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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 408 · 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 + 5 + 3 =
  2. 2.12 + 5 =
  3. 3.3 + ? = 10
  4. 4.There are 7 yellow kites and 12 pink kites. How many kites are there in all?
  5. 5.4 + 8 + 2 =
  6. 6.There are 11 yellow crayons and 4 white crayons. How many crayons are there in all?
  7. 7.? + 6 = 14
  8. 8.There are 7 red balls and 11 green balls. How many balls are there in all?
  9. 9.Diya has 12 balls and gets 2 balls more. How many balls does Diya have now?
  10. 10.? + 1 = 6
  11. 11.19 + 1 =
  12. 12.14 + 2 =
  13. 13.6 + 4 + 5 =
  14. 14.? + 2 = 4
  15. 15.6 + 7 + 1 =
  16. 16.There are 10 blue balloons and 4 green balloons. How many balloons are there in all?
  17. 17.7 + 3 + 4 =
  18. 18.7 + 1 + 1 =
  19. 19.Dev has 2 mangoes and gets 13 mangoes more. How many mangoes does Dev have now?
  20. 20.14 + 1 =
  21. 21.There are 9 green balls and 7 red balls. How many balls are there in all?
  22. 22.? + 7 = 18
  23. 23.Lakshmi has 10 books and gets 9 books more. How many books does Lakshmi have now?
  24. 24.Ananya has 10 bananas and gets 1 banana more. How many bananas does Ananya have now?
  25. 25.Aarav has 2 balls and gets 16 balls more. How many balls does Aarav have now?
  26. 26.14 + ? = 20
  27. 27.Farhan has 2 crayons and gets 4 crayons more. How many crayons does Farhan have now?
  28. 28.10 + ? = 17
  29. 29.There are 6 yellow balloons and 8 green balloons. How many balloons are there in all?
  30. 30.3 + 5 + 4 =
  31. 31.14 + 3 =
  32. 32.8 + 5 + 2 =
  33. 33.? + 4 = 6
  34. 34.1 + 2 + 14 =
  35. 35.2 + 8 + 4 =
  36. 36.7 + 7 =
  37. 37.2 + 3 + 4 =
  38. 38.There are 9 yellow beads and 7 white beads. How many beads are there in all?
  39. 39.? + 1 = 9
  40. 40.6 + 8 + 4 =

Answer key

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

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