Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 72 · 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.A train has 896 people in the front coaches and 103 people in the back coaches. How many people are on the train?
2. 2.315 − 131 =
3. 3.905 − 762 =
4. 4.A school has 300 children. 121 of them are girls. How many boys are there?
5. 5.693 + 262 =
6. 6.935 − 321 =
7. 7.A school has 783 children. 387 of them are girls. How many boys are there?
8. 8.A train has 384 people in the front coaches and 261 people in the back coaches. How many people are on the train?
9. 9.A train has 130 people in the front coaches and 118 people in the back coaches. How many people are on the train?
10. 10.A train has 500 people in the front coaches and 411 people in the back coaches. How many people are on the train?
11. 11.308 + ? = 690
12. 12.477 + ? = 920
13. 13.A train has 654 people in the front coaches and 228 people in the back coaches. How many people are on the train?
14. 14.147 + 708 =
15. 15.? + 659 = 882
16. 16.A train has 653 people in the front coaches and 313 people in the back coaches. How many people are on the train?
17. 17.A school has 880 children. 195 of them are girls. How many boys are there?
18. 18.A train has 600 people in the front coaches and 109 people in the back coaches. How many people are on the train?
19. 19.343 − 175 =
20. 20.A train has 897 people in the front coaches and 100 people in the back coaches. How many people are on the train?
21. 21.458 + 483 =
22. 22.673 + 186 =
23. 23.272 + ? = 459
24. 24.609 − 458 =
25. 25.813 − 422 =
26. 26.614 + ? = 842
27. 27.293 + 404 =
28. 28.254 + ? = 453
29. 29.205 + ? = 306
30. 30.515 − ? = 407
31. 31.A train has 860 people in the front coaches and 132 people in the back coaches. How many people are on the train?
32. 32.A train has 461 people in the front coaches and 199 people in the back coaches. How many people are on the train?
33. 33.983 − ? = 497
34. 34.881 − 537 =
35. 35.214 − 132 =
36. 36.404 + 474 =
37. 37.A train has 200 people in the front coaches and 773 people in the back coaches. How many people are on the train?
38. 38.593 − 381 =
39. 39.243 − 130 =
40. 40.A train has 834 people in the front coaches and 116 people in the back coaches. How many people are on the train?

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