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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 479 · 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. 1.134 − 37 =
  2. 2.196 − 36 =
  3. 3.540 − 19 =
  4. 4.233 − 66 =
  5. 5.387 − 68 =
  6. 6.266 − 29 =
  7. 7.205 − 87 =
  8. 8.310 − 86 =
  9. 9.190 − 36 =
  10. 10.529 − 99 =
  11. 11.293 − 47 =
  12. 12.566 − 79 =
  13. 13.570 − 79 =
  14. 14.191 − 78 =
  15. 15.560 − 96 =
  16. 16.101 − 76 =
  17. 17.174 − 96 =
  18. 18.430 − 96 =
  19. 19.452 − 18 =
  20. 20.488 − 37 =
  21. 21.199 − 46 =
  22. 22.265 − 76 =
  23. 23.241 − 99 =
  24. 24.174 − 16 =
  25. 25.343 − 58 =
  26. 26.165 − 47 =
  27. 27.481 − 16 =
  28. 28.370 − 97 =
  29. 29.532 − 28 =
  30. 30.118 − 97 =
  31. 31.265 − 67 =
  32. 32.130 − 48 =
  33. 33.102 − 46 =
  34. 34.564 − 48 =
  35. 35.177 − 88 =
  36. 36.432 − 96 =
  37. 37.342 − 77 =
  38. 38.233 − 16 =
  39. 39.322 − 58 =
  40. 40.340 − 17 =

Answer key

  1. 97
  2. 160
  3. 521
  4. 167
  5. 319
  6. 237
  7. 118
  8. 224
  9. 154
  10. 430
  11. 246
  12. 487
  13. 491
  14. 113
  15. 464
  16. 25
  17. 78
  18. 334
  19. 434
  20. 451
  21. 153
  22. 189
  23. 142
  24. 158
  25. 285
  26. 118
  27. 465
  28. 273
  29. 504
  30. 21
  31. 198
  32. 82
  33. 56
  34. 516
  35. 89
  36. 336
  37. 265
  38. 217
  39. 264
  40. 323

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