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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 496 · 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. 1.684 − ? = 481
  2. 2.A school has 935 children. 173 of them are girls. How many boys are there?
  3. 3.A school has 260 children. 109 of them are girls. How many boys are there?
  4. 4.214 + ? = 832
  5. 5.306 + 210 =
  6. 6.775 − 272 =
  7. 7.456 − 387 =
  8. 8.625 + ? = 799
  9. 9.A train has 121 people in the front coaches and 589 people in the back coaches. How many people are on the train?
  10. 10.530 − ? = 293
  11. 11.151 + 549 =
  12. 12.A train has 110 people in the front coaches and 676 people in the back coaches. How many people are on the train?
  13. 13.A train has 434 people in the front coaches and 318 people in the back coaches. How many people are on the train?
  14. 14.200 + 306 =
  15. 15.A train has 374 people in the front coaches and 455 people in the back coaches. How many people are on the train?
  16. 16.A train has 324 people in the front coaches and 178 people in the back coaches. How many people are on the train?
  17. 17.384 − ? = 187
  18. 18.213 + 554 =
  19. 19.? + 466 = 724
  20. 20.262 − 133 =
  21. 21.969 − 292 =
  22. 22.A train has 525 people in the front coaches and 243 people in the back coaches. How many people are on the train?
  23. 23.330 − 291 =
  24. 24.176 + 492 =
  25. 25.A train has 844 people in the front coaches and 124 people in the back coaches. How many people are on the train?
  26. 26.? + 563 = 780
  27. 27.449 + 263 =
  28. 28.408 + 312 =
  29. 29.473 + 206 =
  30. 30.A school has 749 children. 280 of them are girls. How many boys are there?
  31. 31.938 − 387 =
  32. 32.A school has 293 children. 289 of them are girls. How many boys are there?
  33. 33.310 − ? = 201
  34. 34.A school has 307 children. 159 of them are girls. How many boys are there?
  35. 35.? − 625 = 141
  36. 36.A school has 309 children. 191 of them are girls. How many boys are there?
  37. 37.A train has 432 people in the front coaches and 473 people in the back coaches. How many people are on the train?
  38. 38.733 + 236 =
  39. 39.184 + ? = 396
  40. 40.538 − 420 =

Answer key

  1. 203
  2. 762
  3. 151
  4. 618
  5. 516
  6. 503
  7. 69
  8. 174
  9. 710
  10. 237
  11. 700
  12. 786
  13. 752
  14. 506
  15. 829
  16. 502
  17. 197
  18. 767
  19. 258
  20. 129
  21. 677
  22. 768
  23. 39
  24. 668
  25. 968
  26. 217
  27. 712
  28. 720
  29. 679
  30. 469
  31. 551
  32. 4
  33. 109
  34. 148
  35. 766
  36. 118
  37. 905
  38. 969
  39. 212
  40. 118

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