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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 632 · 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. 1.417 − 16 =
  2. 2.65 − 58 =
  3. 3.238 − 58 =
  4. 4.178 − 87 =
  5. 5.431 − 79 =
  6. 6.476 − 78 =
  7. 7.398 − 66 =
  8. 8.290 − 27 =
  9. 9.422 − 88 =
  10. 10.67 − 38 =
  11. 11.547 − 79 =
  12. 12.160 − 86 =
  13. 13.277 − 17 =
  14. 14.197 − 16 =
  15. 15.315 − 29 =
  16. 16.146 − 49 =
  17. 17.224 − 86 =
  18. 18.505 − 48 =
  19. 19.448 − 59 =
  20. 20.218 − 89 =
  21. 21.323 − 97 =
  22. 22.176 − 96 =
  23. 23.104 − 78 =
  24. 24.394 − 86 =
  25. 25.447 − 46 =
  26. 26.90 − 27 =
  27. 27.265 − 99 =
  28. 28.108 − 19 =
  29. 29.198 − 18 =
  30. 30.169 − 17 =
  31. 31.154 − 58 =
  32. 32.548 − 16 =
  33. 33.120 − 66 =
  34. 34.496 − 46 =
  35. 35.209 − 89 =
  36. 36.200 − 87 =
  37. 37.166 − 67 =
  38. 38.475 − 16 =
  39. 39.65 − 36 =
  40. 40.99 − 66 =

Answer key

  1. 401
  2. 7
  3. 180
  4. 91
  5. 352
  6. 398
  7. 332
  8. 263
  9. 334
  10. 29
  11. 468
  12. 74
  13. 260
  14. 181
  15. 286
  16. 97
  17. 138
  18. 457
  19. 389
  20. 129
  21. 226
  22. 80
  23. 26
  24. 308
  25. 401
  26. 63
  27. 166
  28. 89
  29. 180
  30. 152
  31. 96
  32. 532
  33. 54
  34. 450
  35. 120
  36. 113
  37. 99
  38. 459
  39. 29
  40. 33

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