Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 788 · 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. 1.14 + 4 =
2. 2.1 + 3 + 12 =
3. 3.2 + 15 =
4. 4.2 + 9 =
5. 5.There are 4 red balloons and 3 pink balloons. How many balloons are there in all?
6. 6.6 + 3 =
7. 7.3 + 3 + 2 =
8. 8.There are 5 yellow balls and 9 white balls. How many balls are there in all?
9. 9.2 + ? = 9
10. 10.10 + 6 =
11. 11.6 + 7 =
12. 12.2 + 6 + 1 =
13. 13.There are 11 blue balls and 5 white balls. How many balls are there in all?
14. 14.Aarav has 3 balloons and gets 10 balloons more. How many balloons does Aarav have now?
15. 15.4 + ? = 17
16. 16.7 + 4 =
17. 17.8 + 6 + 4 =
18. 18.There are 6 green balls and 4 blue balls. How many balls are there in all?
19. 19.? + 3 = 4
20. 20.3 + 5 =
21. 21.2 + 1 =
22. 22.Lakshmi has 13 kites and gets 4 kites more. How many kites does Lakshmi have now?
23. 23.There are 4 yellow beads and 2 red beads. How many beads are there in all?
24. 24.Rahul has 3 crayons and gets 15 crayons more. How many crayons does Rahul have now?
25. 25.? + 1 = 5
26. 26.10 + 5 =
27. 27.There are 8 white balloons and 11 blue balloons. How many balloons are there in all?
28. 28.3 + ? = 4
29. 29.? + 5 = 12
30. 30.? + 10 = 12
31. 31.5 + 2 + 2 =
32. 32.There are 2 red balloons and 16 green balloons. How many balloons are there in all?
33. 33.There are 7 green crayons and 2 blue crayons. How many crayons are there in all?
34. 34.Rahul has 8 balloons and gets 9 balloons more. How many balloons does Rahul have now?
35. 35.18 + ? = 20
36. 36.7 + 7 + 1 =
37. 37.? + 3 = 12
38. 38.16 + 4 =
39. 39.? + 1 = 14
40. 40.Meera has 5 mangoes and gets 8 mangoes more. How many mangoes does Meera have now?

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