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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 160 · 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. 1.626 − 161 =
  2. 2.442 − 341 =
  3. 3.? − 154 = 246
  4. 4.434 + ? = 638
  5. 5.? + 588 = 823
  6. 6.A school has 882 children. 189 of them are girls. How many boys are there?
  7. 7.691 − 170 =
  8. 8.415 − 310 =
  9. 9.A school has 746 children. 295 of them are girls. How many boys are there?
  10. 10.866 − 577 =
  11. 11.? + 668 = 817
  12. 12.900 − 883 =
  13. 13.289 − ? = 177
  14. 14.648 − 216 =
  15. 15.A school has 259 children. 142 of them are girls. How many boys are there?
  16. 16.740 − ? = 460
  17. 17.A train has 433 people in the front coaches and 196 people in the back coaches. How many people are on the train?
  18. 18.A train has 215 people in the front coaches and 610 people in the back coaches. How many people are on the train?
  19. 19.A train has 368 people in the front coaches and 400 people in the back coaches. How many people are on the train?
  20. 20.211 − 135 =
  21. 21.? + 337 = 497
  22. 22.655 − 438 =
  23. 23.403 − 130 =
  24. 24.A school has 561 children. 292 of them are girls. How many boys are there?
  25. 25.834 + ? = 989
  26. 26.788 + 171 =
  27. 27.803 + 183 =
  28. 28.787 − 598 =
  29. 29.A school has 850 children. 184 of them are girls. How many boys are there?
  30. 30.696 − 305 =
  31. 31.988 − 244 =
  32. 32.A school has 271 children. 209 of them are girls. How many boys are there?
  33. 33.? + 168 = 711
  34. 34.A school has 578 children. 377 of them are girls. How many boys are there?
  35. 35.A train has 105 people in the front coaches and 341 people in the back coaches. How many people are on the train?
  36. 36.312 − 267 =
  37. 37.A train has 805 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  38. 38.297 − 102 =
  39. 39.A train has 135 people in the front coaches and 580 people in the back coaches. How many people are on the train?
  40. 40.A train has 193 people in the front coaches and 108 people in the back coaches. How many people are on the train?

Answer key

  1. 465
  2. 101
  3. 400
  4. 204
  5. 235
  6. 693
  7. 521
  8. 105
  9. 451
  10. 289
  11. 149
  12. 17
  13. 112
  14. 432
  15. 117
  16. 280
  17. 629
  18. 825
  19. 768
  20. 76
  21. 160
  22. 217
  23. 273
  24. 269
  25. 155
  26. 959
  27. 986
  28. 189
  29. 666
  30. 391
  31. 744
  32. 62
  33. 543
  34. 201
  35. 446
  36. 45
  37. 917
  38. 195
  39. 715
  40. 301

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