← 3-digit addition and subtraction lesson New set →

Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 228 · 40 sums
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.A train has 165 people in the front coaches and 530 people in the back coaches. How many people are on the train?
  2. 2.A train has 429 people in the front coaches and 507 people in the back coaches. How many people are on the train?
  3. 3.156 + 482 =
  4. 4.A train has 738 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  5. 5.A train has 258 people in the front coaches and 247 people in the back coaches. How many people are on the train?
  6. 6.822 − 499 =
  7. 7.221 − ? = 44
  8. 8.? + 419 = 994
  9. 9.698 + 261 =
  10. 10.A school has 527 children. 499 of them are girls. How many boys are there?
  11. 11.399 + ? = 799
  12. 12.574 − 225 =
  13. 13.A train has 549 people in the front coaches and 430 people in the back coaches. How many people are on the train?
  14. 14.A train has 227 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  15. 15.A school has 215 children. 123 of them are girls. How many boys are there?
  16. 16.246 − 212 =
  17. 17.A train has 292 people in the front coaches and 113 people in the back coaches. How many people are on the train?
  18. 18.351 + ? = 710
  19. 19.491 − 177 =
  20. 20.527 − 322 =
  21. 21.A train has 759 people in the front coaches and 240 people in the back coaches. How many people are on the train?
  22. 22.? − 265 = 15
  23. 23.? + 193 = 515
  24. 24.827 − 208 =
  25. 25.422 + 373 =
  26. 26.A school has 666 children. 120 of them are girls. How many boys are there?
  27. 27.? − 212 = 24
  28. 28.A train has 740 people in the front coaches and 210 people in the back coaches. How many people are on the train?
  29. 29.752 − ? = 450
  30. 30.857 − 492 =
  31. 31.990 − 899 =
  32. 32.? + 224 = 888
  33. 33.? − 343 = 372
  34. 34.A school has 870 children. 484 of them are girls. How many boys are there?
  35. 35.? + 865 = 987
  36. 36.812 + ? = 990
  37. 37.A school has 371 children. 147 of them are girls. How many boys are there?
  38. 38.A train has 260 people in the front coaches and 667 people in the back coaches. How many people are on the train?
  39. 39.A train has 582 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  40. 40.? + 726 = 954

Answer key

  1. 695
  2. 936
  3. 638
  4. 874
  5. 505
  6. 323
  7. 177
  8. 575
  9. 959
  10. 28
  11. 400
  12. 349
  13. 979
  14. 379
  15. 92
  16. 34
  17. 405
  18. 359
  19. 314
  20. 205
  21. 999
  22. 280
  23. 322
  24. 619
  25. 795
  26. 546
  27. 236
  28. 950
  29. 302
  30. 365
  31. 91
  32. 664
  33. 715
  34. 386
  35. 122
  36. 178
  37. 224
  38. 927
  39. 761
  40. 228

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