Class 1 Maths Worksheet: Addition

Maths worksheets lesson 3: Addition up to 20 · Set 176 · 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 + 11 =
2. 2.11 + 2 =
3. 3.3 + 4 + 10 =
4. 4.Vivaan has 3 mangoes and gets 12 mangoes more. How many mangoes does Vivaan have now?
5. 5.7 + ? = 20
6. 6.Isha has 13 pencils and gets 4 pencils more. How many pencils does Isha have now?
7. 7.Diya has 7 balloons and gets 12 balloons more. How many balloons does Diya have now?
8. 8.There are 5 pink flowers and 10 blue flowers. How many flowers are there in all?
9. 9.5 + 8 + 1 =
10. 10.6 + 2 + 7 =
11. 11.Rohan has 5 balls and gets 10 balls more. How many balls does Rohan have now?
12. 12.There are 9 red crayons and 4 yellow crayons. How many crayons are there in all?
13. 13.4 + 6 + 5 =
14. 14.6 + 8 =
15. 15.1 + 15 =
16. 16.? + 3 = 4
17. 17.? + 12 = 14
18. 18.1 + 3 + 2 =
19. 19.1 + 14 =
20. 20.11 + 1 =
21. 21.? + 5 = 12
22. 22.7 + 6 + 2 =
23. 23.12 + 4 =
24. 24.5 + 2 + 9 =
25. 25.2 + 3 + 11 =
26. 26.2 + 4 + 12 =
27. 27.There are 7 yellow kites and 13 pink kites. How many kites are there in all?
28. 28.There are 9 pink crayons and 9 white crayons. How many crayons are there in all?
29. 29.? + 9 = 17
30. 30.12 + 1 =
31. 31.4 + 3 + 1 =
32. 32.? + 13 = 19
33. 33.1 + ? = 7
34. 34.1 + 7 + 11 =
35. 35.7 + 7 =
36. 36.3 + ? = 10
37. 37.18 + 2 =
38. 38.There are 12 yellow balloons and 3 red balloons. How many balloons are there in all?
39. 39.Tara has 5 laddoos and gets 10 laddoos more. How many laddoos does Tara have now?
40. 40.2 + 15 =

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