Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 18 · 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. 1.366 + 534 =
2. 2.126 + ? = 519
3. 3.? − 169 = 261
4. 4.279 − 109 =
5. 5.A school has 665 children. 492 of them are girls. How many boys are there?
6. 6.367 − 240 =
7. 7.? − 383 = 1
8. 8.A school has 254 children. 214 of them are girls. How many boys are there?
9. 9.743 − 180 =
10. 10.770 + 101 =
11. 11.363 − 252 =
12. 12.947 − 784 =
13. 13.? − 108 = 148
14. 14.342 − ? = 39
15. 15.A train has 243 people in the front coaches and 101 people in the back coaches. How many people are on the train?
16. 16.626 − ? = 63
17. 17.A train has 655 people in the front coaches and 194 people in the back coaches. How many people are on the train?
18. 18.A train has 223 people in the front coaches and 465 people in the back coaches. How many people are on the train?
19. 19.231 − ? = 71
20. 20.527 + ? = 646
21. 21.A school has 386 children. 158 of them are girls. How many boys are there?
22. 22.310 + 554 =
23. 23.316 + 466 =
24. 24.787 + 129 =
25. 25.742 − 171 =
26. 26.242 − ? = 129
27. 27.764 − 144 =
28. 28.861 + 129 =
29. 29.A school has 370 children. 357 of them are girls. How many boys are there?
30. 30.654 − 559 =
31. 31.125 + 844 =
32. 32.338 + 181 =
33. 33.814 + 185 =
34. 34.576 − ? = 233
35. 35.127 + 145 =
36. 36.A school has 215 children. 202 of them are girls. How many boys are there?
37. 37.A train has 343 people in the front coaches and 283 people in the back coaches. How many people are on the train?
38. 38.143 + 542 =
39. 39.? − 469 = 405
40. 40.? − 477 = 91

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets