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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 954 · 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. 1.5.8 × 2 — where does the decimal point go? (a) 1.16 (b) 116 (c) 11.6 (d) 0.116
  2. 2.3.2 × 0.2 — where does the decimal point go? (a) 0.064 (b) 0.64 (c) 6.4 (d) 0.0064
  3. 3.8.9 × 8 — where does the decimal point go? (a) 7.12 (b) 712 (c) 0.712 (d) 71.2
  4. 4.9.2 × 3 — where does the decimal point go? (a) 2.76 (b) 0.276 (c) 276 (d) 27.6
  5. 5.7.9 × 0.5 — where does the decimal point go? (a) 3.95 (b) 0.395 (c) 39.5 (d) 0.0395
  6. 6.0.75 × 4.5 — where does the decimal point go? (a) 33.75 (b) 3.375 (c) 0.03375 (d) 0.3375
  7. 7.5.1 × 6 — where does the decimal point go? (a) 306 (b) 30.6 (c) 3.06 (d) 0.306
  8. 8.8.2 × 4.1 — where does the decimal point go? (a) 33.62 (b) 3.362 (c) 0.3362 (d) 336.2
  9. 9.0.83 × 48 — where does the decimal point go? (a) 39.84 (b) 0.3984 (c) 3.984 (d) 398.4
  10. 10.0.15 × 1.5 — where does the decimal point go? (a) 0.0225 (b) 0.00225 (c) 2.25 (d) 0.225
  11. 11.1.8 × 9 — where does the decimal point go? (a) 0.162 (b) 1.62 (c) 16.2 (d) 162
  12. 12.3.3 × 5 — where does the decimal point go? (a) 165 (b) 1.65 (c) 0.165 (d) 16.5
  13. 13.0.84 × 7 — where does the decimal point go? (a) 5.88 (b) 0.0588 (c) 0.588 (d) 58.8
  14. 14.0.53 × 6 — where does the decimal point go? (a) 3.18 (b) 0.0318 (c) 0.318 (d) 31.8
  15. 15.0.42 × 9 — where does the decimal point go? (a) 0.378 (b) 3.78 (c) 37.8 (d) 0.0378
  16. 16.0.93 × 4.6 — where does the decimal point go? (a) 4.278 (b) 0.4278 (c) 0.04278 (d) 42.78
  17. 17.8.1 × 4.8 — where does the decimal point go? (a) 38.88 (b) 0.3888 (c) 388.8 (d) 3.888
  18. 18.0.25 × 0.5 — where does the decimal point go? (a) 0.125 (b) 0.00125 (c) 1.25 (d) 0.0125
  19. 19.7.7 × 8 — where does the decimal point go? (a) 6.16 (b) 61.6 (c) 0.616 (d) 616
  20. 20.0.91 × 47 — where does the decimal point go? (a) 4.277 (b) 42.77 (c) 0.4277 (d) 427.7
  21. 21.2.1 × 0.5 — where does the decimal point go? (a) 0.0105 (b) 0.105 (c) 1.05 (d) 10.5
  22. 22.0.36 × 44 — where does the decimal point go? (a) 1.584 (b) 15.84 (c) 158.4 (d) 0.1584
  23. 23.0.22 × 11 — where does the decimal point go? (a) 0.0242 (b) 0.242 (c) 24.2 (d) 2.42
  24. 24.0.91 × 4.2 — where does the decimal point go? (a) 3.822 (b) 0.3822 (c) 38.22 (d) 0.03822
  25. 25.6.9 × 6 — where does the decimal point go? (a) 41.4 (b) 414 (c) 4.14 (d) 0.414
  26. 26.2.1 × 42 — where does the decimal point go? (a) 0.882 (b) 882 (c) 8.82 (d) 88.2
  27. 27.0.74 × 6 — where does the decimal point go? (a) 0.0444 (b) 4.44 (c) 0.444 (d) 44.4
  28. 28.0.17 × 13 — where does the decimal point go? (a) 0.0221 (b) 0.221 (c) 22.1 (d) 2.21
  29. 29.0.87 × 19 — where does the decimal point go? (a) 16.53 (b) 1.653 (c) 0.1653 (d) 165.3
  30. 30.9.9 × 3.2 — where does the decimal point go? (a) 0.3168 (b) 316.8 (c) 31.68 (d) 3.168
  31. 31.0.93 × 19 — where does the decimal point go? (a) 17.67 (b) 1.767 (c) 176.7 (d) 0.1767
  32. 32.9.2 × 0.9 — where does the decimal point go? (a) 0.828 (b) 0.0828 (c) 82.8 (d) 8.28
  33. 33.0.39 × 1.9 — where does the decimal point go? (a) 0.0741 (b) 0.00741 (c) 7.41 (d) 0.741
  34. 34.2.9 × 0.2 — where does the decimal point go? (a) 0.0058 (b) 0.58 (c) 0.058 (d) 5.8
  35. 35.0.81 × 0.9 — where does the decimal point go? (a) 0.0729 (b) 7.29 (c) 0.729 (d) 0.00729
  36. 36.0.94 × 0.4 — where does the decimal point go? (a) 0.376 (b) 0.0376 (c) 3.76 (d) 0.00376
  37. 37.0.83 × 0.5 — where does the decimal point go? (a) 0.415 (b) 0.0415 (c) 0.00415 (d) 4.15
  38. 38.7.7 × 26 — where does the decimal point go? (a) 20.02 (b) 2.002 (c) 200.2 (d) 2002
  39. 39.0.87 × 22 — where does the decimal point go? (a) 0.1914 (b) 19.14 (c) 1.914 (d) 191.4
  40. 40.0.36 × 33 — where does the decimal point go? (a) 0.1188 (b) 11.88 (c) 118.8 (d) 1.188

Answer key

  1. 11.6
  2. 0.64
  3. 71.2
  4. 27.6
  5. 3.95
  6. 3.375
  7. 30.6
  8. 33.62
  9. 39.84
  10. 0.225
  11. 16.2
  12. 16.5
  13. 5.88
  14. 3.18
  15. 3.78
  16. 4.278
  17. 38.88
  18. 0.125
  19. 61.6
  20. 42.77
  21. 1.05
  22. 15.84
  23. 2.42
  24. 3.822
  25. 41.4
  26. 88.2
  27. 4.44
  28. 2.21
  29. 16.53
  30. 31.68
  31. 17.67
  32. 8.28
  33. 0.741
  34. 0.58
  35. 0.729
  36. 0.376
  37. 0.415
  38. 200.2
  39. 19.14
  40. 11.88

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