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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 527 · 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. 1.421 − 242 =
  2. 2.A school has 390 children. 196 of them are girls. How many boys are there?
  3. 3.? + 106 = 932
  4. 4.533 − ? = 54
  5. 5.A school has 258 children. 166 of them are girls. How many boys are there?
  6. 6.267 + 160 =
  7. 7.? − 316 = 10
  8. 8.A train has 332 people in the front coaches and 310 people in the back coaches. How many people are on the train?
  9. 9.A train has 224 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  10. 10.? + 846 = 946
  11. 11.220 − 125 =
  12. 12.A school has 219 children. 110 of them are girls. How many boys are there?
  13. 13.A school has 502 children. 374 of them are girls. How many boys are there?
  14. 14.566 − ? = 369
  15. 15.A train has 460 people in the front coaches and 284 people in the back coaches. How many people are on the train?
  16. 16.A train has 132 people in the front coaches and 218 people in the back coaches. How many people are on the train?
  17. 17.495 − 305 =
  18. 18.447 − 179 =
  19. 19.639 − ? = 290
  20. 20.436 + ? = 749
  21. 21.857 + 106 =
  22. 22.A train has 346 people in the front coaches and 396 people in the back coaches. How many people are on the train?
  23. 23.632 − 153 =
  24. 24.110 + 167 =
  25. 25.756 + 118 =
  26. 26.A train has 718 people in the front coaches and 158 people in the back coaches. How many people are on the train?
  27. 27.A train has 258 people in the front coaches and 733 people in the back coaches. How many people are on the train?
  28. 28.321 − 305 =
  29. 29.A train has 811 people in the front coaches and 144 people in the back coaches. How many people are on the train?
  30. 30.A train has 740 people in the front coaches and 111 people in the back coaches. How many people are on the train?
  31. 31.280 − ? = 165
  32. 32.? + 538 = 747
  33. 33.A school has 813 children. 733 of them are girls. How many boys are there?
  34. 34.286 + 295 =
  35. 35.A train has 316 people in the front coaches and 325 people in the back coaches. How many people are on the train?
  36. 36.A school has 831 children. 131 of them are girls. How many boys are there?
  37. 37.343 − ? = 198
  38. 38.610 − ? = 33
  39. 39.A train has 333 people in the front coaches and 651 people in the back coaches. How many people are on the train?
  40. 40.A school has 894 children. 752 of them are girls. How many boys are there?

Answer key

  1. 179
  2. 194
  3. 826
  4. 479
  5. 92
  6. 427
  7. 326
  8. 642
  9. 509
  10. 100
  11. 95
  12. 109
  13. 128
  14. 197
  15. 744
  16. 350
  17. 190
  18. 268
  19. 349
  20. 313
  21. 963
  22. 742
  23. 479
  24. 277
  25. 874
  26. 876
  27. 991
  28. 16
  29. 955
  30. 851
  31. 115
  32. 209
  33. 80
  34. 581
  35. 641
  36. 700
  37. 145
  38. 577
  39. 984
  40. 142

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