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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 897 · 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. 1.0.39 × 35 — where does the decimal point go? (a) 136.5 (b) 0.1365 (c) 1.365 (d) 13.65
  2. 2.0.79 × 4.5 — where does the decimal point go? (a) 0.03555 (b) 0.3555 (c) 35.55 (d) 3.555
  3. 3.8.7 × 1.3 — where does the decimal point go? (a) 0.1131 (b) 1.131 (c) 11.31 (d) 113.1
  4. 4.0.22 × 4 — where does the decimal point go? (a) 0.88 (b) 0.088 (c) 0.0088 (d) 8.8
  5. 5.0.32 × 0.6 — where does the decimal point go? (a) 0.0192 (b) 0.00192 (c) 0.192 (d) 1.92
  6. 6.0.59 × 27 — where does the decimal point go? (a) 0.1593 (b) 159.3 (c) 15.93 (d) 1.593
  7. 7.0.27 × 0.3 — where does the decimal point go? (a) 0.81 (b) 0.0081 (c) 0.081 (d) 0.00081
  8. 8.0.65 × 49 — where does the decimal point go? (a) 3.185 (b) 31.85 (c) 0.3185 (d) 318.5
  9. 9.0.48 × 13 — where does the decimal point go? (a) 6.24 (b) 0.624 (c) 0.0624 (d) 62.4
  10. 10.0.19 × 16 — where does the decimal point go? (a) 0.0304 (b) 3.04 (c) 0.304 (d) 30.4
  11. 11.4.4 × 2 — where does the decimal point go? (a) 0.88 (b) 0.088 (c) 88 (d) 8.8
  12. 12.9.9 × 2 — where does the decimal point go? (a) 1.98 (b) 198 (c) 0.198 (d) 19.8
  13. 13.0.14 × 2.7 — where does the decimal point go? (a) 0.0378 (b) 0.378 (c) 0.00378 (d) 3.78
  14. 14.0.93 × 5 — where does the decimal point go? (a) 46.5 (b) 0.465 (c) 0.0465 (d) 4.65
  15. 15.0.89 × 0.5 — where does the decimal point go? (a) 0.0445 (b) 4.45 (c) 0.445 (d) 0.00445
  16. 16.4.1 × 1.3 — where does the decimal point go? (a) 5.33 (b) 0.0533 (c) 53.3 (d) 0.533
  17. 17.0.94 × 8 — where does the decimal point go? (a) 7.52 (b) 0.0752 (c) 0.752 (d) 75.2
  18. 18.3.4 × 0.9 — where does the decimal point go? (a) 0.306 (b) 30.6 (c) 0.0306 (d) 3.06
  19. 19.9.4 × 21 — where does the decimal point go? (a) 19.74 (b) 1974 (c) 1.974 (d) 197.4
  20. 20.9.8 × 3.6 — where does the decimal point go? (a) 35.28 (b) 3.528 (c) 352.8 (d) 0.3528
  21. 21.0.94 × 7 — where does the decimal point go? (a) 65.8 (b) 0.658 (c) 6.58 (d) 0.0658
  22. 22.6.9 × 0.5 — where does the decimal point go? (a) 3.45 (b) 0.0345 (c) 0.345 (d) 34.5
  23. 23.0.87 × 0.3 — where does the decimal point go? (a) 0.261 (b) 2.61 (c) 0.00261 (d) 0.0261
  24. 24.7.6 × 8 — where does the decimal point go? (a) 0.608 (b) 60.8 (c) 6.08 (d) 608
  25. 25.0.78 × 0.8 — where does the decimal point go? (a) 0.0624 (b) 6.24 (c) 0.624 (d) 0.00624
  26. 26.0.55 × 7 — where does the decimal point go? (a) 0.0385 (b) 38.5 (c) 3.85 (d) 0.385
  27. 27.0.98 × 1.9 — where does the decimal point go? (a) 0.1862 (b) 18.62 (c) 1.862 (d) 0.01862
  28. 28.1.3 × 0.9 — where does the decimal point go? (a) 1.17 (b) 0.117 (c) 0.0117 (d) 11.7
  29. 29.1.6 × 1.2 — where does the decimal point go? (a) 1.92 (b) 0.0192 (c) 0.192 (d) 19.2
  30. 30.7.4 × 9 — where does the decimal point go? (a) 66.6 (b) 666 (c) 6.66 (d) 0.666
  31. 31.9.8 × 4.2 — where does the decimal point go? (a) 0.4116 (b) 411.6 (c) 4.116 (d) 41.16
  32. 32.5.5 × 0.9 — where does the decimal point go? (a) 0.495 (b) 4.95 (c) 0.0495 (d) 49.5
  33. 33.0.12 × 7 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.084 (d) 0.0084
  34. 34.4.5 × 0.5 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 0.0225 (d) 22.5
  35. 35.0.24 × 2 — where does the decimal point go? (a) 0.48 (b) 4.8 (c) 0.0048 (d) 0.048
  36. 36.3.3 × 6 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 19.8 (d) 198
  37. 37.3.4 × 6 — where does the decimal point go? (a) 2.04 (b) 204 (c) 0.204 (d) 20.4
  38. 38.9.3 × 5 — where does the decimal point go? (a) 4.65 (b) 465 (c) 46.5 (d) 0.465
  39. 39.0.22 × 21 — where does the decimal point go? (a) 4.62 (b) 46.2 (c) 0.462 (d) 0.0462
  40. 40.9.8 × 0.7 — where does the decimal point go? (a) 0.686 (b) 6.86 (c) 68.6 (d) 0.0686

Answer key

  1. 13.65
  2. 3.555
  3. 11.31
  4. 0.88
  5. 0.192
  6. 15.93
  7. 0.081
  8. 31.85
  9. 6.24
  10. 3.04
  11. 8.8
  12. 19.8
  13. 0.378
  14. 4.65
  15. 0.445
  16. 5.33
  17. 7.52
  18. 3.06
  19. 197.4
  20. 35.28
  21. 6.58
  22. 3.45
  23. 0.261
  24. 60.8
  25. 0.624
  26. 3.85
  27. 1.862
  28. 1.17
  29. 1.92
  30. 66.6
  31. 41.16
  32. 4.95
  33. 0.84
  34. 2.25
  35. 0.48
  36. 19.8
  37. 20.4
  38. 46.5
  39. 4.62
  40. 6.86

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