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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 416 · 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 299 people in the front coaches and 661 people in the back coaches. How many people are on the train?
  2. 2.766 + 124 =
  3. 3.769 + 187 =
  4. 4.805 − ? = 447
  5. 5.A train has 345 people in the front coaches and 368 people in the back coaches. How many people are on the train?
  6. 6.A school has 734 children. 272 of them are girls. How many boys are there?
  7. 7.786 + ? = 946
  8. 8.306 − 190 =
  9. 9.A school has 600 children. 544 of them are girls. How many boys are there?
  10. 10.A train has 132 people in the front coaches and 395 people in the back coaches. How many people are on the train?
  11. 11.? + 740 = 965
  12. 12.672 − ? = 344
  13. 13.654 − 146 =
  14. 14.876 + 119 =
  15. 15.A school has 437 children. 387 of them are girls. How many boys are there?
  16. 16.A school has 365 children. 142 of them are girls. How many boys are there?
  17. 17.? + 654 = 801
  18. 18.A train has 324 people in the front coaches and 138 people in the back coaches. How many people are on the train?
  19. 19.962 − ? = 816
  20. 20.A school has 315 children. 219 of them are girls. How many boys are there?
  21. 21.246 − 178 =
  22. 22.423 − 410 =
  23. 23.A train has 825 people in the front coaches and 104 people in the back coaches. How many people are on the train?
  24. 24.A school has 898 children. 486 of them are girls. How many boys are there?
  25. 25.? + 718 = 837
  26. 26.A train has 228 people in the front coaches and 719 people in the back coaches. How many people are on the train?
  27. 27.234 + 402 =
  28. 28.A train has 884 people in the front coaches and 105 people in the back coaches. How many people are on the train?
  29. 29.628 − 510 =
  30. 30.501 + 110 =
  31. 31.736 − 152 =
  32. 32.? − 257 = 389
  33. 33.424 − ? = 224
  34. 34.314 − 216 =
  35. 35.? + 310 = 564
  36. 36.? + 414 = 610
  37. 37.A school has 532 children. 216 of them are girls. How many boys are there?
  38. 38.605 − 419 =
  39. 39.A train has 668 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  40. 40.451 − ? = 159

Answer key

  1. 960
  2. 890
  3. 956
  4. 358
  5. 713
  6. 462
  7. 160
  8. 116
  9. 56
  10. 527
  11. 225
  12. 328
  13. 508
  14. 995
  15. 50
  16. 223
  17. 147
  18. 462
  19. 146
  20. 96
  21. 68
  22. 13
  23. 929
  24. 412
  25. 119
  26. 947
  27. 636
  28. 989
  29. 118
  30. 611
  31. 584
  32. 646
  33. 200
  34. 98
  35. 254
  36. 196
  37. 316
  38. 186
  39. 815
  40. 292

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