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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 953 · 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. 1.174 − 49 =
  2. 2.248 − 56 =
  3. 3.494 − 86 =
  4. 4.214 − 19 =
  5. 5.374 − 89 =
  6. 6.107 − 16 =
  7. 7.506 − 99 =
  8. 8.141 − 49 =
  9. 9.116 − 49 =
  10. 10.341 − 47 =
  11. 11.188 − 67 =
  12. 12.559 − 26 =
  13. 13.575 − 88 =
  14. 14.313 − 16 =
  15. 15.149 − 97 =
  16. 16.518 − 47 =
  17. 17.563 − 36 =
  18. 18.251 − 99 =
  19. 19.479 − 48 =
  20. 20.527 − 16 =
  21. 21.411 − 26 =
  22. 22.596 − 99 =
  23. 23.518 − 76 =
  24. 24.408 − 99 =
  25. 25.436 − 56 =
  26. 26.479 − 29 =
  27. 27.145 − 76 =
  28. 28.401 − 29 =
  29. 29.223 − 49 =
  30. 30.115 − 17 =
  31. 31.479 − 66 =
  32. 32.557 − 48 =
  33. 33.101 − 29 =
  34. 34.590 − 56 =
  35. 35.183 − 16 =
  36. 36.67 − 19 =
  37. 37.489 − 58 =
  38. 38.392 − 58 =
  39. 39.218 − 28 =
  40. 40.361 − 56 =

Answer key

  1. 125
  2. 192
  3. 408
  4. 195
  5. 285
  6. 91
  7. 407
  8. 92
  9. 67
  10. 294
  11. 121
  12. 533
  13. 487
  14. 297
  15. 52
  16. 471
  17. 527
  18. 152
  19. 431
  20. 511
  21. 385
  22. 497
  23. 442
  24. 309
  25. 380
  26. 450
  27. 69
  28. 372
  29. 174
  30. 98
  31. 413
  32. 509
  33. 72
  34. 534
  35. 167
  36. 48
  37. 431
  38. 334
  39. 190
  40. 305

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