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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 341 · 40 questions
TalentJR

The fast method (Shift both): How much makes the second number round? 68 needs 2 to make 70. Add that amount to BOTH numbers. Take away the round number.

NameDateTime takenScore ___ / 40
  1. 1.57 − 16 =
  2. 2.204 − 86 =
  3. 3.310 − 98 =
  4. 4.338 − 38 =
  5. 5.361 − 56 =
  6. 6.117 − 39 =
  7. 7.241 − 16 =
  8. 8.210 − 78 =
  9. 9.491 − 57 =
  10. 10.454 − 27 =
  11. 11.459 − 67 =
  12. 12.556 − 48 =
  13. 13.161 − 77 =
  14. 14.550 − 56 =
  15. 15.181 − 76 =
  16. 16.374 − 36 =
  17. 17.402 − 38 =
  18. 18.132 − 56 =
  19. 19.307 − 19 =
  20. 20.107 − 67 =
  21. 21.555 − 89 =
  22. 22.227 − 97 =
  23. 23.344 − 79 =
  24. 24.245 − 86 =
  25. 25.476 − 28 =
  26. 26.366 − 48 =
  27. 27.413 − 28 =
  28. 28.243 − 86 =
  29. 29.133 − 17 =
  30. 30.496 − 37 =
  31. 31.206 − 17 =
  32. 32.322 − 88 =
  33. 33.161 − 79 =
  34. 34.365 − 56 =
  35. 35.355 − 59 =
  36. 36.149 − 96 =
  37. 37.401 − 97 =
  38. 38.63 − 58 =
  39. 39.56 − 49 =
  40. 40.169 − 69 =

Answer key

  1. 41
  2. 118
  3. 212
  4. 300
  5. 305
  6. 78
  7. 225
  8. 132
  9. 434
  10. 427
  11. 392
  12. 508
  13. 84
  14. 494
  15. 105
  16. 338
  17. 364
  18. 76
  19. 288
  20. 40
  21. 466
  22. 130
  23. 265
  24. 159
  25. 448
  26. 318
  27. 385
  28. 157
  29. 116
  30. 459
  31. 189
  32. 234
  33. 82
  34. 309
  35. 296
  36. 53
  37. 304
  38. 5
  39. 7
  40. 100

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