Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 112 · 40 sums

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.

1. 1.? + 5 = 6
2. 2.? + 1 = 8
3. 3.There are 10 yellow flowers and 9 green flowers. How many flowers are there in all?
4. 4.7 + 1 =
5. 5.4 + 3 + 8 =
6. 6.4 + 6 + 1 =
7. 7.There are 12 blue kites and 5 red kites. How many kites are there in all?
8. 8.5 + 5 + 4 =
9. 9.3 + 13 =
10. 10.1 + ? = 5
11. 11.7 + 2 =
12. 12.Nisha has 11 books and gets 2 books more. How many books does Nisha have now?
13. 13.4 + 3 + 11 =
14. 14.18 + 2 =
15. 15.There are 7 green flowers and 6 yellow flowers. How many flowers are there in all?
16. 16.1 + 8 + 7 =
17. 17.Rohan has 13 books and gets 2 books more. How many books does Rohan have now?
18. 18.Isha has 8 kites and gets 9 kites more. How many kites does Isha have now?
19. 19.? + 12 = 14
20. 20.1 + 19 =
21. 21.8 + 4 + 5 =
22. 22.There are 4 pink balloons and 10 white balloons. How many balloons are there in all?
23. 23.5 + 11 =
24. 24.Saanvi has 3 balls and gets 5 balls more. How many balls does Saanvi have now?
25. 25.3 + 6 + 7 =
26. 26.6 + 7 + 4 =
27. 27.? + 3 = 4
28. 28.3 + 17 =
29. 29.There are 7 blue beads and 10 pink beads. How many beads are there in all?
30. 30.3 + 14 =
31. 31.7 + 1 + 4 =
32. 32.Pooja has 8 crayons and gets 9 crayons more. How many crayons does Pooja have now?
33. 33.There are 3 white balls and 4 yellow balls. How many balls are there in all?
34. 34.? + 11 = 13
35. 35.12 + 1 =
36. 36.15 + 2 =
37. 37.2 + 7 + 9 =
38. 38.8 + 9 =
39. 39.Ishaan has 2 shells and gets 5 shells more. How many shells does Ishaan have now?
40. 40.4 + 8 + 5 =

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