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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 565 · 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. 1.0.98 × 0.3 — where does the decimal point go? (a) 0.0294 (b) 2.94 (c) 0.00294 (d) 0.294
  2. 2.0.24 × 7 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 16.8 (d) 1.68
  3. 3.0.34 × 8 — where does the decimal point go? (a) 2.72 (b) 27.2 (c) 0.272 (d) 0.0272
  4. 4.0.51 × 8 — where does the decimal point go? (a) 0.408 (b) 0.0408 (c) 4.08 (d) 40.8
  5. 5.9.2 × 1.3 — where does the decimal point go? (a) 11.96 (b) 0.1196 (c) 119.6 (d) 1.196
  6. 6.0.69 × 1.3 — where does the decimal point go? (a) 0.00897 (b) 0.0897 (c) 0.897 (d) 8.97
  7. 7.8.6 × 2 — where does the decimal point go? (a) 1.72 (b) 0.172 (c) 172 (d) 17.2
  8. 8.2.9 × 0.5 — where does the decimal point go? (a) 0.0145 (b) 1.45 (c) 0.145 (d) 14.5
  9. 9.2.8 × 3.2 — where does the decimal point go? (a) 89.6 (b) 8.96 (c) 0.0896 (d) 0.896
  10. 10.0.65 × 3.3 — where does the decimal point go? (a) 21.45 (b) 0.02145 (c) 2.145 (d) 0.2145
  11. 11.5.2 × 2.8 — where does the decimal point go? (a) 14.56 (b) 0.1456 (c) 145.6 (d) 1.456
  12. 12.0.53 × 0.5 — where does the decimal point go? (a) 2.65 (b) 0.00265 (c) 0.0265 (d) 0.265
  13. 13.3.1 × 4.5 — where does the decimal point go? (a) 13.95 (b) 0.1395 (c) 139.5 (d) 1.395
  14. 14.5.7 × 0.3 — where does the decimal point go? (a) 0.171 (b) 0.0171 (c) 1.71 (d) 17.1
  15. 15.0.24 × 4 — where does the decimal point go? (a) 0.0096 (b) 0.096 (c) 9.6 (d) 0.96
  16. 16.0.51 × 0.3 — where does the decimal point go? (a) 0.0153 (b) 1.53 (c) 0.00153 (d) 0.153
  17. 17.8.4 × 1.1 — where does the decimal point go? (a) 92.4 (b) 9.24 (c) 0.0924 (d) 0.924
  18. 18.0.36 × 33 — where does the decimal point go? (a) 1.188 (b) 0.1188 (c) 11.88 (d) 118.8
  19. 19.0.33 × 7 — where does the decimal point go? (a) 2.31 (b) 23.1 (c) 0.231 (d) 0.0231
  20. 20.5.6 × 6 — where does the decimal point go? (a) 0.336 (b) 336 (c) 33.6 (d) 3.36
  21. 21.2.9 × 4.1 — where does the decimal point go? (a) 118.9 (b) 0.1189 (c) 1.189 (d) 11.89
  22. 22.5.3 × 5 — where does the decimal point go? (a) 0.265 (b) 26.5 (c) 265 (d) 2.65
  23. 23.9.8 × 0.9 — where does the decimal point go? (a) 0.0882 (b) 0.882 (c) 88.2 (d) 8.82
  24. 24.7.4 × 0.3 — where does the decimal point go? (a) 22.2 (b) 0.0222 (c) 0.222 (d) 2.22
  25. 25.3.3 × 1.7 — where does the decimal point go? (a) 0.561 (b) 56.1 (c) 5.61 (d) 0.0561
  26. 26.0.92 × 19 — where does the decimal point go? (a) 1.748 (b) 0.1748 (c) 17.48 (d) 174.8
  27. 27.0.24 × 8 — where does the decimal point go? (a) 0.0192 (b) 19.2 (c) 0.192 (d) 1.92
  28. 28.6.9 × 0.4 — where does the decimal point go? (a) 27.6 (b) 2.76 (c) 0.0276 (d) 0.276
  29. 29.5.6 × 19 — where does the decimal point go? (a) 1.064 (b) 10.64 (c) 106.4 (d) 1064
  30. 30.2.1 × 34 — where does the decimal point go? (a) 0.714 (b) 714 (c) 7.14 (d) 71.4
  31. 31.0.96 × 2.8 — where does the decimal point go? (a) 2.688 (b) 26.88 (c) 0.02688 (d) 0.2688
  32. 32.0.92 × 4 — where does the decimal point go? (a) 3.68 (b) 36.8 (c) 0.0368 (d) 0.368
  33. 33.7.8 × 36 — where does the decimal point go? (a) 280.8 (b) 2.808 (c) 2808 (d) 28.08
  34. 34.1.8 × 11 — where does the decimal point go? (a) 0.198 (b) 1.98 (c) 19.8 (d) 198
  35. 35.0.91 × 0.9 — where does the decimal point go? (a) 0.00819 (b) 0.819 (c) 8.19 (d) 0.0819
  36. 36.4.9 × 3.7 — where does the decimal point go? (a) 1.813 (b) 18.13 (c) 181.3 (d) 0.1813
  37. 37.0.61 × 3.9 — where does the decimal point go? (a) 0.2379 (b) 0.02379 (c) 2.379 (d) 23.79
  38. 38.2.8 × 0.2 — where does the decimal point go? (a) 0.56 (b) 0.0056 (c) 0.056 (d) 5.6
  39. 39.0.73 × 12 — where does the decimal point go? (a) 0.876 (b) 8.76 (c) 0.0876 (d) 87.6
  40. 40.8.9 × 0.6 — where does the decimal point go? (a) 0.534 (b) 0.0534 (c) 5.34 (d) 53.4

Answer key

  1. 0.294
  2. 1.68
  3. 2.72
  4. 4.08
  5. 11.96
  6. 0.897
  7. 17.2
  8. 1.45
  9. 8.96
  10. 2.145
  11. 14.56
  12. 0.265
  13. 13.95
  14. 1.71
  15. 0.96
  16. 0.153
  17. 9.24
  18. 11.88
  19. 2.31
  20. 33.6
  21. 11.89
  22. 26.5
  23. 8.82
  24. 2.22
  25. 5.61
  26. 17.48
  27. 1.92
  28. 2.76
  29. 106.4
  30. 71.4
  31. 2.688
  32. 3.68
  33. 280.8
  34. 19.8
  35. 0.819
  36. 18.13
  37. 2.379
  38. 0.56
  39. 8.76
  40. 5.34

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