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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 196 · 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. 1.457 + 126 =
  2. 2.426 + 445 =
  3. 3.219 + ? = 775
  4. 4.A train has 545 people in the front coaches and 335 people in the back coaches. How many people are on the train?
  5. 5.574 − 446 =
  6. 6.416 − ? = 196
  7. 7.450 + 167 =
  8. 8.310 + 352 =
  9. 9.A train has 248 people in the front coaches and 140 people in the back coaches. How many people are on the train?
  10. 10.A school has 769 children. 609 of them are girls. How many boys are there?
  11. 11.A train has 795 people in the front coaches and 175 people in the back coaches. How many people are on the train?
  12. 12.335 + ? = 688
  13. 13.908 − 224 =
  14. 14.349 − 184 =
  15. 15.? + 462 = 995
  16. 16.A school has 487 children. 201 of them are girls. How many boys are there?
  17. 17.? + 550 = 760
  18. 18.A school has 927 children. 511 of them are girls. How many boys are there?
  19. 19.? + 765 = 998
  20. 20.838 + 154 =
  21. 21.? + 836 = 980
  22. 22.698 + ? = 898
  23. 23.? + 584 = 992
  24. 24.734 − 259 =
  25. 25.? − 253 = 26
  26. 26.531 + 321 =
  27. 27.874 − 576 =
  28. 28.127 + ? = 401
  29. 29.338 − 225 =
  30. 30.A school has 498 children. 190 of them are girls. How many boys are there?
  31. 31.279 − 229 =
  32. 32.145 + 746 =
  33. 33.A school has 967 children. 345 of them are girls. How many boys are there?
  34. 34.334 + 598 =
  35. 35.319 − 127 =
  36. 36.? − 129 = 163
  37. 37.A train has 439 people in the front coaches and 550 people in the back coaches. How many people are on the train?
  38. 38.A train has 109 people in the front coaches and 461 people in the back coaches. How many people are on the train?
  39. 39.714 − 394 =
  40. 40.? − 162 = 264

Answer key

  1. 583
  2. 871
  3. 556
  4. 880
  5. 128
  6. 220
  7. 617
  8. 662
  9. 388
  10. 160
  11. 970
  12. 353
  13. 684
  14. 165
  15. 533
  16. 286
  17. 210
  18. 416
  19. 233
  20. 992
  21. 144
  22. 200
  23. 408
  24. 475
  25. 279
  26. 852
  27. 298
  28. 274
  29. 113
  30. 308
  31. 50
  32. 891
  33. 622
  34. 932
  35. 192
  36. 292
  37. 989
  38. 570
  39. 320
  40. 426

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