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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 162 · 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. 1.505 − 46 =
  2. 2.598 − 98 =
  3. 3.289 − 17 =
  4. 4.289 − 56 =
  5. 5.424 − 18 =
  6. 6.237 − 37 =
  7. 7.239 − 58 =
  8. 8.53 − 17 =
  9. 9.329 − 48 =
  10. 10.515 − 86 =
  11. 11.60 − 18 =
  12. 12.344 − 18 =
  13. 13.418 − 36 =
  14. 14.178 − 98 =
  15. 15.257 − 59 =
  16. 16.594 − 19 =
  17. 17.378 − 86 =
  18. 18.160 − 99 =
  19. 19.148 − 37 =
  20. 20.571 − 16 =
  21. 21.176 − 26 =
  22. 22.377 − 18 =
  23. 23.337 − 48 =
  24. 24.157 − 57 =
  25. 25.164 − 18 =
  26. 26.299 − 56 =
  27. 27.520 − 37 =
  28. 28.480 − 96 =
  29. 29.319 − 26 =
  30. 30.325 − 69 =
  31. 31.213 − 56 =
  32. 32.73 − 16 =
  33. 33.118 − 19 =
  34. 34.395 − 59 =
  35. 35.275 − 28 =
  36. 36.556 − 38 =
  37. 37.165 − 56 =
  38. 38.339 − 36 =
  39. 39.225 − 89 =
  40. 40.231 − 46 =

Answer key

  1. 459
  2. 500
  3. 272
  4. 233
  5. 406
  6. 200
  7. 181
  8. 36
  9. 281
  10. 429
  11. 42
  12. 326
  13. 382
  14. 80
  15. 198
  16. 575
  17. 292
  18. 61
  19. 111
  20. 555
  21. 150
  22. 359
  23. 289
  24. 100
  25. 146
  26. 243
  27. 483
  28. 384
  29. 293
  30. 256
  31. 157
  32. 57
  33. 99
  34. 336
  35. 247
  36. 518
  37. 109
  38. 303
  39. 136
  40. 185

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