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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 763 · 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 521 people in the front coaches and 160 people in the back coaches. How many people are on the train?
  2. 2.A train has 276 people in the front coaches and 653 people in the back coaches. How many people are on the train?
  3. 3.A train has 316 people in the front coaches and 591 people in the back coaches. How many people are on the train?
  4. 4.A school has 791 children. 674 of them are girls. How many boys are there?
  5. 5.309 + 543 =
  6. 6.A school has 806 children. 151 of them are girls. How many boys are there?
  7. 7.? + 202 = 911
  8. 8.A train has 504 people in the front coaches and 242 people in the back coaches. How many people are on the train?
  9. 9.283 − ? = 36
  10. 10.595 − 290 =
  11. 11.A school has 355 children. 103 of them are girls. How many boys are there?
  12. 12.? − 267 = 243
  13. 13.A train has 735 people in the front coaches and 229 people in the back coaches. How many people are on the train?
  14. 14.692 + 304 =
  15. 15.387 + ? = 843
  16. 16.360 − 168 =
  17. 17.303 − ? = 46
  18. 18.811 − 103 =
  19. 19.A train has 409 people in the front coaches and 370 people in the back coaches. How many people are on the train?
  20. 20.630 + ? = 931
  21. 21.823 − 114 =
  22. 22.264 + 274 =
  23. 23.A school has 454 children. 114 of them are girls. How many boys are there?
  24. 24.A school has 570 children. 523 of them are girls. How many boys are there?
  25. 25.A train has 432 people in the front coaches and 237 people in the back coaches. How many people are on the train?
  26. 26.? + 454 = 582
  27. 27.861 − 259 =
  28. 28.A school has 843 children. 424 of them are girls. How many boys are there?
  29. 29.402 − ? = 119
  30. 30.? + 318 = 630
  31. 31.A school has 684 children. 443 of them are girls. How many boys are there?
  32. 32.696 + ? = 895
  33. 33.? + 768 = 943
  34. 34.A train has 130 people in the front coaches and 201 people in the back coaches. How many people are on the train?
  35. 35.513 − 407 =
  36. 36.448 − 347 =
  37. 37.431 − 285 =
  38. 38.642 − 216 =
  39. 39.A train has 561 people in the front coaches and 316 people in the back coaches. How many people are on the train?
  40. 40.? − 750 = 101

Answer key

  1. 681
  2. 929
  3. 907
  4. 117
  5. 852
  6. 655
  7. 709
  8. 746
  9. 247
  10. 305
  11. 252
  12. 510
  13. 964
  14. 996
  15. 456
  16. 192
  17. 257
  18. 708
  19. 779
  20. 301
  21. 709
  22. 538
  23. 340
  24. 47
  25. 669
  26. 128
  27. 602
  28. 419
  29. 283
  30. 312
  31. 241
  32. 199
  33. 175
  34. 331
  35. 106
  36. 101
  37. 146
  38. 426
  39. 877
  40. 851

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