Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 608 · 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. 1.2 + 2 + 14 =
2. 2.8 + 2 =
3. 3.There are 2 blue flowers and 5 yellow flowers. How many flowers are there in all?
4. 4.There are 6 red beads and 10 green beads. How many beads are there in all?
5. 5.4 + 6 + 10 =
6. 6.8 + 1 + 3 =
7. 7.Ananya has 14 books and gets 2 books more. How many books does Ananya have now?
8. 8.4 + 6 + 5 =
9. 9.15 + 3 =
10. 10.3 + 5 + 3 =
11. 11.? + 2 = 4
12. 12.12 + 1 =
13. 13.7 + 4 + 9 =
14. 14.There are 3 red crayons and 3 green crayons. How many crayons are there in all?
15. 15.5 + 9 =
16. 16.There are 4 pink beads and 3 blue beads. How many beads are there in all?
17. 17.2 + ? = 7
18. 18.Joseph has 4 mangoes and gets 1 mango more. How many mangoes does Joseph have now?
19. 19.5 + 1 + 12 =
20. 20.8 + 8 + 1 =
21. 21.? + 6 = 9
22. 22.There are 2 pink flowers and 13 red flowers. How many flowers are there in all?
23. 23.11 + ? = 20
24. 24.8 + 4 + 2 =
25. 25.? + 3 = 12
26. 26.Zoya has 2 books and gets 14 books more. How many books does Zoya have now?
27. 27.? + 11 = 17
28. 28.7 + 1 =
29. 29.3 + 2 =
30. 30.Zoya has 10 shells and gets 7 shells more. How many shells does Zoya have now?
31. 31.10 + 5 =
32. 32.12 + 6 =
33. 33.7 + 6 + 5 =
34. 34.16 + 3 =
35. 35.17 + 3 =
36. 36.1 + ? = 8
37. 37.9 + 9 =
38. 38.4 + 8 + 1 =
39. 39.7 + 1 + 5 =
40. 40.2 + 13 =

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