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Subtraction Trick Worksheet

Speed calculation lesson 3: Same-change subtraction · Set 150 · 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. 1.65 − 27 =
  2. 2.390 − 76 =
  3. 3.223 − 17 =
  4. 4.385 − 57 =
  5. 5.198 − 56 =
  6. 6.184 − 36 =
  7. 7.185 − 98 =
  8. 8.274 − 26 =
  9. 9.160 − 87 =
  10. 10.457 − 78 =
  11. 11.84 − 66 =
  12. 12.131 − 58 =
  13. 13.538 − 69 =
  14. 14.410 − 39 =
  15. 15.216 − 26 =
  16. 16.561 − 97 =
  17. 17.462 − 67 =
  18. 18.410 − 17 =
  19. 19.305 − 88 =
  20. 20.316 − 57 =
  21. 21.565 − 89 =
  22. 22.55 − 18 =
  23. 23.146 − 37 =
  24. 24.462 − 97 =
  25. 25.537 − 37 =
  26. 26.527 − 16 =
  27. 27.229 − 39 =
  28. 28.215 − 46 =
  29. 29.128 − 76 =
  30. 30.338 − 67 =
  31. 31.177 − 97 =
  32. 32.207 − 79 =
  33. 33.164 − 89 =
  34. 34.96 − 89 =
  35. 35.441 − 76 =
  36. 36.457 − 17 =
  37. 37.139 − 47 =
  38. 38.242 − 37 =
  39. 39.410 − 38 =
  40. 40.119 − 59 =

Answer key

  1. 38
  2. 314
  3. 206
  4. 328
  5. 142
  6. 148
  7. 87
  8. 248
  9. 73
  10. 379
  11. 18
  12. 73
  13. 469
  14. 371
  15. 190
  16. 464
  17. 395
  18. 393
  19. 217
  20. 259
  21. 476
  22. 37
  23. 109
  24. 365
  25. 500
  26. 511
  27. 190
  28. 169
  29. 52
  30. 271
  31. 80
  32. 128
  33. 75
  34. 7
  35. 365
  36. 440
  37. 92
  38. 205
  39. 372
  40. 60

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