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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 544 · 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. 1.801 − 227 =
  2. 2.859 − 305 =
  3. 3.356 − 263 =
  4. 4.A train has 794 people in the front coaches and 153 people in the back coaches. How many people are on the train?
  5. 5.152 + 331 =
  6. 6.718 + 251 =
  7. 7.323 − 273 =
  8. 8.A train has 834 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  9. 9.A train has 560 people in the front coaches and 368 people in the back coaches. How many people are on the train?
  10. 10.760 + 183 =
  11. 11.257 + 293 =
  12. 12.573 − 410 =
  13. 13.? + 315 = 629
  14. 14.341 − 308 =
  15. 15.644 + 240 =
  16. 16.A train has 699 people in the front coaches and 191 people in the back coaches. How many people are on the train?
  17. 17.302 − ? = 95
  18. 18.708 − 451 =
  19. 19.620 + 198 =
  20. 20.114 + 726 =
  21. 21.? + 167 = 593
  22. 22.A train has 856 people in the front coaches and 131 people in the back coaches. How many people are on the train?
  23. 23.A train has 678 people in the front coaches and 279 people in the back coaches. How many people are on the train?
  24. 24.570 + ? = 780
  25. 25.A school has 728 children. 292 of them are girls. How many boys are there?
  26. 26.A school has 560 children. 139 of them are girls. How many boys are there?
  27. 27.? − 465 = 361
  28. 28.615 − 243 =
  29. 29.A train has 357 people in the front coaches and 134 people in the back coaches. How many people are on the train?
  30. 30.202 − ? = 99
  31. 31.A school has 493 children. 324 of them are girls. How many boys are there?
  32. 32.? − 277 = 476
  33. 33.680 + 176 =
  34. 34.? + 167 = 845
  35. 35.? − 159 = 725
  36. 36.? + 588 = 760
  37. 37.A train has 261 people in the front coaches and 270 people in the back coaches. How many people are on the train?
  38. 38.A train has 287 people in the front coaches and 641 people in the back coaches. How many people are on the train?
  39. 39.? − 238 = 28
  40. 40.546 − ? = 192

Answer key

  1. 574
  2. 554
  3. 93
  4. 947
  5. 483
  6. 969
  7. 50
  8. 954
  9. 928
  10. 943
  11. 550
  12. 163
  13. 314
  14. 33
  15. 884
  16. 890
  17. 207
  18. 257
  19. 818
  20. 840
  21. 426
  22. 987
  23. 957
  24. 210
  25. 436
  26. 421
  27. 826
  28. 372
  29. 491
  30. 103
  31. 169
  32. 753
  33. 856
  34. 678
  35. 884
  36. 172
  37. 531
  38. 928
  39. 266
  40. 354

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