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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 85 · 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.? + 321 = 586
  2. 2.557 + 132 =
  3. 3.A train has 613 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  4. 4.508 − 411 =
  5. 5.723 + 124 =
  6. 6.138 + ? = 600
  7. 7.? − 134 = 116
  8. 8.A school has 811 children. 485 of them are girls. How many boys are there?
  9. 9.261 + ? = 959
  10. 10.A school has 813 children. 565 of them are girls. How many boys are there?
  11. 11.144 + 338 =
  12. 12.A train has 874 people in the front coaches and 119 people in the back coaches. How many people are on the train?
  13. 13.289 + 431 =
  14. 14.614 − 128 =
  15. 15.421 − 257 =
  16. 16.A school has 675 children. 381 of them are girls. How many boys are there?
  17. 17.A train has 818 people in the front coaches and 115 people in the back coaches. How many people are on the train?
  18. 18.632 − ? = 2
  19. 19.? + 172 = 277
  20. 20.A train has 241 people in the front coaches and 121 people in the back coaches. How many people are on the train?
  21. 21.311 − ? = 155
  22. 22.189 + 431 =
  23. 23.234 − 147 =
  24. 24.A school has 749 children. 325 of them are girls. How many boys are there?
  25. 25.A school has 920 children. 620 of them are girls. How many boys are there?
  26. 26.620 − 159 =
  27. 27.736 − ? = 539
  28. 28.A train has 295 people in the front coaches and 147 people in the back coaches. How many people are on the train?
  29. 29.A school has 544 children. 383 of them are girls. How many boys are there?
  30. 30.534 + 145 =
  31. 31.571 − 415 =
  32. 32.? + 394 = 653
  33. 33.A school has 673 children. 157 of them are girls. How many boys are there?
  34. 34.A school has 371 children. 145 of them are girls. How many boys are there?
  35. 35.A train has 633 people in the front coaches and 208 people in the back coaches. How many people are on the train?
  36. 36.A school has 747 children. 459 of them are girls. How many boys are there?
  37. 37.A train has 578 people in the front coaches and 172 people in the back coaches. How many people are on the train?
  38. 38.357 + ? = 993
  39. 39.716 − ? = 545
  40. 40.784 + 131 =

Answer key

  1. 265
  2. 689
  3. 795
  4. 97
  5. 847
  6. 462
  7. 250
  8. 326
  9. 698
  10. 248
  11. 482
  12. 993
  13. 720
  14. 486
  15. 164
  16. 294
  17. 933
  18. 630
  19. 105
  20. 362
  21. 156
  22. 620
  23. 87
  24. 424
  25. 300
  26. 461
  27. 197
  28. 442
  29. 161
  30. 679
  31. 156
  32. 259
  33. 516
  34. 226
  35. 841
  36. 288
  37. 750
  38. 636
  39. 171
  40. 915

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