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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 236 · 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. 1.0.34 × 0.6 — where does the decimal point go? (a) 0.204 (b) 0.00204 (c) 2.04 (d) 0.0204
  2. 2.8.6 × 6 — where does the decimal point go? (a) 51.6 (b) 5.16 (c) 0.516 (d) 516
  3. 3.4.6 × 4 — where does the decimal point go? (a) 184 (b) 0.184 (c) 18.4 (d) 1.84
  4. 4.4.8 × 2.2 — where does the decimal point go? (a) 10.56 (b) 105.6 (c) 0.1056 (d) 1.056
  5. 5.2.1 × 36 — where does the decimal point go? (a) 0.756 (b) 756 (c) 75.6 (d) 7.56
  6. 6.2.8 × 47 — where does the decimal point go? (a) 131.6 (b) 13.16 (c) 1316 (d) 1.316
  7. 7.6.8 × 2.8 — where does the decimal point go? (a) 19.04 (b) 190.4 (c) 1.904 (d) 0.1904
  8. 8.0.62 × 4.9 — where does the decimal point go? (a) 0.3038 (b) 30.38 (c) 3.038 (d) 0.03038
  9. 9.2.4 × 4.4 — where does the decimal point go? (a) 10.56 (b) 1.056 (c) 0.1056 (d) 105.6
  10. 10.2.7 × 6 — where does the decimal point go? (a) 162 (b) 0.162 (c) 1.62 (d) 16.2
  11. 11.5.5 × 3.9 — where does the decimal point go? (a) 0.2145 (b) 21.45 (c) 214.5 (d) 2.145
  12. 12.9.9 × 9 — where does the decimal point go? (a) 8.91 (b) 0.891 (c) 891 (d) 89.1
  13. 13.0.47 × 3 — where does the decimal point go? (a) 0.141 (b) 14.1 (c) 1.41 (d) 0.0141
  14. 14.0.23 × 1.9 — where does the decimal point go? (a) 4.37 (b) 0.437 (c) 0.00437 (d) 0.0437
  15. 15.0.82 × 8 — where does the decimal point go? (a) 0.0656 (b) 0.656 (c) 6.56 (d) 65.6
  16. 16.7.4 × 0.3 — where does the decimal point go? (a) 22.2 (b) 0.222 (c) 0.0222 (d) 2.22
  17. 17.0.67 × 0.3 — where does the decimal point go? (a) 0.00201 (b) 0.0201 (c) 2.01 (d) 0.201
  18. 18.1.7 × 6 — where does the decimal point go? (a) 102 (b) 1.02 (c) 10.2 (d) 0.102
  19. 19.0.71 × 0.3 — where does the decimal point go? (a) 0.213 (b) 0.00213 (c) 2.13 (d) 0.0213
  20. 20.0.51 × 2.9 — where does the decimal point go? (a) 0.1479 (b) 0.01479 (c) 1.479 (d) 14.79
  21. 21.2.9 × 0.6 — where does the decimal point go? (a) 0.174 (b) 17.4 (c) 0.0174 (d) 1.74
  22. 22.1.8 × 7 — where does the decimal point go? (a) 12.6 (b) 0.126 (c) 1.26 (d) 126
  23. 23.0.69 × 2 — where does the decimal point go? (a) 0.138 (b) 13.8 (c) 1.38 (d) 0.0138
  24. 24.5.1 × 4.7 — where does the decimal point go? (a) 23.97 (b) 0.2397 (c) 239.7 (d) 2.397
  25. 25.0.54 × 0.4 — where does the decimal point go? (a) 0.0216 (b) 0.216 (c) 0.00216 (d) 2.16
  26. 26.7.4 × 4 — where does the decimal point go? (a) 2.96 (b) 296 (c) 0.296 (d) 29.6
  27. 27.7.4 × 0.8 — where does the decimal point go? (a) 59.2 (b) 5.92 (c) 0.0592 (d) 0.592
  28. 28.8.3 × 0.8 — where does the decimal point go? (a) 6.64 (b) 0.0664 (c) 0.664 (d) 66.4
  29. 29.0.63 × 2 — where does the decimal point go? (a) 0.0126 (b) 0.126 (c) 1.26 (d) 12.6
  30. 30.0.42 × 0.8 — where does the decimal point go? (a) 0.00336 (b) 0.336 (c) 3.36 (d) 0.0336
  31. 31.5.9 × 22 — where does the decimal point go? (a) 1298 (b) 12.98 (c) 1.298 (d) 129.8
  32. 32.6.6 × 0.3 — where does the decimal point go? (a) 0.198 (b) 19.8 (c) 1.98 (d) 0.0198
  33. 33.0.84 × 2.8 — where does the decimal point go? (a) 0.02352 (b) 2.352 (c) 23.52 (d) 0.2352
  34. 34.0.23 × 16 — where does the decimal point go? (a) 0.0368 (b) 3.68 (c) 0.368 (d) 36.8
  35. 35.9.6 × 2 — where does the decimal point go? (a) 192 (b) 0.192 (c) 19.2 (d) 1.92
  36. 36.3.9 × 0.8 — where does the decimal point go? (a) 31.2 (b) 0.0312 (c) 0.312 (d) 3.12
  37. 37.0.53 × 26 — where does the decimal point go? (a) 0.1378 (b) 13.78 (c) 137.8 (d) 1.378
  38. 38.3.1 × 0.7 — where does the decimal point go? (a) 21.7 (b) 2.17 (c) 0.0217 (d) 0.217
  39. 39.4.9 × 6 — where does the decimal point go? (a) 0.294 (b) 294 (c) 2.94 (d) 29.4
  40. 40.0.43 × 1.1 — where does the decimal point go? (a) 0.0473 (b) 4.73 (c) 0.00473 (d) 0.473

Answer key

  1. 0.204
  2. 51.6
  3. 18.4
  4. 10.56
  5. 75.6
  6. 131.6
  7. 19.04
  8. 3.038
  9. 10.56
  10. 16.2
  11. 21.45
  12. 89.1
  13. 1.41
  14. 0.437
  15. 6.56
  16. 2.22
  17. 0.201
  18. 10.2
  19. 0.213
  20. 1.479
  21. 1.74
  22. 12.6
  23. 1.38
  24. 23.97
  25. 0.216
  26. 29.6
  27. 5.92
  28. 6.64
  29. 1.26
  30. 0.336
  31. 129.8
  32. 1.98
  33. 2.352
  34. 3.68
  35. 19.2
  36. 3.12
  37. 13.78
  38. 2.17
  39. 29.4
  40. 0.473

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