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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 328 · 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. 1.600 + ? = 940
  2. 2.251 + 562 =
  3. 3.169 + 581 =
  4. 4.A train has 538 people in the front coaches and 420 people in the back coaches. How many people are on the train?
  5. 5.522 + 352 =
  6. 6.229 + 379 =
  7. 7.? + 271 = 946
  8. 8.A train has 374 people in the front coaches and 482 people in the back coaches. How many people are on the train?
  9. 9.625 + 151 =
  10. 10.497 + 485 =
  11. 11.A train has 561 people in the front coaches and 363 people in the back coaches. How many people are on the train?
  12. 12.464 + 193 =
  13. 13.A train has 383 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  14. 14.517 + 249 =
  15. 15.A train has 474 people in the front coaches and 145 people in the back coaches. How many people are on the train?
  16. 16.A school has 607 children. 167 of them are girls. How many boys are there?
  17. 17.683 − ? = 212
  18. 18.A train has 390 people in the front coaches and 577 people in the back coaches. How many people are on the train?
  19. 19.A train has 774 people in the front coaches and 223 people in the back coaches. How many people are on the train?
  20. 20.620 + ? = 940
  21. 21.374 − ? = 58
  22. 22.A school has 456 children. 125 of them are girls. How many boys are there?
  23. 23.801 + 144 =
  24. 24.101 + ? = 251
  25. 25.A train has 302 people in the front coaches and 194 people in the back coaches. How many people are on the train?
  26. 26.264 + 584 =
  27. 27.619 + 248 =
  28. 28.? − 151 = 701
  29. 29.898 − ? = 741
  30. 30.A train has 715 people in the front coaches and 210 people in the back coaches. How many people are on the train?
  31. 31.A train has 657 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  32. 32.981 − 183 =
  33. 33.? + 444 = 695
  34. 34.378 + 286 =
  35. 35.? + 350 = 662
  36. 36.393 + 395 =
  37. 37.? − 137 = 175
  38. 38.690 − 337 =
  39. 39.A train has 334 people in the front coaches and 198 people in the back coaches. How many people are on the train?
  40. 40.174 + 572 =

Answer key

  1. 340
  2. 813
  3. 750
  4. 958
  5. 874
  6. 608
  7. 675
  8. 856
  9. 776
  10. 982
  11. 924
  12. 657
  13. 577
  14. 766
  15. 619
  16. 440
  17. 471
  18. 967
  19. 997
  20. 320
  21. 316
  22. 331
  23. 945
  24. 150
  25. 496
  26. 848
  27. 867
  28. 852
  29. 157
  30. 925
  31. 801
  32. 798
  33. 251
  34. 664
  35. 312
  36. 788
  37. 312
  38. 353
  39. 532
  40. 746

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