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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 573 · 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. 1.273 − 99 =
  2. 2.204 − 26 =
  3. 3.403 − 17 =
  4. 4.309 − 16 =
  5. 5.204 − 79 =
  6. 6.158 − 36 =
  7. 7.275 − 79 =
  8. 8.173 − 59 =
  9. 9.242 − 78 =
  10. 10.90 − 36 =
  11. 11.366 − 58 =
  12. 12.184 − 68 =
  13. 13.159 − 68 =
  14. 14.179 − 97 =
  15. 15.259 − 37 =
  16. 16.459 − 57 =
  17. 17.310 − 46 =
  18. 18.184 − 98 =
  19. 19.365 − 47 =
  20. 20.370 − 38 =
  21. 21.354 − 29 =
  22. 22.284 − 16 =
  23. 23.201 − 19 =
  24. 24.169 − 77 =
  25. 25.418 − 79 =
  26. 26.579 − 37 =
  27. 27.54 − 27 =
  28. 28.596 − 87 =
  29. 29.473 − 27 =
  30. 30.340 − 59 =
  31. 31.552 − 56 =
  32. 32.165 − 88 =
  33. 33.382 − 77 =
  34. 34.60 − 59 =
  35. 35.548 − 38 =
  36. 36.552 − 47 =
  37. 37.192 − 29 =
  38. 38.384 − 17 =
  39. 39.149 − 36 =
  40. 40.561 − 27 =

Answer key

  1. 174
  2. 178
  3. 386
  4. 293
  5. 125
  6. 122
  7. 196
  8. 114
  9. 164
  10. 54
  11. 308
  12. 116
  13. 91
  14. 82
  15. 222
  16. 402
  17. 264
  18. 86
  19. 318
  20. 332
  21. 325
  22. 268
  23. 182
  24. 92
  25. 339
  26. 542
  27. 27
  28. 509
  29. 446
  30. 281
  31. 496
  32. 77
  33. 305
  34. 1
  35. 510
  36. 505
  37. 163
  38. 367
  39. 113
  40. 534

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