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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 25 · 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. 1.99 − 69 =
  2. 2.205 − 26 =
  3. 3.62 − 18 =
  4. 4.95 − 77 =
  5. 5.469 − 78 =
  6. 6.292 − 56 =
  7. 7.141 − 46 =
  8. 8.528 − 76 =
  9. 9.542 − 37 =
  10. 10.563 − 99 =
  11. 11.422 − 48 =
  12. 12.232 − 56 =
  13. 13.156 − 68 =
  14. 14.171 − 59 =
  15. 15.112 − 49 =
  16. 16.418 − 59 =
  17. 17.150 − 19 =
  18. 18.379 − 48 =
  19. 19.234 − 58 =
  20. 20.433 − 98 =
  21. 21.402 − 86 =
  22. 22.414 − 86 =
  23. 23.396 − 28 =
  24. 24.130 − 57 =
  25. 25.444 − 27 =
  26. 26.108 − 56 =
  27. 27.507 − 98 =
  28. 28.92 − 28 =
  29. 29.198 − 96 =
  30. 30.110 − 46 =
  31. 31.138 − 86 =
  32. 32.350 − 99 =
  33. 33.128 − 36 =
  34. 34.475 − 16 =
  35. 35.303 − 96 =
  36. 36.316 − 97 =
  37. 37.331 − 47 =
  38. 38.309 − 29 =
  39. 39.311 − 16 =
  40. 40.271 − 88 =

Answer key

  1. 30
  2. 179
  3. 44
  4. 18
  5. 391
  6. 236
  7. 95
  8. 452
  9. 505
  10. 464
  11. 374
  12. 176
  13. 88
  14. 112
  15. 63
  16. 359
  17. 131
  18. 331
  19. 176
  20. 335
  21. 316
  22. 328
  23. 368
  24. 73
  25. 417
  26. 52
  27. 409
  28. 64
  29. 102
  30. 64
  31. 52
  32. 251
  33. 92
  34. 459
  35. 207
  36. 219
  37. 284
  38. 280
  39. 295
  40. 183

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