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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 355 · 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. 1.440 + 134 =
  2. 2.407 − ? = 108
  3. 3.? − 737 = 172
  4. 4.A train has 747 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  5. 5.396 − 153 =
  6. 6.154 + 572 =
  7. 7.A train has 793 people in the front coaches and 156 people in the back coaches. How many people are on the train?
  8. 8.251 + ? = 931
  9. 9.370 + ? = 517
  10. 10.638 + 191 =
  11. 11.452 + 210 =
  12. 12.A train has 890 people in the front coaches and 100 people in the back coaches. How many people are on the train?
  13. 13.A train has 270 people in the front coaches and 438 people in the back coaches. How many people are on the train?
  14. 14.444 + 131 =
  15. 15.A train has 272 people in the front coaches and 416 people in the back coaches. How many people are on the train?
  16. 16.? + 307 = 831
  17. 17.? − 117 = 163
  18. 18.640 + ? = 809
  19. 19.843 + 151 =
  20. 20.570 − 468 =
  21. 21.A train has 372 people in the front coaches and 344 people in the back coaches. How many people are on the train?
  22. 22.669 + 185 =
  23. 23.A train has 339 people in the front coaches and 242 people in the back coaches. How many people are on the train?
  24. 24.153 + 105 =
  25. 25.631 + 298 =
  26. 26.A school has 938 children. 365 of them are girls. How many boys are there?
  27. 27.A school has 226 children. 101 of them are girls. How many boys are there?
  28. 28.659 + 108 =
  29. 29.? + 196 = 545
  30. 30.863 + 104 =
  31. 31.163 + 290 =
  32. 32.460 + 376 =
  33. 33.521 + 411 =
  34. 34.448 + 209 =
  35. 35.810 + ? = 910
  36. 36.? + 529 = 699
  37. 37.? − 106 = 649
  38. 38.697 + 199 =
  39. 39.861 + 127 =
  40. 40.523 − 411 =

Answer key

  1. 574
  2. 299
  3. 909
  4. 883
  5. 243
  6. 726
  7. 949
  8. 680
  9. 147
  10. 829
  11. 662
  12. 990
  13. 708
  14. 575
  15. 688
  16. 524
  17. 280
  18. 169
  19. 994
  20. 102
  21. 716
  22. 854
  23. 581
  24. 258
  25. 929
  26. 573
  27. 125
  28. 767
  29. 349
  30. 967
  31. 453
  32. 836
  33. 932
  34. 657
  35. 100
  36. 170
  37. 755
  38. 896
  39. 988
  40. 112

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