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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 291 · 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 160 people in the front coaches and 414 people in the back coaches. How many people are on the train?
  2. 2.724 − 602 =
  3. 3.A train has 848 people in the front coaches and 114 people in the back coaches. How many people are on the train?
  4. 4.A train has 293 people in the front coaches and 399 people in the back coaches. How many people are on the train?
  5. 5.619 − 154 =
  6. 6.A train has 160 people in the front coaches and 541 people in the back coaches. How many people are on the train?
  7. 7.554 − 311 =
  8. 8.A train has 316 people in the front coaches and 275 people in the back coaches. How many people are on the train?
  9. 9.A school has 232 children. 177 of them are girls. How many boys are there?
  10. 10.A school has 919 children. 794 of them are girls. How many boys are there?
  11. 11.A train has 870 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  12. 12.364 − 344 =
  13. 13.A train has 650 people in the front coaches and 286 people in the back coaches. How many people are on the train?
  14. 14.891 + 108 =
  15. 15.251 − 124 =
  16. 16.680 + ? = 940
  17. 17.431 + 421 =
  18. 18.A school has 558 children. 529 of them are girls. How many boys are there?
  19. 19.323 − 124 =
  20. 20.213 − 177 =
  21. 21.A school has 434 children. 249 of them are girls. How many boys are there?
  22. 22.242 + 698 =
  23. 23.A school has 250 children. 151 of them are girls. How many boys are there?
  24. 24.660 + 299 =
  25. 25.299 + 211 =
  26. 26.A school has 869 children. 491 of them are girls. How many boys are there?
  27. 27.A school has 422 children. 304 of them are girls. How many boys are there?
  28. 28.461 − 114 =
  29. 29.777 + 180 =
  30. 30.? − 228 = 529
  31. 31.A school has 528 children. 369 of them are girls. How many boys are there?
  32. 32.295 − ? = 121
  33. 33.727 + ? = 928
  34. 34.A train has 473 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  35. 35.584 − ? = 155
  36. 36.124 + 772 =
  37. 37.884 + 101 =
  38. 38.680 − 671 =
  39. 39.290 + 611 =
  40. 40.? − 101 = 284

Answer key

  1. 574
  2. 122
  3. 962
  4. 692
  5. 465
  6. 701
  7. 243
  8. 591
  9. 55
  10. 125
  11. 993
  12. 20
  13. 936
  14. 999
  15. 127
  16. 260
  17. 852
  18. 29
  19. 199
  20. 36
  21. 185
  22. 940
  23. 99
  24. 959
  25. 510
  26. 378
  27. 118
  28. 347
  29. 957
  30. 757
  31. 159
  32. 174
  33. 201
  34. 691
  35. 429
  36. 896
  37. 985
  38. 9
  39. 901
  40. 385

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