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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 553 · 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. 1.710 + 224 =
  2. 2.844 + 113 =
  3. 3.558 − 288 =
  4. 4.? − 699 = 1
  5. 5.383 − ? = 37
  6. 6.851 − ? = 397
  7. 7.A train has 245 people in the front coaches and 120 people in the back coaches. How many people are on the train?
  8. 8.? − 267 = 224
  9. 9.A train has 487 people in the front coaches and 188 people in the back coaches. How many people are on the train?
  10. 10.271 − 117 =
  11. 11.374 − ? = 203
  12. 12.? + 135 = 853
  13. 13.802 + ? = 987
  14. 14.? + 462 = 909
  15. 15.? + 229 = 617
  16. 16.A school has 258 children. 197 of them are girls. How many boys are there?
  17. 17.805 + 174 =
  18. 18.A train has 543 people in the front coaches and 303 people in the back coaches. How many people are on the train?
  19. 19.A train has 264 people in the front coaches and 548 people in the back coaches. How many people are on the train?
  20. 20.? − 140 = 218
  21. 21.? + 481 = 887
  22. 22.276 + 144 =
  23. 23.403 + 431 =
  24. 24.A train has 818 people in the front coaches and 142 people in the back coaches. How many people are on the train?
  25. 25.? + 240 = 814
  26. 26.A train has 775 people in the front coaches and 136 people in the back coaches. How many people are on the train?
  27. 27.709 − 306 =
  28. 28.? + 888 = 988
  29. 29.? − 298 = 47
  30. 30.A train has 600 people in the front coaches and 164 people in the back coaches. How many people are on the train?
  31. 31.155 + ? = 286
  32. 32.A school has 887 children. 194 of them are girls. How many boys are there?
  33. 33.A school has 554 children. 171 of them are girls. How many boys are there?
  34. 34.234 + ? = 603
  35. 35.578 + ? = 901
  36. 36.A train has 445 people in the front coaches and 297 people in the back coaches. How many people are on the train?
  37. 37.A train has 563 people in the front coaches and 303 people in the back coaches. How many people are on the train?
  38. 38.289 − 119 =
  39. 39.? − 114 = 515
  40. 40.879 + ? = 983

Answer key

  1. 934
  2. 957
  3. 270
  4. 700
  5. 346
  6. 454
  7. 365
  8. 491
  9. 675
  10. 154
  11. 171
  12. 718
  13. 185
  14. 447
  15. 388
  16. 61
  17. 979
  18. 846
  19. 812
  20. 358
  21. 406
  22. 420
  23. 834
  24. 960
  25. 574
  26. 911
  27. 403
  28. 100
  29. 345
  30. 764
  31. 131
  32. 693
  33. 383
  34. 369
  35. 323
  36. 742
  37. 866
  38. 170
  39. 629
  40. 104

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