← 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 121 · 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.A train has 714 people in the front coaches and 143 people in the back coaches. How many people are on the train?
  2. 2.A school has 321 children. 279 of them are girls. How many boys are there?
  3. 3.A train has 207 people in the front coaches and 477 people in the back coaches. How many people are on the train?
  4. 4.A train has 209 people in the front coaches and 760 people in the back coaches. How many people are on the train?
  5. 5.758 + 185 =
  6. 6.A school has 774 children. 199 of them are girls. How many boys are there?
  7. 7.? + 679 = 985
  8. 8.A train has 877 people in the front coaches and 109 people in the back coaches. How many people are on the train?
  9. 9.A school has 415 children. 384 of them are girls. How many boys are there?
  10. 10.309 − 275 =
  11. 11.444 − 233 =
  12. 12.254 − 247 =
  13. 13.761 + ? = 937
  14. 14.342 + 463 =
  15. 15.456 − 207 =
  16. 16.652 + 347 =
  17. 17.492 + 301 =
  18. 18.663 + 218 =
  19. 19.A train has 382 people in the front coaches and 214 people in the back coaches. How many people are on the train?
  20. 20.579 − 566 =
  21. 21.788 + 132 =
  22. 22.254 − 148 =
  23. 23.565 + 195 =
  24. 24.694 + 178 =
  25. 25.? + 258 = 487
  26. 26.123 + 633 =
  27. 27.? + 886 = 987
  28. 28.A train has 786 people in the front coaches and 206 people in the back coaches. How many people are on the train?
  29. 29.A school has 931 children. 354 of them are girls. How many boys are there?
  30. 30.A train has 836 people in the front coaches and 125 people in the back coaches. How many people are on the train?
  31. 31.A train has 476 people in the front coaches and 414 people in the back coaches. How many people are on the train?
  32. 32.158 + 315 =
  33. 33.? − 175 = 53
  34. 34.651 + 294 =
  35. 35.? + 156 = 835
  36. 36.833 − ? = 149
  37. 37.611 + ? = 862
  38. 38.? − 251 = 123
  39. 39.552 − ? = 386
  40. 40.A school has 302 children. 157 of them are girls. How many boys are there?

Answer key

  1. 857
  2. 42
  3. 684
  4. 969
  5. 943
  6. 575
  7. 306
  8. 986
  9. 31
  10. 34
  11. 211
  12. 7
  13. 176
  14. 805
  15. 249
  16. 999
  17. 793
  18. 881
  19. 596
  20. 13
  21. 920
  22. 106
  23. 760
  24. 872
  25. 229
  26. 756
  27. 101
  28. 992
  29. 577
  30. 961
  31. 890
  32. 473
  33. 228
  34. 945
  35. 679
  36. 684
  37. 251
  38. 374
  39. 166
  40. 145

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