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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 600 · 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. 1.5 + 1 + 4 =
  2. 2.Pooja has 8 crayons and gets 6 crayons more. How many crayons does Pooja have now?
  3. 3.8 + 7 + 4 =
  4. 4.There are 4 white crayons and 3 blue crayons. How many crayons are there in all?
  5. 5.1 + 4 + 11 =
  6. 6.? + 11 = 15
  7. 7.15 + 3 =
  8. 8.17 + 3 =
  9. 9.? + 4 = 15
  10. 10.There are 2 blue balloons and 14 white balloons. How many balloons are there in all?
  11. 11.There are 7 pink balls and 12 green balls. How many balls are there in all?
  12. 12.6 + 4 =
  13. 13.Isha has 9 mangoes and gets 5 mangoes more. How many mangoes does Isha have now?
  14. 14.There are 5 green balloons and 10 pink balloons. How many balloons are there in all?
  15. 15.There are 5 red beads and 14 blue beads. How many beads are there in all?
  16. 16.5 + ? = 20
  17. 17.Aditya has 4 crayons and gets 4 crayons more. How many crayons does Aditya have now?
  18. 18.6 + 7 + 4 =
  19. 19.11 + 7 =
  20. 20.9 + 9 =
  21. 21.7 + 6 =
  22. 22.1 + 3 + 1 =
  23. 23.There are 2 white crayons and 14 pink crayons. How many crayons are there in all?
  24. 24.7 + 1 =
  25. 25.8 + 8 + 2 =
  26. 26.There are 9 red balls and 6 green balls. How many balls are there in all?
  27. 27.There are 3 white crayons and 13 blue crayons. How many crayons are there in all?
  28. 28.7 + 3 + 7 =
  29. 29.6 + 5 =
  30. 30.15 + 2 =
  31. 31.2 + 2 =
  32. 32.4 + 5 + 4 =
  33. 33.7 + 6 + 6 =
  34. 34.5 + 3 =
  35. 35.5 + 5 + 4 =
  36. 36.2 + 4 + 7 =
  37. 37.Karan has 6 shells and gets 6 shells more. How many shells does Karan have now?
  38. 38.Isha has 11 books and gets 1 book more. How many books does Isha have now?
  39. 39.Kavya has 8 balloons and gets 6 balloons more. How many balloons does Kavya have now?
  40. 40.8 + 4 + 1 =

Answer key

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

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