← 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 648 · 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. 1.244 − 131 =
  2. 2.175 + ? = 803
  3. 3.201 + 782 =
  4. 4.? − 252 = 705
  5. 5.676 − 231 =
  6. 6.306 − 147 =
  7. 7.? + 531 = 746
  8. 8.A train has 262 people in the front coaches and 581 people in the back coaches. How many people are on the train?
  9. 9.322 + 311 =
  10. 10.130 + ? = 419
  11. 11.A school has 428 children. 424 of them are girls. How many boys are there?
  12. 12.A school has 207 children. 153 of them are girls. How many boys are there?
  13. 13.874 + 120 =
  14. 14.A train has 481 people in the front coaches and 170 people in the back coaches. How many people are on the train?
  15. 15.A train has 822 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  16. 16.479 + 236 =
  17. 17.994 − ? = 878
  18. 18.A train has 270 people in the front coaches and 708 people in the back coaches. How many people are on the train?
  19. 19.A train has 325 people in the front coaches and 208 people in the back coaches. How many people are on the train?
  20. 20.? + 240 = 832
  21. 21.318 + 299 =
  22. 22.? + 882 = 994
  23. 23.? + 335 = 995
  24. 24.292 + 231 =
  25. 25.516 − 186 =
  26. 26.222 − 191 =
  27. 27.? + 131 = 782
  28. 28.395 − 168 =
  29. 29.A school has 500 children. 446 of them are girls. How many boys are there?
  30. 30.A school has 330 children. 222 of them are girls. How many boys are there?
  31. 31.? − 314 = 206
  32. 32.785 + 157 =
  33. 33.788 − 109 =
  34. 34.939 − ? = 36
  35. 35.958 − 643 =
  36. 36.355 + 288 =
  37. 37.A school has 701 children. 345 of them are girls. How many boys are there?
  38. 38.A train has 243 people in the front coaches and 717 people in the back coaches. How many people are on the train?
  39. 39.261 + 279 =
  40. 40.428 + 170 =

Answer key

  1. 113
  2. 628
  3. 983
  4. 957
  5. 445
  6. 159
  7. 215
  8. 843
  9. 633
  10. 289
  11. 4
  12. 54
  13. 994
  14. 651
  15. 947
  16. 715
  17. 116
  18. 978
  19. 533
  20. 592
  21. 617
  22. 112
  23. 660
  24. 523
  25. 330
  26. 31
  27. 651
  28. 227
  29. 54
  30. 108
  31. 520
  32. 942
  33. 679
  34. 903
  35. 315
  36. 643
  37. 356
  38. 960
  39. 540
  40. 598

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