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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 168 · 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. 1.10 + 1 =
  2. 2.2 + 4 =
  3. 3.? + 3 = 7
  4. 4.14 + 6 =
  5. 5.There are 2 yellow flowers and 15 green flowers. How many flowers are there in all?
  6. 6.2 + ? = 4
  7. 7.3 + 5 + 1 =
  8. 8.Rahul has 11 balls and gets 9 balls more. How many balls does Rahul have now?
  9. 9.4 + 2 + 4 =
  10. 10.Ishaan has 4 shells and gets 6 shells more. How many shells does Ishaan have now?
  11. 11.5 + 7 =
  12. 12.Aarav has 14 books and gets 6 books more. How many books does Aarav have now?
  13. 13.Nisha has 4 mangoes and gets 7 mangoes more. How many mangoes does Nisha have now?
  14. 14.There are 7 red beads and 4 green beads. How many beads are there in all?
  15. 15.Saanvi has 9 marbles and gets 4 marbles more. How many marbles does Saanvi have now?
  16. 16.9 + ? = 16
  17. 17.There are 5 red flowers and 13 yellow flowers. How many flowers are there in all?
  18. 18.18 + 2 =
  19. 19.Isha has 6 kites and gets 12 kites more. How many kites does Isha have now?
  20. 20.? + 7 = 12
  21. 21.There are 8 red balls and 11 white balls. How many balls are there in all?
  22. 22.5 + ? = 8
  23. 23.Aditya has 3 books and gets 13 books more. How many books does Aditya have now?
  24. 24.? + 4 = 15
  25. 25.12 + 8 =
  26. 26.There are 8 red balls and 5 pink balls. How many balls are there in all?
  27. 27.? + 3 = 4
  28. 28.2 + 6 + 2 =
  29. 29.Ananya has 15 balls and gets 5 balls more. How many balls does Ananya have now?
  30. 30.15 + 4 =
  31. 31.Gurpreet has 11 flowers and gets 2 flowers more. How many flowers does Gurpreet have now?
  32. 32.Manav has 11 marbles and gets 8 marbles more. How many marbles does Manav have now?
  33. 33.6 + 8 + 6 =
  34. 34.3 + 9 =
  35. 35.1 + 4 + 3 =
  36. 36.? + 1 = 3
  37. 37.? + 7 = 11
  38. 38.1 + 4 + 9 =
  39. 39.Priya has 4 books and gets 3 books more. How many books does Priya have now?
  40. 40.16 + 1 =

Answer key

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

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