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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 28 · 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. 1.7.7 × 25 — where does the decimal point go? (a) 19.25 (b) 1925 (c) 1.925 (d) 192.5
  2. 2.2.3 × 3 — where does the decimal point go? (a) 0.069 (b) 6.9 (c) 0.69 (d) 69
  3. 3.6.1 × 0.7 — where does the decimal point go? (a) 0.0427 (b) 42.7 (c) 4.27 (d) 0.427
  4. 4.0.74 × 4.9 — where does the decimal point go? (a) 36.26 (b) 0.03626 (c) 0.3626 (d) 3.626
  5. 5.0.18 × 0.4 — where does the decimal point go? (a) 0.072 (b) 0.0072 (c) 0.72 (d) 0.00072
  6. 6.8.1 × 8 — where does the decimal point go? (a) 6.48 (b) 64.8 (c) 0.648 (d) 648
  7. 7.0.15 × 41 — where does the decimal point go? (a) 61.5 (b) 0.615 (c) 6.15 (d) 0.0615
  8. 8.5.3 × 7 — where does the decimal point go? (a) 3.71 (b) 371 (c) 0.371 (d) 37.1
  9. 9.0.76 × 0.3 — where does the decimal point go? (a) 0.0228 (b) 0.228 (c) 0.00228 (d) 2.28
  10. 10.1.5 × 19 — where does the decimal point go? (a) 28.5 (b) 2.85 (c) 285 (d) 0.285
  11. 11.5.9 × 8 — where does the decimal point go? (a) 47.2 (b) 4.72 (c) 472 (d) 0.472
  12. 12.0.89 × 2.1 — where does the decimal point go? (a) 1.869 (b) 18.69 (c) 0.01869 (d) 0.1869
  13. 13.5.3 × 4 — where does the decimal point go? (a) 2.12 (b) 0.212 (c) 21.2 (d) 212
  14. 14.7.1 × 2.3 — where does the decimal point go? (a) 1.633 (b) 0.1633 (c) 16.33 (d) 163.3
  15. 15.2.1 × 44 — where does the decimal point go? (a) 9.24 (b) 924 (c) 92.4 (d) 0.924
  16. 16.6.6 × 0.8 — where does the decimal point go? (a) 0.0528 (b) 0.528 (c) 52.8 (d) 5.28
  17. 17.0.14 × 1.3 — where does the decimal point go? (a) 0.0182 (b) 1.82 (c) 0.182 (d) 0.00182
  18. 18.5.5 × 13 — where does the decimal point go? (a) 7.15 (b) 71.5 (c) 0.715 (d) 715
  19. 19.1.6 × 6 — where does the decimal point go? (a) 0.096 (b) 96 (c) 0.96 (d) 9.6
  20. 20.0.72 × 3 — where does the decimal point go? (a) 0.216 (b) 0.0216 (c) 21.6 (d) 2.16
  21. 21.2.4 × 8 — where does the decimal point go? (a) 0.192 (b) 19.2 (c) 1.92 (d) 192
  22. 22.5.4 × 1.1 — where does the decimal point go? (a) 0.0594 (b) 59.4 (c) 5.94 (d) 0.594
  23. 23.0.36 × 4 — where does the decimal point go? (a) 0.0144 (b) 14.4 (c) 1.44 (d) 0.144
  24. 24.0.18 × 0.6 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 1.08 (d) 0.00108
  25. 25.8.9 × 0.3 — where does the decimal point go? (a) 2.67 (b) 0.267 (c) 26.7 (d) 0.0267
  26. 26.0.36 × 0.9 — where does the decimal point go? (a) 0.324 (b) 0.0324 (c) 0.00324 (d) 3.24
  27. 27.2.6 × 0.8 — where does the decimal point go? (a) 20.8 (b) 0.208 (c) 2.08 (d) 0.0208
  28. 28.0.47 × 3 — where does the decimal point go? (a) 0.0141 (b) 0.141 (c) 1.41 (d) 14.1
  29. 29.0.36 × 6 — where does the decimal point go? (a) 21.6 (b) 2.16 (c) 0.0216 (d) 0.216
  30. 30.9.5 × 39 — where does the decimal point go? (a) 37.05 (b) 370.5 (c) 3.705 (d) 3705
  31. 31.8.3 × 6 — where does the decimal point go? (a) 0.498 (b) 49.8 (c) 498 (d) 4.98
  32. 32.4.6 × 1.9 — where does the decimal point go? (a) 0.0874 (b) 8.74 (c) 0.874 (d) 87.4
  33. 33.1.3 × 24 — where does the decimal point go? (a) 3.12 (b) 31.2 (c) 0.312 (d) 312
  34. 34.1.4 × 46 — where does the decimal point go? (a) 64.4 (b) 0.644 (c) 644 (d) 6.44
  35. 35.0.71 × 8 — where does the decimal point go? (a) 0.568 (b) 5.68 (c) 56.8 (d) 0.0568
  36. 36.8.6 × 37 — where does the decimal point go? (a) 3.182 (b) 3182 (c) 318.2 (d) 31.82
  37. 37.0.16 × 2.1 — where does the decimal point go? (a) 0.00336 (b) 0.0336 (c) 3.36 (d) 0.336
  38. 38.0.71 × 12 — where does the decimal point go? (a) 8.52 (b) 0.0852 (c) 0.852 (d) 85.2
  39. 39.8.1 × 2.3 — where does the decimal point go? (a) 186.3 (b) 18.63 (c) 0.1863 (d) 1.863
  40. 40.7.9 × 49 — where does the decimal point go? (a) 3.871 (b) 387.1 (c) 3871 (d) 38.71

Answer key

  1. 192.5
  2. 6.9
  3. 4.27
  4. 3.626
  5. 0.072
  6. 64.8
  7. 6.15
  8. 37.1
  9. 0.228
  10. 28.5
  11. 47.2
  12. 1.869
  13. 21.2
  14. 16.33
  15. 92.4
  16. 5.28
  17. 0.182
  18. 71.5
  19. 9.6
  20. 2.16
  21. 19.2
  22. 5.94
  23. 1.44
  24. 0.108
  25. 2.67
  26. 0.324
  27. 2.08
  28. 1.41
  29. 2.16
  30. 370.5
  31. 49.8
  32. 8.74
  33. 31.2
  34. 64.4
  35. 5.68
  36. 318.2
  37. 0.336
  38. 8.52
  39. 18.63
  40. 387.1

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