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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 4 · 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. 1.0.93 × 1.8 — where does the decimal point go? (a) 1.674 (b) 0.1674 (c) 0.01674 (d) 16.74
  2. 2.2.3 × 23 — where does the decimal point go? (a) 5.29 (b) 529 (c) 0.529 (d) 52.9
  3. 3.1.9 × 0.6 — where does the decimal point go? (a) 1.14 (b) 0.114 (c) 0.0114 (d) 11.4
  4. 4.0.71 × 2.7 — where does the decimal point go? (a) 0.01917 (b) 0.1917 (c) 19.17 (d) 1.917
  5. 5.0.33 × 0.6 — where does the decimal point go? (a) 0.00198 (b) 1.98 (c) 0.0198 (d) 0.198
  6. 6.0.88 × 6 — where does the decimal point go? (a) 5.28 (b) 0.0528 (c) 52.8 (d) 0.528
  7. 7.3.6 × 8 — where does the decimal point go? (a) 0.288 (b) 28.8 (c) 2.88 (d) 288
  8. 8.0.71 × 2 — where does the decimal point go? (a) 1.42 (b) 14.2 (c) 0.0142 (d) 0.142
  9. 9.7.1 × 4.6 — where does the decimal point go? (a) 32.66 (b) 0.3266 (c) 326.6 (d) 3.266
  10. 10.7.3 × 1.6 — where does the decimal point go? (a) 1.168 (b) 11.68 (c) 116.8 (d) 0.1168
  11. 11.0.32 × 3 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 0.96 (d) 9.6
  12. 12.8.7 × 0.9 — where does the decimal point go? (a) 7.83 (b) 78.3 (c) 0.0783 (d) 0.783
  13. 13.0.25 × 33 — where does the decimal point go? (a) 0.0825 (b) 8.25 (c) 82.5 (d) 0.825
  14. 14.6.4 × 7 — where does the decimal point go? (a) 4.48 (b) 44.8 (c) 0.448 (d) 448
  15. 15.0.93 × 31 — where does the decimal point go? (a) 0.2883 (b) 288.3 (c) 28.83 (d) 2.883
  16. 16.7.6 × 4.2 — where does the decimal point go? (a) 319.2 (b) 0.3192 (c) 31.92 (d) 3.192
  17. 17.7.9 × 4.3 — where does the decimal point go? (a) 0.3397 (b) 3.397 (c) 33.97 (d) 339.7
  18. 18.5.9 × 2 — where does the decimal point go? (a) 1.18 (b) 118 (c) 0.118 (d) 11.8
  19. 19.0.91 × 9 — where does the decimal point go? (a) 0.819 (b) 81.9 (c) 8.19 (d) 0.0819
  20. 20.0.84 × 36 — where does the decimal point go? (a) 0.3024 (b) 30.24 (c) 3.024 (d) 302.4
  21. 21.9.4 × 48 — where does the decimal point go? (a) 4512 (b) 451.2 (c) 45.12 (d) 4.512
  22. 22.3.7 × 5 — where does the decimal point go? (a) 18.5 (b) 185 (c) 1.85 (d) 0.185
  23. 23.0.57 × 0.2 — where does the decimal point go? (a) 1.14 (b) 0.00114 (c) 0.114 (d) 0.0114
  24. 24.4.4 × 0.4 — where does the decimal point go? (a) 0.176 (b) 0.0176 (c) 17.6 (d) 1.76
  25. 25.0.22 × 2.4 — where does the decimal point go? (a) 0.0528 (b) 0.00528 (c) 5.28 (d) 0.528
  26. 26.5.3 × 0.6 — where does the decimal point go? (a) 3.18 (b) 0.318 (c) 0.0318 (d) 31.8
  27. 27.0.29 × 0.2 — where does the decimal point go? (a) 0.058 (b) 0.58 (c) 0.0058 (d) 0.00058
  28. 28.0.74 × 4.6 — where does the decimal point go? (a) 0.3404 (b) 34.04 (c) 3.404 (d) 0.03404
  29. 29.0.12 × 4.1 — where does the decimal point go? (a) 0.00492 (b) 4.92 (c) 0.492 (d) 0.0492
  30. 30.7.3 × 0.8 — where does the decimal point go? (a) 5.84 (b) 0.0584 (c) 0.584 (d) 58.4
  31. 31.0.91 × 6 — where does the decimal point go? (a) 54.6 (b) 5.46 (c) 0.0546 (d) 0.546
  32. 32.0.53 × 3 — where does the decimal point go? (a) 0.0159 (b) 1.59 (c) 0.159 (d) 15.9
  33. 33.0.21 × 4.1 — where does the decimal point go? (a) 0.0861 (b) 0.00861 (c) 0.861 (d) 8.61
  34. 34.6.9 × 0.5 — where does the decimal point go? (a) 0.0345 (b) 34.5 (c) 0.345 (d) 3.45
  35. 35.0.71 × 8 — where does the decimal point go? (a) 56.8 (b) 0.568 (c) 0.0568 (d) 5.68
  36. 36.9.1 × 3.9 — where does the decimal point go? (a) 354.9 (b) 0.3549 (c) 3.549 (d) 35.49
  37. 37.3.3 × 9 — where does the decimal point go? (a) 297 (b) 2.97 (c) 0.297 (d) 29.7
  38. 38.5.8 × 29 — where does the decimal point go? (a) 16.82 (b) 1682 (c) 168.2 (d) 1.682
  39. 39.7.9 × 2 — where does the decimal point go? (a) 1.58 (b) 158 (c) 0.158 (d) 15.8
  40. 40.8.1 × 9 — where does the decimal point go? (a) 729 (b) 0.729 (c) 7.29 (d) 72.9

Answer key

  1. 1.674
  2. 52.9
  3. 1.14
  4. 1.917
  5. 0.198
  6. 5.28
  7. 28.8
  8. 1.42
  9. 32.66
  10. 11.68
  11. 0.96
  12. 7.83
  13. 8.25
  14. 44.8
  15. 28.83
  16. 31.92
  17. 33.97
  18. 11.8
  19. 8.19
  20. 30.24
  21. 451.2
  22. 18.5
  23. 0.114
  24. 1.76
  25. 0.528
  26. 3.18
  27. 0.058
  28. 3.404
  29. 0.492
  30. 5.84
  31. 5.46
  32. 1.59
  33. 0.861
  34. 3.45
  35. 5.68
  36. 35.49
  37. 29.7
  38. 168.2
  39. 15.8
  40. 72.9

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