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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 886 · 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. 1.0.29 × 3.9 — where does the decimal point go? (a) 1.131 (b) 0.1131 (c) 0.01131 (d) 11.31
  2. 2.0.29 × 3.3 — where does the decimal point go? (a) 0.957 (b) 0.0957 (c) 9.57 (d) 0.00957
  3. 3.0.88 × 9 — where does the decimal point go? (a) 0.0792 (b) 0.792 (c) 79.2 (d) 7.92
  4. 4.0.35 × 9 — where does the decimal point go? (a) 0.315 (b) 0.0315 (c) 31.5 (d) 3.15
  5. 5.7.4 × 0.2 — where does the decimal point go? (a) 14.8 (b) 0.148 (c) 1.48 (d) 0.0148
  6. 6.4.4 × 11 — where does the decimal point go? (a) 484 (b) 4.84 (c) 48.4 (d) 0.484
  7. 7.7.2 × 0.9 — where does the decimal point go? (a) 0.0648 (b) 64.8 (c) 0.648 (d) 6.48
  8. 8.3.1 × 0.7 — where does the decimal point go? (a) 0.0217 (b) 0.217 (c) 2.17 (d) 21.7
  9. 9.9.3 × 3.5 — where does the decimal point go? (a) 3.255 (b) 32.55 (c) 325.5 (d) 0.3255
  10. 10.0.36 × 39 — where does the decimal point go? (a) 14.04 (b) 0.1404 (c) 1.404 (d) 140.4
  11. 11.9.3 × 9 — where does the decimal point go? (a) 0.837 (b) 8.37 (c) 83.7 (d) 837
  12. 12.0.16 × 37 — where does the decimal point go? (a) 0.0592 (b) 5.92 (c) 0.592 (d) 59.2
  13. 13.1.3 × 8 — where does the decimal point go? (a) 0.104 (b) 1.04 (c) 104 (d) 10.4
  14. 14.1.5 × 27 — where does the decimal point go? (a) 405 (b) 0.405 (c) 4.05 (d) 40.5
  15. 15.3.6 × 6 — where does the decimal point go? (a) 216 (b) 21.6 (c) 2.16 (d) 0.216
  16. 16.1.9 × 3.5 — where does the decimal point go? (a) 66.5 (b) 6.65 (c) 0.665 (d) 0.0665
  17. 17.2.8 × 31 — where does the decimal point go? (a) 86.8 (b) 0.868 (c) 868 (d) 8.68
  18. 18.0.59 × 0.8 — where does the decimal point go? (a) 0.00472 (b) 4.72 (c) 0.472 (d) 0.0472
  19. 19.0.22 × 27 — where does the decimal point go? (a) 0.0594 (b) 59.4 (c) 5.94 (d) 0.594
  20. 20.0.89 × 0.9 — where does the decimal point go? (a) 0.0801 (b) 0.801 (c) 8.01 (d) 0.00801
  21. 21.0.76 × 6 — where does the decimal point go? (a) 0.456 (b) 4.56 (c) 0.0456 (d) 45.6
  22. 22.0.81 × 0.7 — where does the decimal point go? (a) 0.0567 (b) 5.67 (c) 0.567 (d) 0.00567
  23. 23.0.17 × 0.6 — where does the decimal point go? (a) 0.00102 (b) 0.102 (c) 1.02 (d) 0.0102
  24. 24.0.56 × 0.8 — where does the decimal point go? (a) 4.48 (b) 0.448 (c) 0.00448 (d) 0.0448
  25. 25.1.6 × 39 — where does the decimal point go? (a) 6.24 (b) 0.624 (c) 62.4 (d) 624
  26. 26.0.89 × 29 — where does the decimal point go? (a) 0.2581 (b) 25.81 (c) 2.581 (d) 258.1
  27. 27.4.3 × 27 — where does the decimal point go? (a) 116.1 (b) 1.161 (c) 1161 (d) 11.61
  28. 28.5.7 × 38 — where does the decimal point go? (a) 2166 (b) 21.66 (c) 216.6 (d) 2.166
  29. 29.3.4 × 8 — where does the decimal point go? (a) 272 (b) 27.2 (c) 0.272 (d) 2.72
  30. 30.0.24 × 0.9 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 0.00216 (d) 0.0216
  31. 31.9.3 × 0.5 — where does the decimal point go? (a) 0.0465 (b) 46.5 (c) 0.465 (d) 4.65
  32. 32.1.6 × 42 — where does the decimal point go? (a) 672 (b) 0.672 (c) 6.72 (d) 67.2
  33. 33.0.92 × 7 — where does the decimal point go? (a) 6.44 (b) 0.644 (c) 0.0644 (d) 64.4
  34. 34.1.2 × 2.9 — where does the decimal point go? (a) 3.48 (b) 0.348 (c) 0.0348 (d) 34.8
  35. 35.0.88 × 1.1 — where does the decimal point go? (a) 0.968 (b) 0.00968 (c) 9.68 (d) 0.0968
  36. 36.9.3 × 0.7 — where does the decimal point go? (a) 6.51 (b) 0.651 (c) 0.0651 (d) 65.1
  37. 37.0.17 × 6 — where does the decimal point go? (a) 0.102 (b) 0.0102 (c) 1.02 (d) 10.2
  38. 38.5.1 × 2.3 — where does the decimal point go? (a) 0.1173 (b) 1.173 (c) 11.73 (d) 117.3
  39. 39.0.53 × 4.7 — where does the decimal point go? (a) 2.491 (b) 0.02491 (c) 0.2491 (d) 24.91
  40. 40.7.8 × 0.6 — where does the decimal point go? (a) 0.0468 (b) 0.468 (c) 4.68 (d) 46.8

Answer key

  1. 1.131
  2. 0.957
  3. 7.92
  4. 3.15
  5. 1.48
  6. 48.4
  7. 6.48
  8. 2.17
  9. 32.55
  10. 14.04
  11. 83.7
  12. 5.92
  13. 10.4
  14. 40.5
  15. 21.6
  16. 6.65
  17. 86.8
  18. 0.472
  19. 5.94
  20. 0.801
  21. 4.56
  22. 0.567
  23. 0.102
  24. 0.448
  25. 62.4
  26. 25.81
  27. 116.1
  28. 216.6
  29. 27.2
  30. 0.216
  31. 4.65
  32. 67.2
  33. 6.44
  34. 3.48
  35. 0.968
  36. 6.51
  37. 1.02
  38. 11.73
  39. 2.491
  40. 4.68

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