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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 29 · 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. 1.132 − 49 =
  2. 2.387 − 19 =
  3. 3.165 − 36 =
  4. 4.132 − 99 =
  5. 5.167 − 97 =
  6. 6.110 − 89 =
  7. 7.199 − 69 =
  8. 8.381 − 89 =
  9. 9.392 − 59 =
  10. 10.298 − 66 =
  11. 11.144 − 76 =
  12. 12.192 − 28 =
  13. 13.417 − 99 =
  14. 14.390 − 57 =
  15. 15.516 − 77 =
  16. 16.152 − 16 =
  17. 17.164 − 66 =
  18. 18.399 − 89 =
  19. 19.340 − 46 =
  20. 20.501 − 88 =
  21. 21.454 − 67 =
  22. 22.587 − 86 =
  23. 23.343 − 36 =
  24. 24.158 − 86 =
  25. 25.119 − 29 =
  26. 26.519 − 96 =
  27. 27.178 − 29 =
  28. 28.540 − 77 =
  29. 29.153 − 68 =
  30. 30.539 − 49 =
  31. 31.185 − 29 =
  32. 32.400 − 69 =
  33. 33.518 − 46 =
  34. 34.382 − 46 =
  35. 35.322 − 27 =
  36. 36.384 − 17 =
  37. 37.391 − 48 =
  38. 38.441 − 59 =
  39. 39.103 − 28 =
  40. 40.529 − 76 =

Answer key

  1. 83
  2. 368
  3. 129
  4. 33
  5. 70
  6. 21
  7. 130
  8. 292
  9. 333
  10. 232
  11. 68
  12. 164
  13. 318
  14. 333
  15. 439
  16. 136
  17. 98
  18. 310
  19. 294
  20. 413
  21. 387
  22. 501
  23. 307
  24. 72
  25. 90
  26. 423
  27. 149
  28. 463
  29. 85
  30. 490
  31. 156
  32. 331
  33. 472
  34. 336
  35. 295
  36. 367
  37. 343
  38. 382
  39. 75
  40. 453

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