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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 760 · 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. 1.320 − 26 =
  2. 2.130 − 96 =
  3. 3.200 − 39 =
  4. 4.149 − 98 =
  5. 5.557 − 17 =
  6. 6.309 − 37 =
  7. 7.268 − 29 =
  8. 8.158 − 49 =
  9. 9.543 − 87 =
  10. 10.500 − 67 =
  11. 11.319 − 49 =
  12. 12.129 − 98 =
  13. 13.299 − 39 =
  14. 14.228 − 56 =
  15. 15.442 − 47 =
  16. 16.212 − 88 =
  17. 17.485 − 38 =
  18. 18.177 − 56 =
  19. 19.168 − 19 =
  20. 20.390 − 56 =
  21. 21.163 − 79 =
  22. 22.509 − 37 =
  23. 23.263 − 78 =
  24. 24.241 − 99 =
  25. 25.445 − 26 =
  26. 26.591 − 78 =
  27. 27.298 − 56 =
  28. 28.420 − 87 =
  29. 29.467 − 86 =
  30. 30.152 − 66 =
  31. 31.470 − 68 =
  32. 32.237 − 29 =
  33. 33.270 − 49 =
  34. 34.467 − 19 =
  35. 35.572 − 16 =
  36. 36.158 − 66 =
  37. 37.481 − 87 =
  38. 38.164 − 98 =
  39. 39.77 − 37 =
  40. 40.224 − 86 =

Answer key

  1. 294
  2. 34
  3. 161
  4. 51
  5. 540
  6. 272
  7. 239
  8. 109
  9. 456
  10. 433
  11. 270
  12. 31
  13. 260
  14. 172
  15. 395
  16. 124
  17. 447
  18. 121
  19. 149
  20. 334
  21. 84
  22. 472
  23. 185
  24. 142
  25. 419
  26. 513
  27. 242
  28. 333
  29. 381
  30. 86
  31. 402
  32. 208
  33. 221
  34. 448
  35. 556
  36. 92
  37. 394
  38. 66
  39. 40
  40. 138

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