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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 338 · 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. 1.0.49 × 5 — where does the decimal point go? (a) 0.245 (b) 24.5 (c) 0.0245 (d) 2.45
  2. 2.4.6 × 2.6 — where does the decimal point go? (a) 11.96 (b) 0.1196 (c) 119.6 (d) 1.196
  3. 3.3.2 × 37 — where does the decimal point go? (a) 1.184 (b) 11.84 (c) 1184 (d) 118.4
  4. 4.0.13 × 2.1 — where does the decimal point go? (a) 0.0273 (b) 0.00273 (c) 0.273 (d) 2.73
  5. 5.3.2 × 0.7 — where does the decimal point go? (a) 0.224 (b) 0.0224 (c) 22.4 (d) 2.24
  6. 6.0.98 × 4 — where does the decimal point go? (a) 3.92 (b) 39.2 (c) 0.392 (d) 0.0392
  7. 7.6.8 × 14 — where does the decimal point go? (a) 0.952 (b) 952 (c) 9.52 (d) 95.2
  8. 8.6.9 × 1.3 — where does the decimal point go? (a) 8.97 (b) 0.897 (c) 0.0897 (d) 89.7
  9. 9.0.68 × 3.7 — where does the decimal point go? (a) 0.02516 (b) 0.2516 (c) 2.516 (d) 25.16
  10. 10.7.1 × 25 — where does the decimal point go? (a) 17.75 (b) 1.775 (c) 177.5 (d) 1775
  11. 11.7.3 × 7 — where does the decimal point go? (a) 5.11 (b) 0.511 (c) 511 (d) 51.1
  12. 12.0.23 × 2.8 — where does the decimal point go? (a) 0.00644 (b) 0.644 (c) 0.0644 (d) 6.44
  13. 13.4.2 × 28 — where does the decimal point go? (a) 1176 (b) 1.176 (c) 11.76 (d) 117.6
  14. 14.4.1 × 0.8 — where does the decimal point go? (a) 0.328 (b) 3.28 (c) 32.8 (d) 0.0328
  15. 15.2.9 × 4 — where does the decimal point go? (a) 11.6 (b) 116 (c) 1.16 (d) 0.116
  16. 16.8.6 × 9 — where does the decimal point go? (a) 77.4 (b) 774 (c) 7.74 (d) 0.774
  17. 17.7.8 × 3 — where does the decimal point go? (a) 0.234 (b) 2.34 (c) 23.4 (d) 234
  18. 18.0.24 × 0.9 — where does the decimal point go? (a) 0.216 (b) 0.0216 (c) 2.16 (d) 0.00216
  19. 19.4.7 × 0.2 — where does the decimal point go? (a) 0.0094 (b) 0.94 (c) 9.4 (d) 0.094
  20. 20.7.2 × 0.3 — where does the decimal point go? (a) 21.6 (b) 0.0216 (c) 2.16 (d) 0.216
  21. 21.8.6 × 0.3 — where does the decimal point go? (a) 25.8 (b) 0.0258 (c) 2.58 (d) 0.258
  22. 22.2.7 × 37 — where does the decimal point go? (a) 0.999 (b) 9.99 (c) 99.9 (d) 999
  23. 23.0.53 × 3 — where does the decimal point go? (a) 0.159 (b) 0.0159 (c) 15.9 (d) 1.59
  24. 24.2.5 × 43 — where does the decimal point go? (a) 1.075 (b) 1075 (c) 10.75 (d) 107.5
  25. 25.3.1 × 3.8 — where does the decimal point go? (a) 1.178 (b) 117.8 (c) 0.1178 (d) 11.78
  26. 26.0.73 × 8 — where does the decimal point go? (a) 0.584 (b) 5.84 (c) 0.0584 (d) 58.4
  27. 27.0.18 × 9 — where does the decimal point go? (a) 0.162 (b) 0.0162 (c) 16.2 (d) 1.62
  28. 28.0.59 × 19 — where does the decimal point go? (a) 1.121 (b) 0.1121 (c) 112.1 (d) 11.21
  29. 29.3.4 × 1.6 — where does the decimal point go? (a) 0.0544 (b) 5.44 (c) 0.544 (d) 54.4
  30. 30.4.5 × 7 — where does the decimal point go? (a) 315 (b) 0.315 (c) 3.15 (d) 31.5
  31. 31.4.4 × 21 — where does the decimal point go? (a) 0.924 (b) 9.24 (c) 92.4 (d) 924
  32. 32.0.48 × 0.9 — where does the decimal point go? (a) 4.32 (b) 0.00432 (c) 0.0432 (d) 0.432
  33. 33.1.3 × 9 — where does the decimal point go? (a) 0.117 (b) 117 (c) 11.7 (d) 1.17
  34. 34.4.9 × 9 — where does the decimal point go? (a) 44.1 (b) 0.441 (c) 4.41 (d) 441
  35. 35.7.9 × 23 — where does the decimal point go? (a) 1.817 (b) 18.17 (c) 1817 (d) 181.7
  36. 36.0.49 × 29 — where does the decimal point go? (a) 0.1421 (b) 14.21 (c) 1.421 (d) 142.1
  37. 37.8.9 × 4.6 — where does the decimal point go? (a) 4.094 (b) 0.4094 (c) 40.94 (d) 409.4
  38. 38.0.24 × 4 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 0.96 (d) 9.6
  39. 39.7.7 × 1.1 — where does the decimal point go? (a) 84.7 (b) 0.847 (c) 8.47 (d) 0.0847
  40. 40.5.6 × 2.7 — where does the decimal point go? (a) 1.512 (b) 151.2 (c) 0.1512 (d) 15.12

Answer key

  1. 2.45
  2. 11.96
  3. 118.4
  4. 0.273
  5. 2.24
  6. 3.92
  7. 95.2
  8. 8.97
  9. 2.516
  10. 177.5
  11. 51.1
  12. 0.644
  13. 117.6
  14. 3.28
  15. 11.6
  16. 77.4
  17. 23.4
  18. 0.216
  19. 0.94
  20. 2.16
  21. 2.58
  22. 99.9
  23. 1.59
  24. 107.5
  25. 11.78
  26. 5.84
  27. 1.62
  28. 11.21
  29. 5.44
  30. 31.5
  31. 92.4
  32. 0.432
  33. 11.7
  34. 44.1
  35. 181.7
  36. 14.21
  37. 40.94
  38. 0.96
  39. 8.47
  40. 15.12

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