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Class 3 Maths Worksheet: Addition and Subtraction

Maths worksheets lesson 17: 3-digit addition and subtraction · Set 708 · 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. 1.420 − 198 =
  2. 2.883 − ? = 255
  3. 3.A train has 198 people in the front coaches and 351 people in the back coaches. How many people are on the train?
  4. 4.151 + ? = 281
  5. 5.A school has 865 children. 256 of them are girls. How many boys are there?
  6. 6.783 + 159 =
  7. 7.? + 354 = 538
  8. 8.? − 263 = 735
  9. 9.A train has 117 people in the front coaches and 370 people in the back coaches. How many people are on the train?
  10. 10.883 − 203 =
  11. 11.703 + 112 =
  12. 12.208 + 131 =
  13. 13.429 − ? = 141
  14. 14.811 − ? = 131
  15. 15.A train has 896 people in the front coaches and 101 people in the back coaches. How many people are on the train?
  16. 16.A school has 210 children. 188 of them are girls. How many boys are there?
  17. 17.A train has 307 people in the front coaches and 350 people in the back coaches. How many people are on the train?
  18. 18.A train has 551 people in the front coaches and 217 people in the back coaches. How many people are on the train?
  19. 19.323 + ? = 881
  20. 20.A train has 197 people in the front coaches and 234 people in the back coaches. How many people are on the train?
  21. 21.A school has 215 children. 203 of them are girls. How many boys are there?
  22. 22.690 + 104 =
  23. 23.? + 575 = 953
  24. 24.? − 487 = 108
  25. 25.A school has 241 children. 171 of them are girls. How many boys are there?
  26. 26.638 + ? = 972
  27. 27.A train has 457 people in the front coaches and 388 people in the back coaches. How many people are on the train?
  28. 28.588 + ? = 854
  29. 29.A train has 251 people in the front coaches and 311 people in the back coaches. How many people are on the train?
  30. 30.? + 472 = 696
  31. 31.116 + 765 =
  32. 32.A school has 936 children. 317 of them are girls. How many boys are there?
  33. 33.? + 750 = 991
  34. 34.187 + ? = 927
  35. 35.A train has 540 people in the front coaches and 300 people in the back coaches. How many people are on the train?
  36. 36.? − 343 = 332
  37. 37.368 + ? = 570
  38. 38.737 − ? = 515
  39. 39.A school has 865 children. 431 of them are girls. How many boys are there?
  40. 40.? + 697 = 906

Answer key

  1. 222
  2. 628
  3. 549
  4. 130
  5. 609
  6. 942
  7. 184
  8. 998
  9. 487
  10. 680
  11. 815
  12. 339
  13. 288
  14. 680
  15. 997
  16. 22
  17. 657
  18. 768
  19. 558
  20. 431
  21. 12
  22. 794
  23. 378
  24. 595
  25. 70
  26. 334
  27. 845
  28. 266
  29. 562
  30. 224
  31. 881
  32. 619
  33. 241
  34. 740
  35. 840
  36. 675
  37. 202
  38. 222
  39. 434
  40. 209

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