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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 19 · 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. 1.6 + 8 + 5 =
  2. 2.There are 7 blue balloons and 7 white balloons. How many balloons are there in all?
  3. 3.? + 7 = 20
  4. 4.15 + ? = 17
  5. 5.Manav has 5 bananas and gets 5 bananas more. How many bananas does Manav have now?
  6. 6.2 + 2 + 6 =
  7. 7.Diya has 7 crayons and gets 8 crayons more. How many crayons does Diya have now?
  8. 8.3 + ? = 11
  9. 9.1 + ? = 7
  10. 10.2 + 3 + 14 =
  11. 11.19 + 1 =
  12. 12.? + 7 = 19
  13. 13.There are 9 yellow flowers and 5 red flowers. How many flowers are there in all?
  14. 14.Vivaan has 12 bananas and gets 7 bananas more. How many bananas does Vivaan have now?
  15. 15.? + 1 = 9
  16. 16.There are 9 yellow balloons and 3 pink balloons. How many balloons are there in all?
  17. 17.1 + 6 + 2 =
  18. 18.6 + 4 + 4 =
  19. 19.3 + 8 + 7 =
  20. 20.Karan has 14 mangoes and gets 5 mangoes more. How many mangoes does Karan have now?
  21. 21.? + 2 = 18
  22. 22.2 + 6 + 8 =
  23. 23.17 + 2 =
  24. 24.? + 3 = 16
  25. 25.13 + 6 =
  26. 26.7 + 5 + 8 =
  27. 27.Vivaan has 6 kites and gets 3 kites more. How many kites does Vivaan have now?
  28. 28.6 + 5 + 4 =
  29. 29.Riya has 5 shells and gets 3 shells more. How many shells does Riya have now?
  30. 30.Riya has 12 crayons and gets 4 crayons more. How many crayons does Riya have now?
  31. 31.Vivaan has 4 balloons and gets 2 balloons more. How many balloons does Vivaan have now?
  32. 32.11 + 1 =
  33. 33.3 + 3 + 12 =
  34. 34.? + 1 = 18
  35. 35.5 + 6 + 4 =
  36. 36.There are 7 red balls and 12 blue balls. How many balls are there in all?
  37. 37.12 + 2 =
  38. 38.There are 12 pink beads and 2 blue beads. How many beads are there in all?
  39. 39.There are 7 pink flowers and 2 red flowers. How many flowers are there in all?
  40. 40.15 + 5 =

Answer key

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

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