. 34.15 + ? = 20
  35. 35.8 + 1 + 10 =
  36. 36.8 + 7 =
  37. 37.3 + ? = 9
  38. 38.? + 3 = 18
  39. 39.4 + 2 =
  40. 40.? + 1 = 4

Answer key

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

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