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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 643 · 40 questions
TalentJR

The trick (Count the places): Forget the points and multiply the whole numbers. Count all the digits after the points in the question. Put the point that many places from the right, then check by rounding.

NameDateTime takenScore ___ / 40
  1. 1.0.21 × 41 — where does the decimal point go? (a) 0.0861 (b) 0.861 (c) 8.61 (d) 86.1
  2. 2.0.79 × 34 — where does the decimal point go? (a) 268.6 (b) 2.686 (c) 26.86 (d) 0.2686
  3. 3.0.25 × 19 — where does the decimal point go? (a) 4.75 (b) 47.5 (c) 0.0475 (d) 0.475
  4. 4.0.56 × 2.4 — where does the decimal point go? (a) 1.344 (b) 0.01344 (c) 0.1344 (d) 13.44
  5. 5.0.73 × 4.6 — where does the decimal point go? (a) 33.58 (b) 0.03358 (c) 0.3358 (d) 3.358
  6. 6.0.55 × 0.9 — where does the decimal point go? (a) 0.0495 (b) 0.00495 (c) 0.495 (d) 4.95
  7. 7.0.16 × 7 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 0.0112 (d) 0.112
  8. 8.3.7 × 4 — where does the decimal point go? (a) 14.8 (b) 0.148 (c) 148 (d) 1.48
  9. 9.1.3 × 0.2 — where does the decimal point go? (a) 0.26 (b) 0.026 (c) 0.0026 (d) 2.6
  10. 10.8.8 × 3.1 — where does the decimal point go? (a) 0.2728 (b) 27.28 (c) 272.8 (d) 2.728
  11. 11.0.27 × 2.1 — where does the decimal point go? (a) 0.567 (b) 0.0567 (c) 0.00567 (d) 5.67
  12. 12.0.39 × 31 — where does the decimal point go? (a) 12.09 (b) 0.1209 (c) 1.209 (d) 120.9
  13. 13.0.28 × 26 — where does the decimal point go? (a) 7.28 (b) 72.8 (c) 0.728 (d) 0.0728
  14. 14.5.2 × 8 — where does the decimal point go? (a) 0.416 (b) 416 (c) 41.6 (d) 4.16
  15. 15.6.5 × 45 — where does the decimal point go? (a) 2925 (b) 29.25 (c) 2.925 (d) 292.5
  16. 16.0.97 × 14 — where does the decimal point go? (a) 135.8 (b) 0.1358 (c) 1.358 (d) 13.58
  17. 17.0.61 × 3 — where does the decimal point go? (a) 0.183 (b) 18.3 (c) 0.0183 (d) 1.83
  18. 18.0.73 × 9 — where does the decimal point go? (a) 65.7 (b) 0.0657 (c) 0.657 (d) 6.57
  19. 19.0.66 × 0.7 — where does the decimal point go? (a) 0.462 (b) 0.0462 (c) 4.62 (d) 0.00462
  20. 20.0.66 × 0.4 — where does the decimal point go? (a) 0.00264 (b) 0.0264 (c) 2.64 (d) 0.264
  21. 21.0.22 × 1.7 — where does the decimal point go? (a) 0.0374 (b) 0.00374 (c) 0.374 (d) 3.74
  22. 22.0.37 × 1.1 — where does the decimal point go? (a) 0.0407 (b) 0.407 (c) 0.00407 (d) 4.07
  23. 23.0.36 × 4 — where does the decimal point go? (a) 0.0144 (b) 14.4 (c) 1.44 (d) 0.144
  24. 24.0.63 × 1.3 — where does the decimal point go? (a) 0.0819 (b) 8.19 (c) 0.00819 (d) 0.819
  25. 25.0.83 × 0.7 — where does the decimal point go? (a) 0.581 (b) 0.00581 (c) 0.0581 (d) 5.81
  26. 26.0.63 × 1.5 — where does the decimal point go? (a) 0.00945 (b) 0.0945 (c) 9.45 (d) 0.945
  27. 27.3.5 × 3 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 105 (d) 10.5
  28. 28.0.97 × 3.5 — where does the decimal point go? (a) 3.395 (b) 0.03395 (c) 0.3395 (d) 33.95
  29. 29.2.2 × 19 — where does the decimal point go? (a) 0.418 (b) 41.8 (c) 4.18 (d) 418
  30. 30.1.4 × 4 — where does the decimal point go? (a) 56 (b) 5.6 (c) 0.56 (d) 0.056
  31. 31.9.6 × 9 — where does the decimal point go? (a) 864 (b) 8.64 (c) 86.4 (d) 0.864
  32. 32.6.1 × 0.8 — where does the decimal point go? (a) 0.488 (b) 4.88 (c) 48.8 (d) 0.0488
  33. 33.4.4 × 0.6 — where does the decimal point go? (a) 0.264 (b) 26.4 (c) 2.64 (d) 0.0264
  34. 34.7.6 × 2.8 — where does the decimal point go? (a) 21.28 (b) 0.2128 (c) 212.8 (d) 2.128
  35. 35.0.63 × 4.1 — where does the decimal point go? (a) 2.583 (b) 0.02583 (c) 25.83 (d) 0.2583
  36. 36.0.67 × 1.9 — where does the decimal point go? (a) 1.273 (b) 0.1273 (c) 0.01273 (d) 12.73
  37. 37.4.5 × 0.3 — where does the decimal point go? (a) 1.35 (b) 13.5 (c) 0.0135 (d) 0.135
  38. 38.0.88 × 0.3 — where does the decimal point go? (a) 2.64 (b) 0.0264 (c) 0.264 (d) 0.00264
  39. 39.0.93 × 44 — where does the decimal point go? (a) 0.4092 (b) 4.092 (c) 40.92 (d) 409.2
  40. 40.0.43 × 6 — where does the decimal point go? (a) 25.8 (b) 0.0258 (c) 0.258 (d) 2.58

Answer key

  1. 8.61
  2. 26.86
  3. 4.75
  4. 1.344
  5. 3.358
  6. 0.495
  7. 1.12
  8. 14.8
  9. 0.26
  10. 27.28
  11. 0.567
  12. 12.09
  13. 7.28
  14. 41.6
  15. 292.5
  16. 13.58
  17. 1.83
  18. 6.57
  19. 0.462
  20. 0.264
  21. 0.374
  22. 0.407
  23. 1.44
  24. 0.819
  25. 0.581
  26. 0.945
  27. 10.5
  28. 3.395
  29. 41.8
  30. 5.6
  31. 86.4
  32. 4.88
  33. 2.64
  34. 21.28
  35. 2.583
  36. 1.273
  37. 1.35
  38. 0.264
  39. 40.92
  40. 2.58

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