Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 141 · 40 sums

The method (Column by column): Line up ones, tens and hundreds. Add from the right; 10 or more → carry 1 to the next column. Subtract from the right; top digit smaller → borrow 1 from the next column. Missing number in an addition = total − the number you know.

1. 1.759 − 612 =
2. 2.A train has 812 people in the front coaches and 162 people in the back coaches. How many people are on the train?
3. 3.A school has 690 children. 474 of them are girls. How many boys are there?
4. 4.665 + ? = 877
5. 5.782 + ? = 978
6. 6.? + 696 = 958
7. 7.852 + 138 =
8. 8.366 − 208 =
9. 9.826 + ? = 997
10. 10.201 − 119 =
11. 11.? − 114 = 455
12. 12.A train has 485 people in the front coaches and 125 people in the back coaches. How many people are on the train?
13. 13.? + 161 = 469
14. 14.237 + 180 =
15. 15.267 − ? = 21
16. 16.? − 494 = 186
17. 17.A train has 327 people in the front coaches and 414 people in the back coaches. How many people are on the train?
18. 18.898 + 100 =
19. 19.208 − 178 =
20. 20.743 − ? = 275
21. 21.807 − 556 =
22. 22.? − 144 = 472
23. 23.878 − 304 =
24. 24.A school has 379 children. 115 of them are girls. How many boys are there?
25. 25.? − 151 = 479
26. 26.871 + 117 =
27. 27.677 + 289 =
28. 28.305 − 210 =
29. 29.742 − ? = 265
30. 30.827 + ? = 940
31. 31.234 − 233 =
32. 32.A school has 487 children. 460 of them are girls. How many boys are there?
33. 33.202 + ? = 621
34. 34.? + 526 = 863
35. 35.? + 578 = 746
36. 36.346 − 217 =
37. 37.A school has 887 children. 456 of them are girls. How many boys are there?
38. 38.A school has 554 children. 134 of them are girls. How many boys are there?
39. 39.A school has 376 children. 367 of them are girls. How many boys are there?
40. 40.? + 411 = 906

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