Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 188 · 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. 1.532 + 292 =
2. 2.323 − 230 =
3. 3.263 + 589 =
4. 4.543 + 193 =
5. 5.A train has 614 people in the front coaches and 102 people in the back coaches. How many people are on the train?
6. 6.A train has 305 people in the front coaches and 248 people in the back coaches. How many people are on the train?
7. 7.A train has 815 people in the front coaches and 129 people in the back coaches. How many people are on the train?
8. 8.557 + 393 =
9. 9.? + 305 = 586
10. 10.564 − 143 =
11. 11.A train has 885 people in the front coaches and 108 people in the back coaches. How many people are on the train?
12. 12.A school has 508 children. 282 of them are girls. How many boys are there?
13. 13.228 + 471 =
14. 14.A school has 476 children. 182 of them are girls. How many boys are there?
15. 15.A train has 682 people in the front coaches and 305 people in the back coaches. How many people are on the train?
16. 16.A train has 634 people in the front coaches and 182 people in the back coaches. How many people are on the train?
17. 17.833 + 149 =
18. 18.? − 297 = 691
19. 19.A school has 846 children. 722 of them are girls. How many boys are there?
20. 20.182 + ? = 459
21. 21.397 − ? = 199
22. 22.331 + 306 =
23. 23.? + 491 = 704
24. 24.? − 477 = 77
25. 25.A train has 128 people in the front coaches and 120 people in the back coaches. How many people are on the train?
26. 26.? + 309 = 613
27. 27.596 + ? = 813
28. 28.? − 432 = 260
29. 29.A school has 357 children. 354 of them are girls. How many boys are there?
30. 30.A school has 917 children. 293 of them are girls. How many boys are there?
31. 31.A train has 134 people in the front coaches and 702 people in the back coaches. How many people are on the train?
32. 32.A train has 412 people in the front coaches and 324 people in the back coaches. How many people are on the train?
33. 33.471 − 361 =
34. 34.A school has 259 children. 151 of them are girls. How many boys are there?
35. 35.876 − ? = 627
36. 36.445 + 318 =
37. 37.547 + 440 =
38. 38.A train has 206 people in the front coaches and 372 people in the back coaches. How many people are on the train?
39. 39.? − 226 = 72
40. 40.130 + 115 =

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