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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 582 · 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. 1.7 + 7 + 1 =
  2. 2.3 + 2 + 15 =
  3. 3.9 + 3 =
  4. 4.There are 12 white crayons and 6 red crayons. How many crayons are there in all?
  5. 5.6 + 8 + 1 =
  6. 6.6 + ? = 11
  7. 7.1 + 5 + 7 =
  8. 8.16 + 1 =
  9. 9.10 + 7 =
  10. 10.Arjun has 13 bananas and gets 1 banana more. How many bananas does Arjun have now?
  11. 11.There are 3 green balloons and 10 blue balloons. How many balloons are there in all?
  12. 12.19 + ? = 20
  13. 13.? + 2 = 3
  14. 14.? + 7 = 8
  15. 15.? + 1 = 16
  16. 16.6 + 5 + 7 =
  17. 17.There are 5 white kites and 14 green kites. How many kites are there in all?
  18. 18.15 + 2 =
  19. 19.There are 3 green kites and 4 pink kites. How many kites are there in all?
  20. 20.2 + ? = 5
  21. 21.8 + ? = 19
  22. 22.? + 9 = 11
  23. 23.6 + 11 =
  24. 24.There are 6 red beads and 9 yellow beads. How many beads are there in all?
  25. 25.Kavya has 10 books and gets 10 books more. How many books does Kavya have now?
  26. 26.There are 4 pink crayons and 11 red crayons. How many crayons are there in all?
  27. 27.Nisha has 11 laddoos and gets 7 laddoos more. How many laddoos does Nisha have now?
  28. 28.1 + 10 =
  29. 29.Pooja has 9 pencils and gets 8 pencils more. How many pencils does Pooja have now?
  30. 30.8 + 1 + 3 =
  31. 31.There are 6 yellow balloons and 8 red balloons. How many balloons are there in all?
  32. 32.Vivaan has 9 mangoes and gets 4 mangoes more. How many mangoes does Vivaan have now?
  33. 33.4 + 7 + 2 =
  34. 34.12 + 3 =
  35. 35.7 + 2 + 5 =
  36. 36.6 + 1 + 11 =
  37. 37.There are 11 pink balls and 3 red balls. How many balls are there in all?
  38. 38.19 + 1 =
  39. 39.There are 4 white kites and 8 green kites. How many kites are there in all?
  40. 40.18 + 1 =

Answer key

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

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