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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 524 · 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. 1.155 − 97 =
  2. 2.558 − 96 =
  3. 3.277 − 37 =
  4. 4.236 − 58 =
  5. 5.153 − 77 =
  6. 6.512 − 97 =
  7. 7.380 − 19 =
  8. 8.220 − 88 =
  9. 9.153 − 38 =
  10. 10.365 − 28 =
  11. 11.402 − 38 =
  12. 12.174 − 76 =
  13. 13.175 − 99 =
  14. 14.206 − 17 =
  15. 15.475 − 39 =
  16. 16.498 − 89 =
  17. 17.437 − 47 =
  18. 18.182 − 88 =
  19. 19.207 − 38 =
  20. 20.110 − 99 =
  21. 21.493 − 39 =
  22. 22.266 − 56 =
  23. 23.106 − 26 =
  24. 24.202 − 56 =
  25. 25.100 − 37 =
  26. 26.150 − 38 =
  27. 27.503 − 57 =
  28. 28.538 − 16 =
  29. 29.239 − 17 =
  30. 30.113 − 37 =
  31. 31.104 − 48 =
  32. 32.147 − 27 =
  33. 33.116 − 89 =
  34. 34.449 − 48 =
  35. 35.245 − 57 =
  36. 36.206 − 69 =
  37. 37.390 − 87 =
  38. 38.115 − 58 =
  39. 39.244 − 16 =
  40. 40.156 − 18 =

Answer key

  1. 58
  2. 462
  3. 240
  4. 178
  5. 76
  6. 415
  7. 361
  8. 132
  9. 115
  10. 337
  11. 364
  12. 98
  13. 76
  14. 189
  15. 436
  16. 409
  17. 390
  18. 94
  19. 169
  20. 11
  21. 454
  22. 210
  23. 80
  24. 146
  25. 63
  26. 112
  27. 446
  28. 522
  29. 222
  30. 76
  31. 56
  32. 120
  33. 27
  34. 401
  35. 188
  36. 137
  37. 303
  38. 57
  39. 228
  40. 138

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