Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 603 · 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 = 9
2. 2.5 + 1 =
3. 3.12 + ? = 14
4. 4.There are 2 yellow kites and 17 pink kites. How many kites are there in all?
5. 5.There are 9 blue beads and 3 pink beads. How many beads are there in all?
6. 6.4 + 6 + 6 =
7. 7.Saanvi has 4 shells and gets 1 shell more. How many shells does Saanvi have now?
8. 8.? + 1 = 5
9. 9.17 + 2 =
10. 10.3 + ? = 10
11. 11.12 + ? = 16
12. 12.Tara has 2 mangoes and gets 13 mangoes more. How many mangoes does Tara have now?
13. 13.6 + 7 + 1 =
14. 14.12 + ? = 18
15. 15.8 + ? = 14
16. 16.Zoya has 15 bananas and gets 4 bananas more. How many bananas does Zoya have now?
17. 17.Aarav has 4 laddoos and gets 13 laddoos more. How many laddoos does Aarav have now?
18. 18.Rahul has 11 marbles and gets 7 marbles more. How many marbles does Rahul have now?
19. 19.5 + ? = 8
20. 20.5 + ? = 7
21. 21.5 + 2 + 1 =
22. 22.1 + 3 + 3 =
23. 23.? + 1 = 6
24. 24.7 + ? = 8
25. 25.? + 5 = 7
26. 26.There are 11 white beads and 5 yellow beads. How many beads are there in all?
27. 27.1 + 3 + 10 =
28. 28.13 + 4 =
29. 29.? + 12 = 19
30. 30.5 + 1 + 14 =
31. 31.2 + ? = 16
32. 32.There are 7 red balloons and 11 green balloons. How many balloons are there in all?
33. 33.There are 8 yellow crayons and 7 white crayons. How many crayons are there in all?
34. 34.6 + ? = 8
35. 35.3 + 8 + 4 =
36. 36.4 + 5 + 5 =
37. 37.6 + 8 + 3 =
38. 38.8 + 6 + 4 =
39. 39.2 + ? = 4
40. 40.6 + 5 + 3 =

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