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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 237 · 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. 1.4 + ? = 16
  2. 2.12 + 1 =
  3. 3.5 + 1 + 8 =
  4. 4.18 + 1 =
  5. 5.? + 3 = 8
  6. 6.1 + 12 =
  7. 7.? + 5 = 20
  8. 8.3 + 5 =
  9. 9.6 + ? = 17
  10. 10.6 + 8 + 5 =
  11. 11.Saanvi has 14 mangoes and gets 5 mangoes more. How many mangoes does Saanvi have now?
  12. 12.Lakshmi has 6 crayons and gets 8 crayons more. How many crayons does Lakshmi have now?
  13. 13.There are 11 blue balls and 5 white balls. How many balls are there in all?
  14. 14.Kavya has 15 pencils and gets 2 pencils more. How many pencils does Kavya have now?
  15. 15.15 + 1 =
  16. 16.8 + 3 =
  17. 17.6 + 1 + 9 =
  18. 18.Diya has 15 shells and gets 3 shells more. How many shells does Diya have now?
  19. 19.Rahul has 13 pencils and gets 4 pencils more. How many pencils does Rahul have now?
  20. 20.7 + 3 + 4 =
  21. 21.Karan has 12 bananas and gets 1 banana more. How many bananas does Karan have now?
  22. 22.5 + 2 + 7 =
  23. 23.Meera has 4 marbles and gets 9 marbles more. How many marbles does Meera have now?
  24. 24.8 + ? = 12
  25. 25.19 + 1 =
  26. 26.There are 9 blue balloons and 11 red balloons. How many balloons are there in all?
  27. 27.3 + 6 + 9 =
  28. 28.1 + ? = 11
  29. 29.? + 3 = 7
  30. 30.3 + 2 + 8 =
  31. 31.17 + 1 =
  32. 32.10 + ? = 11
  33. 33.? + 5 = 7
  34. 34.There are 9 white crayons and 8 blue crayons. How many crayons are there in all?
  35. 35.There are 11 pink balloons and 9 red balloons. How many balloons are there in all?
  36. 36.16 + 1 =
  37. 37.5 + ? = 8
  38. 38.Tara has 3 marbles and gets 11 marbles more. How many marbles does Tara have now?
  39. 39.1 + ? = 5
  40. 40.3 + 1 + 8 =

Answer key

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

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