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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 271 · 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 train has 199 people in the front coaches and 211 people in the back coaches. How many people are on the train?
  2. 2.559 + ? = 810
  3. 3.A school has 817 children. 192 of them are girls. How many boys are there?
  4. 4.A train has 877 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  5. 5.? − 186 = 746
  6. 6.664 + 180 =
  7. 7.700 − 216 =
  8. 8.A train has 228 people in the front coaches and 282 people in the back coaches. How many people are on the train?
  9. 9.469 − 233 =
  10. 10.702 + 163 =
  11. 11.A school has 239 children. 224 of them are girls. How many boys are there?
  12. 12.203 − 112 =
  13. 13.A train has 223 people in the front coaches and 550 people in the back coaches. How many people are on the train?
  14. 14.146 + 141 =
  15. 15.A train has 338 people in the front coaches and 404 people in the back coaches. How many people are on the train?
  16. 16.A school has 412 children. 135 of them are girls. How many boys are there?
  17. 17.631 + ? = 764
  18. 18.A school has 433 children. 247 of them are girls. How many boys are there?
  19. 19.A train has 631 people in the front coaches and 313 people in the back coaches. How many people are on the train?
  20. 20.383 + 543 =
  21. 21.? − 125 = 343
  22. 22.A train has 584 people in the front coaches and 403 people in the back coaches. How many people are on the train?
  23. 23.A train has 851 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  24. 24.? + 320 = 560
  25. 25.A train has 584 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  26. 26.214 + 235 =
  27. 27.A train has 779 people in the front coaches and 142 people in the back coaches. How many people are on the train?
  28. 28.A train has 144 people in the front coaches and 212 people in the back coaches. How many people are on the train?
  29. 29.899 + 100 =
  30. 30.A train has 134 people in the front coaches and 378 people in the back coaches. How many people are on the train?
  31. 31.A train has 188 people in the front coaches and 807 people in the back coaches. How many people are on the train?
  32. 32.? + 310 = 614
  33. 33.390 − 384 =
  34. 34.877 + 103 =
  35. 35.347 − 238 =
  36. 36.530 + ? = 955
  37. 37.210 − 100 =
  38. 38.602 + ? = 822
  39. 39.? + 308 = 954
  40. 40.A school has 738 children. 146 of them are girls. How many boys are there?

Answer key

  1. 410
  2. 251
  3. 625
  4. 989
  5. 932
  6. 844
  7. 484
  8. 510
  9. 236
  10. 865
  11. 15
  12. 91
  13. 773
  14. 287
  15. 742
  16. 277
  17. 133
  18. 186
  19. 944
  20. 926
  21. 468
  22. 987
  23. 987
  24. 240
  25. 699
  26. 449
  27. 921
  28. 356
  29. 999
  30. 512
  31. 995
  32. 304
  33. 6
  34. 980
  35. 109
  36. 425
  37. 110
  38. 220
  39. 646
  40. 592

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