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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 45 · 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.There are 7 green balloons and 4 blue balloons. How many balloons are there in all?
  2. 2.2 + 8 + 3 =
  3. 3.5 + 12 =
  4. 4.1 + 5 + 6 =
  5. 5.There are 11 red balloons and 2 pink balloons. How many balloons are there in all?
  6. 6.Diya has 2 bananas and gets 14 bananas more. How many bananas does Diya have now?
  7. 7.5 + 2 + 5 =
  8. 8.8 + 3 + 9 =
  9. 9.19 + 1 =
  10. 10.5 + 2 + 2 =
  11. 11.Kavya has 13 balls and gets 6 balls more. How many balls does Kavya have now?
  12. 12.3 + 9 =
  13. 13.Arjun has 11 bananas and gets 9 bananas more. How many bananas does Arjun have now?
  14. 14.8 + 10 =
  15. 15.1 + ? = 7
  16. 16.Nisha has 9 mangoes and gets 3 mangoes more. How many mangoes does Nisha have now?
  17. 17.8 + ? = 9
  18. 18.3 + 5 + 5 =
  19. 19.There are 8 green balls and 11 yellow balls. How many balls are there in all?
  20. 20.16 + 3 =
  21. 21.13 + 4 =
  22. 22.10 + 8 =
  23. 23.4 + 13 =
  24. 24.There are 5 white balloons and 3 blue balloons. How many balloons are there in all?
  25. 25.1 + 1 =
  26. 26.4 + 2 =
  27. 27.10 + 2 =
  28. 28.7 + 3 + 7 =
  29. 29.18 + 2 =
  30. 30.15 + 5 =
  31. 31.Lakshmi has 8 flowers and gets 4 flowers more. How many flowers does Lakshmi have now?
  32. 32.There are 7 white balloons and 12 red balloons. How many balloons are there in all?
  33. 33.There are 9 yellow balloons and 9 blue balloons. How many balloons are there in all?
  34. 34.Arjun has 2 balls and gets 3 balls more. How many balls does Arjun have now?
  35. 35.6 + 8 =
  36. 36.There are 2 blue crayons and 9 white crayons. How many crayons are there in all?
  37. 37.? + 1 = 5
  38. 38.13 + ? = 14
  39. 39.There are 7 blue balloons and 8 white balloons. How many balloons are there in all?
  40. 40.Zoya has 4 balloons and gets 16 balloons more. How many balloons does Zoya have now?

Answer key

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

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