Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 738 · 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. 1.6 + ? = 12
2. 2.There are 3 white balloons and 11 blue balloons. How many balloons are there in all?
3. 3.Vivaan has 9 kites and gets 6 kites more. How many kites does Vivaan have now?
4. 4.? + 14 = 19
5. 5.7 + 2 + 6 =
6. 6.Rahul has 15 books and gets 4 books more. How many books does Rahul have now?
7. 7.1 + ? = 16
8. 8.5 + 8 + 7 =
9. 9.5 + 4 + 3 =
10. 10.6 + ? = 7
11. 11.Tara has 15 mangoes and gets 3 mangoes more. How many mangoes does Tara have now?
12. 12.2 + ? = 5
13. 13.4 + 11 =
14. 14.8 + 4 + 3 =
15. 15.Diya has 7 bananas and gets 11 bananas more. How many bananas does Diya have now?
16. 16.7 + 10 =
17. 17.There are 7 white balloons and 5 yellow balloons. How many balloons are there in all?
18. 18.? + 16 = 19
19. 19.5 + 1 =
20. 20.8 + 3 =
21. 21.2 + ? = 9
22. 22.? + 10 = 15
23. 23.7 + 6 + 1 =
24. 24.There are 3 blue crayons and 12 yellow crayons. How many crayons are there in all?
25. 25.3 + ? = 7
26. 26.Dev has 10 balloons and gets 1 balloon more. How many balloons does Dev have now?
27. 27.6 + 6 + 5 =
28. 28.There are 12 green flowers and 2 blue flowers. How many flowers are there in all?
29. 29.7 + ? = 12
30. 30.2 + ? = 7
31. 31.2 + 7 + 6 =
32. 32.1 + 5 + 7 =
33. 33.4 + 6 =
34. 34.13 + 7 =
35. 35.Sneha has 10 mangoes and gets 7 mangoes more. How many mangoes does Sneha have now?
36. 36.10 + 1 =
37. 37.8 + 12 =
38. 38.11 + ? = 14
39. 39.4 + 6 + 9 =
40. 40.? + 5 = 6

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