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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 897 · 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 806 people in the front coaches and 124 people in the back coaches. How many people are on the train?
  2. 2.320 − 276 =
  3. 3.674 + 110 =
  4. 4.A school has 718 children. 111 of them are girls. How many boys are there?
  5. 5.174 + 442 =
  6. 6.598 − 185 =
  7. 7.A school has 504 children. 101 of them are girls. How many boys are there?
  8. 8.? + 117 = 869
  9. 9.A train has 257 people in the front coaches and 112 people in the back coaches. How many people are on the train?
  10. 10.? + 375 = 526
  11. 11.A train has 223 people in the front coaches and 581 people in the back coaches. How many people are on the train?
  12. 12.A school has 215 children. 181 of them are girls. How many boys are there?
  13. 13.223 + 222 =
  14. 14.A school has 763 children. 445 of them are girls. How many boys are there?
  15. 15.A school has 984 children. 195 of them are girls. How many boys are there?
  16. 16.A school has 216 children. 210 of them are girls. How many boys are there?
  17. 17.A school has 305 children. 134 of them are girls. How many boys are there?
  18. 18.858 + 138 =
  19. 19.408 − 323 =
  20. 20.686 − 321 =
  21. 21.533 − 479 =
  22. 22.A school has 359 children. 259 of them are girls. How many boys are there?
  23. 23.A train has 535 people in the front coaches and 152 people in the back coaches. How many people are on the train?
  24. 24.? + 847 = 976
  25. 25.? + 650 = 817
  26. 26.692 + 107 =
  27. 27.A school has 759 children. 141 of them are girls. How many boys are there?
  28. 28.? + 492 = 593
  29. 29.641 − ? = 378
  30. 30.141 + ? = 492
  31. 31.734 − 287 =
  32. 32.925 − 307 =
  33. 33.? − 505 = 41
  34. 34.A school has 208 children. 124 of them are girls. How many boys are there?
  35. 35.487 + ? = 948
  36. 36.776 + 164 =
  37. 37.? + 459 = 906
  38. 38.170 + ? = 378
  39. 39.A train has 501 people in the front coaches and 383 people in the back coaches. How many people are on the train?
  40. 40.502 + 417 =

Answer key

  1. 930
  2. 44
  3. 784
  4. 607
  5. 616
  6. 413
  7. 403
  8. 752
  9. 369
  10. 151
  11. 804
  12. 34
  13. 445
  14. 318
  15. 789
  16. 6
  17. 171
  18. 996
  19. 85
  20. 365
  21. 54
  22. 100
  23. 687
  24. 129
  25. 167
  26. 799
  27. 618
  28. 101
  29. 263
  30. 351
  31. 447
  32. 618
  33. 546
  34. 84
  35. 461
  36. 940
  37. 447
  38. 208
  39. 884
  40. 919

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