Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 27 · 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. 1.1 + 1 + 12 =
2. 2.? + 3 = 12
3. 3.1 + ? = 5
4. 4.? + 2 = 3
5. 5.Arjun has 5 mangoes and gets 8 mangoes more. How many mangoes does Arjun have now?
6. 6.6 + 6 + 1 =
7. 7.Arjun has 10 mangoes and gets 7 mangoes more. How many mangoes does Arjun have now?
8. 8.3 + 15 =
9. 9.4 + 3 + 11 =
10. 10.7 + ? = 12
11. 11.7 + 6 =
12. 12.Pooja has 11 mangoes and gets 7 mangoes more. How many mangoes does Pooja have now?
13. 13.6 + 8 =
14. 14.Karan has 9 balloons and gets 10 balloons more. How many balloons does Karan have now?
15. 15.There are 8 green crayons and 6 pink crayons. How many crayons are there in all?
16. 16.10 + 6 =
17. 17.7 + 5 + 3 =
18. 18.11 + ? = 13
19. 19.7 + 11 =
20. 20.Farhan has 9 flowers and gets 4 flowers more. How many flowers does Farhan have now?
21. 21.Farhan has 5 flowers and gets 10 flowers more. How many flowers does Farhan have now?
22. 22.19 + 1 =
23. 23.7 + 4 + 6 =
24. 24.Gurpreet has 11 flowers and gets 4 flowers more. How many flowers does Gurpreet have now?
25. 25.There are 3 blue crayons and 4 pink crayons. How many crayons are there in all?
26. 26.6 + 4 =
27. 27.2 + ? = 4
28. 28.There are 5 yellow flowers and 6 red flowers. How many flowers are there in all?
29. 29.1 + 5 =
30. 30.3 + 14 =
31. 31.3 + 10 =
32. 32.There are 2 pink flowers and 12 green flowers. How many flowers are there in all?
33. 33.6 + 3 + 8 =
34. 34.1 + ? = 11
35. 35.7 + 13 =
36. 36.There are 7 pink beads and 8 green beads. How many beads are there in all?
37. 37.10 + 3 =
38. 38.2 + 16 =
39. 39.? + 16 = 17
40. 40.6 + 5 + 1 =

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