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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 371 · 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. 1.173 − 76 =
  2. 2.319 − 79 =
  3. 3.371 − 97 =
  4. 4.295 − 18 =
  5. 5.441 − 69 =
  6. 6.175 − 77 =
  7. 7.92 − 36 =
  8. 8.433 − 29 =
  9. 9.210 − 66 =
  10. 10.90 − 46 =
  11. 11.77 − 76 =
  12. 12.439 − 77 =
  13. 13.304 − 89 =
  14. 14.182 − 17 =
  15. 15.246 − 96 =
  16. 16.156 − 66 =
  17. 17.520 − 68 =
  18. 18.165 − 79 =
  19. 19.348 − 37 =
  20. 20.333 − 16 =
  21. 21.149 − 78 =
  22. 22.539 − 69 =
  23. 23.157 − 98 =
  24. 24.386 − 69 =
  25. 25.481 − 56 =
  26. 26.498 − 68 =
  27. 27.187 − 39 =
  28. 28.554 − 97 =
  29. 29.143 − 37 =
  30. 30.152 − 66 =
  31. 31.133 − 58 =
  32. 32.143 − 26 =
  33. 33.572 − 38 =
  34. 34.159 − 19 =
  35. 35.101 − 89 =
  36. 36.97 − 69 =
  37. 37.365 − 39 =
  38. 38.205 − 47 =
  39. 39.175 − 79 =
  40. 40.349 − 97 =

Answer key

  1. 97
  2. 240
  3. 274
  4. 277
  5. 372
  6. 98
  7. 56
  8. 404
  9. 144
  10. 44
  11. 1
  12. 362
  13. 215
  14. 165
  15. 150
  16. 90
  17. 452
  18. 86
  19. 311
  20. 317
  21. 71
  22. 470
  23. 59
  24. 317
  25. 425
  26. 430
  27. 148
  28. 457
  29. 106
  30. 86
  31. 75
  32. 117
  33. 534
  34. 140
  35. 12
  36. 28
  37. 326
  38. 158
  39. 96
  40. 252

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