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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 290 · 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 school has 389 children. 334 of them are girls. How many boys are there?
  2. 2.227 + ? = 891
  3. 3.? + 394 = 940
  4. 4.A school has 379 children. 177 of them are girls. How many boys are there?
  5. 5.A train has 689 people in the front coaches and 128 people in the back coaches. How many people are on the train?
  6. 6.843 − 562 =
  7. 7.A train has 334 people in the front coaches and 223 people in the back coaches. How many people are on the train?
  8. 8.A train has 850 people in the front coaches and 127 people in the back coaches. How many people are on the train?
  9. 9.A school has 512 children. 149 of them are girls. How many boys are there?
  10. 10.341 − 296 =
  11. 11.681 + 175 =
  12. 12.A train has 686 people in the front coaches and 266 people in the back coaches. How many people are on the train?
  13. 13.465 + ? = 720
  14. 14.619 − 594 =
  15. 15.689 − ? = 136
  16. 16.? − 212 = 144
  17. 17.436 − ? = 186
  18. 18.144 + ? = 297
  19. 19.A school has 740 children. 322 of them are girls. How many boys are there?
  20. 20.A school has 705 children. 380 of them are girls. How many boys are there?
  21. 21.A train has 787 people in the front coaches and 123 people in the back coaches. How many people are on the train?
  22. 22.235 − 125 =
  23. 23.905 − ? = 436
  24. 24.460 − 293 =
  25. 25.A train has 581 people in the front coaches and 324 people in the back coaches. How many people are on the train?
  26. 26.A school has 313 children. 154 of them are girls. How many boys are there?
  27. 27.A school has 473 children. 471 of them are girls. How many boys are there?
  28. 28.352 − 159 =
  29. 29.543 − 337 =
  30. 30.644 − 274 =
  31. 31.A train has 122 people in the front coaches and 622 people in the back coaches. How many people are on the train?
  32. 32.? + 326 = 973
  33. 33.A school has 250 children. 150 of them are girls. How many boys are there?
  34. 34.244 + 640 =
  35. 35.? − 175 = 34
  36. 36.736 + ? = 899
  37. 37.A school has 241 children. 222 of them are girls. How many boys are there?
  38. 38.840 − 585 =
  39. 39.A train has 830 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  40. 40.758 − 342 =

Answer key

  1. 55
  2. 664
  3. 546
  4. 202
  5. 817
  6. 281
  7. 557
  8. 977
  9. 363
  10. 45
  11. 856
  12. 952
  13. 255
  14. 25
  15. 553
  16. 356
  17. 250
  18. 153
  19. 418
  20. 325
  21. 910
  22. 110
  23. 469
  24. 167
  25. 905
  26. 159
  27. 2
  28. 193
  29. 206
  30. 370
  31. 744
  32. 647
  33. 100
  34. 884
  35. 209
  36. 163
  37. 19
  38. 255
  39. 939
  40. 416

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