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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 289 · 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. 1.14 + 5 =
  2. 2.11 + 9 =
  3. 3.1 + 1 + 4 =
  4. 4.There are 7 red balls and 12 green balls. How many balls are there in all?
  5. 5.There are 12 pink kites and 6 yellow kites. How many kites are there in all?
  6. 6.3 + 5 =
  7. 7.18 + 1 =
  8. 8.There are 10 green kites and 3 white kites. How many kites are there in all?
  9. 9.Joseph has 9 marbles and gets 5 marbles more. How many marbles does Joseph have now?
  10. 10.5 + 4 + 1 =
  11. 11.Ishaan has 5 mangoes and gets 7 mangoes more. How many mangoes does Ishaan have now?
  12. 12.? + 1 = 3
  13. 13.Priya has 13 marbles and gets 7 marbles more. How many marbles does Priya have now?
  14. 14.18 + 2 =
  15. 15.8 + 5 + 4 =
  16. 16.16 + 1 =
  17. 17.2 + ? = 6
  18. 18.There are 9 pink flowers and 3 red flowers. How many flowers are there in all?
  19. 19.? + 2 = 17
  20. 20.9 + ? = 15
  21. 21.19 + 1 =
  22. 22.13 + 4 =
  23. 23.5 + 3 + 3 =
  24. 24.Pooja has 3 kites and gets 6 kites more. How many kites does Pooja have now?
  25. 25.17 + 2 =
  26. 26.2 + 1 + 10 =
  27. 27.Dev has 4 pencils and gets 1 pencil more. How many pencils does Dev have now?
  28. 28.There are 3 blue crayons and 6 red crayons. How many crayons are there in all?
  29. 29.There are 3 blue balloons and 8 red balloons. How many balloons are there in all?
  30. 30.8 + 2 + 4 =
  31. 31.Riya has 9 shells and gets 10 shells more. How many shells does Riya have now?
  32. 32.Gurpreet has 11 balls and gets 4 balls more. How many balls does Gurpreet have now?
  33. 33.Karan has 12 shells and gets 3 shells more. How many shells does Karan have now?
  34. 34.7 + 6 + 1 =
  35. 35.There are 10 blue balloons and 4 red balloons. How many balloons are there in all?
  36. 36.There are 6 red balls and 12 blue balls. How many balls are there in all?
  37. 37.11 + 1 =
  38. 38.6 + 8 + 1 =
  39. 39.Ananya has 13 mangoes and gets 6 mangoes more. How many mangoes does Ananya have now?
  40. 40.Kabir has 7 marbles and gets 3 marbles more. How many marbles does Kabir have now?

Answer key

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

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