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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 476 · 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. 1.0.95 × 7 — where does the decimal point go? (a) 0.665 (b) 66.5 (c) 6.65 (d) 0.0665
  2. 2.4.4 × 0.3 — where does the decimal point go? (a) 0.0132 (b) 0.132 (c) 13.2 (d) 1.32
  3. 3.0.32 × 0.6 — where does the decimal point go? (a) 0.0192 (b) 0.192 (c) 1.92 (d) 0.00192
  4. 4.0.89 × 0.9 — where does the decimal point go? (a) 0.00801 (b) 0.0801 (c) 0.801 (d) 8.01
  5. 5.3.9 × 0.3 — where does the decimal point go? (a) 1.17 (b) 0.117 (c) 11.7 (d) 0.0117
  6. 6.0.19 × 0.4 — where does the decimal point go? (a) 0.76 (b) 0.00076 (c) 0.076 (d) 0.0076
  7. 7.3.7 × 1.1 — where does the decimal point go? (a) 0.0407 (b) 4.07 (c) 0.407 (d) 40.7
  8. 8.3.9 × 29 — where does the decimal point go? (a) 11.31 (b) 1131 (c) 1.131 (d) 113.1
  9. 9.0.97 × 8 — where does the decimal point go? (a) 77.6 (b) 0.0776 (c) 0.776 (d) 7.76
  10. 10.6.2 × 8 — where does the decimal point go? (a) 0.496 (b) 4.96 (c) 49.6 (d) 496
  11. 11.0.29 × 13 — where does the decimal point go? (a) 0.377 (b) 0.0377 (c) 37.7 (d) 3.77
  12. 12.0.66 × 24 — where does the decimal point go? (a) 0.1584 (b) 1.584 (c) 158.4 (d) 15.84
  13. 13.5.3 × 37 — where does the decimal point go? (a) 196.1 (b) 19.61 (c) 1.961 (d) 1961
  14. 14.3.9 × 2.8 — where does the decimal point go? (a) 0.1092 (b) 1.092 (c) 109.2 (d) 10.92
  15. 15.0.22 × 2.9 — where does the decimal point go? (a) 0.638 (b) 0.00638 (c) 6.38 (d) 0.0638
  16. 16.5.6 × 3 — where does the decimal point go? (a) 16.8 (b) 0.168 (c) 1.68 (d) 168
  17. 17.5.6 × 0.7 — where does the decimal point go? (a) 0.392 (b) 3.92 (c) 39.2 (d) 0.0392
  18. 18.2.2 × 3.9 — where does the decimal point go? (a) 0.858 (b) 0.0858 (c) 8.58 (d) 85.8
  19. 19.0.23 × 0.7 — where does the decimal point go? (a) 0.0161 (b) 0.161 (c) 0.00161 (d) 1.61
  20. 20.0.63 × 1.1 — where does the decimal point go? (a) 0.0693 (b) 0.00693 (c) 6.93 (d) 0.693
  21. 21.4.3 × 48 — where does the decimal point go? (a) 20.64 (b) 2.064 (c) 2064 (d) 206.4
  22. 22.2.8 × 23 — where does the decimal point go? (a) 64.4 (b) 644 (c) 0.644 (d) 6.44
  23. 23.5.7 × 2 — where does the decimal point go? (a) 114 (b) 0.114 (c) 1.14 (d) 11.4
  24. 24.0.27 × 0.3 — where does the decimal point go? (a) 0.00081 (b) 0.0081 (c) 0.81 (d) 0.081
  25. 25.0.17 × 2 — where does the decimal point go? (a) 0.0034 (b) 0.34 (c) 3.4 (d) 0.034
  26. 26.0.79 × 2.6 — where does the decimal point go? (a) 2.054 (b) 0.2054 (c) 0.02054 (d) 20.54
  27. 27.0.91 × 2.3 — where does the decimal point go? (a) 0.2093 (b) 0.02093 (c) 2.093 (d) 20.93
  28. 28.7.1 × 2.9 — where does the decimal point go? (a) 20.59 (b) 2.059 (c) 205.9 (d) 0.2059
  29. 29.0.81 × 0.6 — where does the decimal point go? (a) 0.00486 (b) 0.0486 (c) 4.86 (d) 0.486
  30. 30.9.6 × 4.1 — where does the decimal point go? (a) 393.6 (b) 0.3936 (c) 39.36 (d) 3.936
  31. 31.3.3 × 2.6 — where does the decimal point go? (a) 8.58 (b) 0.0858 (c) 85.8 (d) 0.858
  32. 32.8.7 × 2 — where does the decimal point go? (a) 1.74 (b) 174 (c) 0.174 (d) 17.4
  33. 33.0.92 × 0.8 — where does the decimal point go? (a) 0.736 (b) 0.0736 (c) 0.00736 (d) 7.36
  34. 34.4.8 × 6 — where does the decimal point go? (a) 28.8 (b) 2.88 (c) 288 (d) 0.288
  35. 35.6.1 × 1.1 — where does the decimal point go? (a) 67.1 (b) 6.71 (c) 0.0671 (d) 0.671
  36. 36.0.49 × 6 — where does the decimal point go? (a) 29.4 (b) 0.0294 (c) 0.294 (d) 2.94
  37. 37.0.28 × 21 — where does the decimal point go? (a) 58.8 (b) 0.0588 (c) 5.88 (d) 0.588
  38. 38.1.9 × 0.5 — where does the decimal point go? (a) 0.95 (b) 0.0095 (c) 9.5 (d) 0.095
  39. 39.0.73 × 47 — where does the decimal point go? (a) 3.431 (b) 0.3431 (c) 343.1 (d) 34.31
  40. 40.0.56 × 0.2 — where does the decimal point go? (a) 1.12 (b) 0.00112 (c) 0.0112 (d) 0.112

Answer key

  1. 6.65
  2. 1.32
  3. 0.192
  4. 0.801
  5. 1.17
  6. 0.076
  7. 4.07
  8. 113.1
  9. 7.76
  10. 49.6
  11. 3.77
  12. 15.84
  13. 196.1
  14. 10.92
  15. 0.638
  16. 16.8
  17. 3.92
  18. 8.58
  19. 0.161
  20. 0.693
  21. 206.4
  22. 64.4
  23. 11.4
  24. 0.081
  25. 0.34
  26. 2.054
  27. 2.093
  28. 20.59
  29. 0.486
  30. 39.36
  31. 8.58
  32. 17.4
  33. 0.736
  34. 28.8
  35. 6.71
  36. 2.94
  37. 5.88
  38. 0.95
  39. 34.31
  40. 0.112

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