← 3-digit addition and subtraction lesson New set →

Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 55 · 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. 1.266 − ? = 37
  2. 2.A train has 344 people in the front coaches and 124 people in the back coaches. How many people are on the train?
  3. 3.246 + 176 =
  4. 4.463 + ? = 938
  5. 5.813 − ? = 287
  6. 6.A train has 248 people in the front coaches and 159 people in the back coaches. How many people are on the train?
  7. 7.221 − 176 =
  8. 8.827 − 496 =
  9. 9.A school has 789 children. 308 of them are girls. How many boys are there?
  10. 10.A school has 558 children. 396 of them are girls. How many boys are there?
  11. 11.894 + 100 =
  12. 12.973 − ? = 367
  13. 13.713 − ? = 107
  14. 14.A train has 102 people in the front coaches and 878 people in the back coaches. How many people are on the train?
  15. 15.886 + 102 =
  16. 16.548 + 246 =
  17. 17.587 + 204 =
  18. 18.484 − ? = 98
  19. 19.890 − 100 =
  20. 20.A school has 816 children. 336 of them are girls. How many boys are there?
  21. 21.? − 627 = 127
  22. 22.? − 375 = 61
  23. 23.430 + 327 =
  24. 24.A school has 757 children. 497 of them are girls. How many boys are there?
  25. 25.A train has 301 people in the front coaches and 285 people in the back coaches. How many people are on the train?
  26. 26.624 + 263 =
  27. 27.? − 119 = 333
  28. 28.A school has 926 children. 313 of them are girls. How many boys are there?
  29. 29.856 − 775 =
  30. 30.765 − 328 =
  31. 31.A school has 648 children. 522 of them are girls. How many boys are there?
  32. 32.810 + 118 =
  33. 33.811 + 152 =
  34. 34.? − 475 = 189
  35. 35.623 − 123 =
  36. 36.A school has 700 children. 617 of them are girls. How many boys are there?
  37. 37.A train has 712 people in the front coaches and 235 people in the back coaches. How many people are on the train?
  38. 38.A train has 780 people in the front coaches and 182 people in the back coaches. How many people are on the train?
  39. 39.128 + 622 =
  40. 40.A school has 340 children. 328 of them are girls. How many boys are there?

Answer key

  1. 229
  2. 468
  3. 422
  4. 475
  5. 526
  6. 407
  7. 45
  8. 331
  9. 481
  10. 162
  11. 994
  12. 606
  13. 606
  14. 980
  15. 988
  16. 794
  17. 791
  18. 386
  19. 790
  20. 480
  21. 754
  22. 436
  23. 757
  24. 260
  25. 586
  26. 887
  27. 452
  28. 613
  29. 81
  30. 437
  31. 126
  32. 928
  33. 963
  34. 664
  35. 500
  36. 83
  37. 947
  38. 962
  39. 750
  40. 12

Free maths worksheets lessons, practice and worksheets at talentjr.in/maths-worksheets