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Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 342 · 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 4 yellow balloons and 3 red balloons. How many balloons are there in all?
  2. 2.2 + 3 + 10 =
  3. 3.6 + 14 =
  4. 4.There are 10 white crayons and 8 red crayons. How many crayons are there in all?
  5. 5.Meera has 3 pencils and gets 1 pencil more. How many pencils does Meera have now?
  6. 6.3 + 2 =
  7. 7.There are 11 pink flowers and 9 yellow flowers. How many flowers are there in all?
  8. 8.13 + 2 =
  9. 9.4 + ? = 16
  10. 10.There are 11 yellow beads and 7 pink beads. How many beads are there in all?
  11. 11.5 + 1 =
  12. 12.13 + 6 =
  13. 13.8 + 8 + 1 =
  14. 14.Vivaan has 5 balls and gets 13 balls more. How many balls does Vivaan have now?
  15. 15.Nisha has 11 pencils and gets 2 pencils more. How many pencils does Nisha have now?
  16. 16.1 + ? = 3
  17. 17.There are 9 red balls and 11 yellow balls. How many balls are there in all?
  18. 18.6 + 11 =
  19. 19.2 + 8 + 6 =
  20. 20.12 + 6 =
  21. 21.6 + 10 =
  22. 22.3 + 13 =
  23. 23.4 + 5 + 11 =
  24. 24.8 + 8 + 2 =
  25. 25.There are 11 white flowers and 4 yellow flowers. How many flowers are there in all?
  26. 26.2 + ? = 3
  27. 27.2 + 6 + 4 =
  28. 28.Manav has 2 crayons and gets 6 crayons more. How many crayons does Manav have now?
  29. 29.? + 5 = 11
  30. 30.Riya has 10 mangoes and gets 3 mangoes more. How many mangoes does Riya have now?
  31. 31.11 + 9 =
  32. 32.7 + 8 =
  33. 33.Zoya has 15 crayons and gets 3 crayons more. How many crayons does Zoya have now?
  34. 34.3 + 5 =
  35. 35.12 + 8 =
  36. 36.Isha has 5 mangoes and gets 2 mangoes more. How many mangoes does Isha have now?
  37. 37.? + 10 = 11
  38. 38.5 + 1 + 8 =
  39. 39.4 + 6 + 4 =
  40. 40.4 + 4 + 2 =

Answer key

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

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