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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 376 · 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. 1.441 + ? = 544
  2. 2.A school has 916 children. 206 of them are girls. How many boys are there?
  3. 3.A train has 627 people in the front coaches and 118 people in the back coaches. How many people are on the train?
  4. 4.A train has 203 people in the front coaches and 224 people in the back coaches. How many people are on the train?
  5. 5.681 − 618 =
  6. 6.270 − ? = 27
  7. 7.A train has 211 people in the front coaches and 179 people in the back coaches. How many people are on the train?
  8. 8.A train has 242 people in the front coaches and 586 people in the back coaches. How many people are on the train?
  9. 9.A train has 387 people in the front coaches and 234 people in the back coaches. How many people are on the train?
  10. 10.180 + ? = 842
  11. 11.561 − 102 =
  12. 12.587 − 320 =
  13. 13.615 + 185 =
  14. 14.A school has 731 children. 704 of them are girls. How many boys are there?
  15. 15.A train has 418 people in the front coaches and 192 people in the back coaches. How many people are on the train?
  16. 16.735 − 532 =
  17. 17.851 − 160 =
  18. 18.A train has 752 people in the front coaches and 230 people in the back coaches. How many people are on the train?
  19. 19.A school has 810 children. 131 of them are girls. How many boys are there?
  20. 20.A train has 116 people in the front coaches and 128 people in the back coaches. How many people are on the train?
  21. 21.320 + ? = 661
  22. 22.A train has 604 people in the front coaches and 315 people in the back coaches. How many people are on the train?
  23. 23.? + 392 = 533
  24. 24.779 + ? = 958
  25. 25.A school has 207 children. 174 of them are girls. How many boys are there?
  26. 26.? + 575 = 976
  27. 27.? + 741 = 956
  28. 28.A train has 374 people in the front coaches and 616 people in the back coaches. How many people are on the train?
  29. 29.A train has 790 people in the front coaches and 122 people in the back coaches. How many people are on the train?
  30. 30.343 − 290 =
  31. 31.A school has 800 children. 284 of them are girls. How many boys are there?
  32. 32.546 − 327 =
  33. 33.? + 726 = 980
  34. 34.243 − 232 =
  35. 35.? + 359 = 986
  36. 36.884 + ? = 993
  37. 37.A school has 460 children. 370 of them are girls. How many boys are there?
  38. 38.798 + ? = 984
  39. 39.678 − 148 =
  40. 40.617 + 138 =

Answer key

  1. 103
  2. 710
  3. 745
  4. 427
  5. 63
  6. 243
  7. 390
  8. 828
  9. 621
  10. 662
  11. 459
  12. 267
  13. 800
  14. 27
  15. 610
  16. 203
  17. 691
  18. 982
  19. 679
  20. 244
  21. 341
  22. 919
  23. 141
  24. 179
  25. 33
  26. 401
  27. 215
  28. 990
  29. 912
  30. 53
  31. 516
  32. 219
  33. 254
  34. 11
  35. 627
  36. 109
  37. 90
  38. 186
  39. 530
  40. 755

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