Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 58 · 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. 1.449 − ? = 75
2. 2.505 + 399 =
3. 3.891 − 680 =
4. 4.204 − 152 =
5. 5.326 − 207 =
6. 6.? + 643 = 967
7. 7.? + 323 = 701
8. 8.659 + 319 =
9. 9.906 − ? = 33
10. 10.638 − 583 =
11. 11.715 + ? = 898
12. 12.A school has 267 children. 252 of them are girls. How many boys are there?
13. 13.? + 196 = 358
14. 14.? − 149 = 125
15. 15.? − 519 = 352
16. 16.201 − ? = 68
17. 17.700 − 259 =
18. 18.A train has 277 people in the front coaches and 232 people in the back coaches. How many people are on the train?
19. 19.A train has 399 people in the front coaches and 135 people in the back coaches. How many people are on the train?
20. 20.A school has 639 children. 295 of them are girls. How many boys are there?
21. 21.898 + 101 =
22. 22.181 + 153 =
23. 23.961 − 358 =
24. 24.609 + 247 =
25. 25.A train has 715 people in the front coaches and 113 people in the back coaches. How many people are on the train?
26. 26.144 + ? = 282
27. 27.793 − 584 =
28. 28.A school has 670 children. 133 of them are girls. How many boys are there?
29. 29.937 − 112 =
30. 30.477 + 498 =
31. 31.539 − ? = 172
32. 32.279 + 309 =
33. 33.210 + ? = 349
34. 34.? − 462 = 533
35. 35.555 − ? = 364
36. 36.A train has 247 people in the front coaches and 428 people in the back coaches. How many people are on the train?
37. 37.488 + ? = 818
38. 38.839 + 148 =
39. 39.A train has 563 people in the front coaches and 229 people in the back coaches. How many people are on the train?
40. 40.375 + 132 =

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