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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 818 · 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. 1.393 − 219 =
  2. 2.A train has 211 people in the front coaches and 288 people in the back coaches. How many people are on the train?
  3. 3.770 − ? = 588
  4. 4.A school has 952 children. 775 of them are girls. How many boys are there?
  5. 5.? + 778 = 913
  6. 6.817 − 250 =
  7. 7.A train has 487 people in the front coaches and 451 people in the back coaches. How many people are on the train?
  8. 8.A train has 277 people in the front coaches and 287 people in the back coaches. How many people are on the train?
  9. 9.202 + ? = 795
  10. 10.446 − 224 =
  11. 11.302 − ? = 1
  12. 12.371 − ? = 93
  13. 13.A train has 379 people in the front coaches and 145 people in the back coaches. How many people are on the train?
  14. 14.537 + 183 =
  15. 15.627 + ? = 916
  16. 16.A train has 308 people in the front coaches and 595 people in the back coaches. How many people are on the train?
  17. 17.? − 154 = 106
  18. 18.A train has 208 people in the front coaches and 681 people in the back coaches. How many people are on the train?
  19. 19.469 − 445 =
  20. 20.? + 728 = 976
  21. 21.678 − 311 =
  22. 22.456 + ? = 634
  23. 23.304 − 119 =
  24. 24.? − 863 = 27
  25. 25.? − 219 = 111
  26. 26.A train has 811 people in the front coaches and 164 people in the back coaches. How many people are on the train?
  27. 27.A school has 399 children. 156 of them are girls. How many boys are there?
  28. 28.757 + 121 =
  29. 29.A train has 432 people in the front coaches and 455 people in the back coaches. How many people are on the train?
  30. 30.A train has 375 people in the front coaches and 567 people in the back coaches. How many people are on the train?
  31. 31.274 + ? = 764
  32. 32.255 + 731 =
  33. 33.630 − 574 =
  34. 34.? + 238 = 805
  35. 35.A school has 710 children. 483 of them are girls. How many boys are there?
  36. 36.294 − 275 =
  37. 37.A school has 402 children. 188 of them are girls. How many boys are there?
  38. 38.594 + 125 =
  39. 39.747 + 115 =
  40. 40.482 − 331 =

Answer key

  1. 174
  2. 499
  3. 182
  4. 177
  5. 135
  6. 567
  7. 938
  8. 564
  9. 593
  10. 222
  11. 301
  12. 278
  13. 524
  14. 720
  15. 289
  16. 903
  17. 260
  18. 889
  19. 24
  20. 248
  21. 367
  22. 178
  23. 185
  24. 890
  25. 330
  26. 975
  27. 243
  28. 878
  29. 887
  30. 942
  31. 490
  32. 986
  33. 56
  34. 567
  35. 227
  36. 19
  37. 214
  38. 719
  39. 862
  40. 151

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