Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 23 · 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. 1.8 + 2 =
2. 2.7 + 3 + 3 =
3. 3.There are 7 blue beads and 5 red beads. How many beads are there in all?
4. 4.17 + 1 =
5. 5.14 + 6 =
6. 6.1 + 2 + 12 =
7. 7.12 + 2 =
8. 8.Zoya has 15 balls and gets 3 balls more. How many balls does Zoya have now?
9. 9.? + 2 = 3
10. 10.4 + 9 =
11. 11.7 + 2 =
12. 12.3 + 7 + 10 =
13. 13.1 + 3 + 14 =
14. 14.Karan has 13 marbles and gets 6 marbles more. How many marbles does Karan have now?
15. 15.There are 6 green balls and 4 yellow balls. How many balls are there in all?
16. 16.There are 9 blue balloons and 3 green balloons. How many balloons are there in all?
17. 17.16 + 3 =
18. 18.There are 12 yellow kites and 6 red kites. How many kites are there in all?
19. 19.6 + 8 + 4 =
20. 20.There are 5 pink balls and 4 blue balls. How many balls are there in all?
21. 21.There are 11 white balloons and 7 green balloons. How many balloons are there in all?
22. 22.5 + 5 + 5 =
23. 23.14 + ? = 17
24. 24.Vivaan has 3 pencils and gets 9 pencils more. How many pencils does Vivaan have now?
25. 25.? + 12 = 20
26. 26.There are 4 red balls and 14 pink balls. How many balls are there in all?
27. 27.6 + 2 + 1 =
28. 28.1 + 2 + 6 =
29. 29.7 + 7 + 4 =
30. 30.7 + 1 + 4 =
31. 31.Diya has 11 balls and gets 3 balls more. How many balls does Diya have now?
32. 32.6 + 5 + 7 =
33. 33.Riya has 5 balls and gets 5 balls more. How many balls does Riya have now?
34. 34.2 + 3 =
35. 35.2 + ? = 6
36. 36.13 + 7 =
37. 37.10 + 10 =
38. 38.15 + 1 =
39. 39.2 + 4 =
40. 40.Zoya has 12 flowers and gets 5 flowers more. How many flowers does Zoya have now?

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