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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 552 · 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. 1.0.16 × 17 — where does the decimal point go? (a) 0.0272 (b) 0.272 (c) 2.72 (d) 27.2
  2. 2.9.1 × 4.4 — where does the decimal point go? (a) 400.4 (b) 4.004 (c) 0.4004 (d) 40.04
  3. 3.0.94 × 3 — where does the decimal point go? (a) 0.0282 (b) 2.82 (c) 0.282 (d) 28.2
  4. 4.1.9 × 5 — where does the decimal point go? (a) 9.5 (b) 0.095 (c) 0.95 (d) 95
  5. 5.0.97 × 2.2 — where does the decimal point go? (a) 0.2134 (b) 0.02134 (c) 21.34 (d) 2.134
  6. 6.2.9 × 0.4 — where does the decimal point go? (a) 1.16 (b) 0.116 (c) 0.0116 (d) 11.6
  7. 7.0.87 × 4.4 — where does the decimal point go? (a) 3.828 (b) 0.3828 (c) 38.28 (d) 0.03828
  8. 8.0.92 × 0.2 — where does the decimal point go? (a) 0.184 (b) 0.0184 (c) 0.00184 (d) 1.84
  9. 9.0.88 × 3 — where does the decimal point go? (a) 0.264 (b) 26.4 (c) 2.64 (d) 0.0264
  10. 10.2.4 × 39 — where does the decimal point go? (a) 0.936 (b) 9.36 (c) 93.6 (d) 936
  11. 11.7.6 × 13 — where does the decimal point go? (a) 988 (b) 9.88 (c) 0.988 (d) 98.8
  12. 12.0.55 × 17 — where does the decimal point go? (a) 93.5 (b) 0.0935 (c) 9.35 (d) 0.935
  13. 13.0.79 × 2 — where does the decimal point go? (a) 15.8 (b) 0.158 (c) 1.58 (d) 0.0158
  14. 14.0.18 × 0.9 — where does the decimal point go? (a) 0.162 (b) 0.00162 (c) 1.62 (d) 0.0162
  15. 15.4.7 × 4 — where does the decimal point go? (a) 18.8 (b) 1.88 (c) 188 (d) 0.188
  16. 16.0.93 × 36 — where does the decimal point go? (a) 33.48 (b) 334.8 (c) 0.3348 (d) 3.348
  17. 17.2.1 × 16 — where does the decimal point go? (a) 33.6 (b) 3.36 (c) 336 (d) 0.336
  18. 18.3.8 × 39 — where does the decimal point go? (a) 1482 (b) 14.82 (c) 1.482 (d) 148.2
  19. 19.0.34 × 9 — where does the decimal point go? (a) 3.06 (b) 0.306 (c) 30.6 (d) 0.0306
  20. 20.3.9 × 7 — where does the decimal point go? (a) 273 (b) 2.73 (c) 27.3 (d) 0.273
  21. 21.0.28 × 4.7 — where does the decimal point go? (a) 0.01316 (b) 13.16 (c) 0.1316 (d) 1.316
  22. 22.0.88 × 0.7 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 0.00616 (d) 6.16
  23. 23.0.19 × 0.9 — where does the decimal point go? (a) 0.00171 (b) 0.171 (c) 1.71 (d) 0.0171
  24. 24.0.79 × 0.8 — where does the decimal point go? (a) 0.632 (b) 0.00632 (c) 6.32 (d) 0.0632
  25. 25.0.39 × 3 — where does the decimal point go? (a) 11.7 (b) 1.17 (c) 0.0117 (d) 0.117
  26. 26.7.2 × 16 — where does the decimal point go? (a) 115.2 (b) 1152 (c) 1.152 (d) 11.52
  27. 27.5.4 × 8 — where does the decimal point go? (a) 432 (b) 4.32 (c) 43.2 (d) 0.432
  28. 28.5.1 × 4 — where does the decimal point go? (a) 20.4 (b) 0.204 (c) 204 (d) 2.04
  29. 29.8.9 × 2.9 — where does the decimal point go? (a) 25.81 (b) 2.581 (c) 0.2581 (d) 258.1
  30. 30.0.61 × 0.6 — where does the decimal point go? (a) 0.00366 (b) 3.66 (c) 0.0366 (d) 0.366
  31. 31.0.94 × 0.2 — where does the decimal point go? (a) 0.188 (b) 0.00188 (c) 0.0188 (d) 1.88
  32. 32.0.13 × 35 — where does the decimal point go? (a) 0.0455 (b) 45.5 (c) 0.455 (d) 4.55
  33. 33.0.36 × 0.3 — where does the decimal point go? (a) 0.0108 (b) 0.00108 (c) 0.108 (d) 1.08
  34. 34.2.1 × 2 — where does the decimal point go? (a) 0.042 (b) 0.42 (c) 4.2 (d) 42
  35. 35.6.9 × 3 — where does the decimal point go? (a) 0.207 (b) 2.07 (c) 20.7 (d) 207
  36. 36.8.8 × 2 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 17.6 (d) 176
  37. 37.0.71 × 34 — where does the decimal point go? (a) 24.14 (b) 0.2414 (c) 2.414 (d) 241.4
  38. 38.6.2 × 0.4 — where does the decimal point go? (a) 2.48 (b) 24.8 (c) 0.248 (d) 0.0248
  39. 39.9.8 × 0.2 — where does the decimal point go? (a) 0.196 (b) 0.0196 (c) 1.96 (d) 19.6
  40. 40.5.1 × 0.5 — where does the decimal point go? (a) 2.55 (b) 0.255 (c) 25.5 (d) 0.0255

Answer key

  1. 2.72
  2. 40.04
  3. 2.82
  4. 9.5
  5. 2.134
  6. 1.16
  7. 3.828
  8. 0.184
  9. 2.64
  10. 93.6
  11. 98.8
  12. 9.35
  13. 1.58
  14. 0.162
  15. 18.8
  16. 33.48
  17. 33.6
  18. 148.2
  19. 3.06
  20. 27.3
  21. 1.316
  22. 0.616
  23. 0.171
  24. 0.632
  25. 1.17
  26. 115.2
  27. 43.2
  28. 20.4
  29. 25.81
  30. 0.366
  31. 0.188
  32. 4.55
  33. 0.108
  34. 4.2
  35. 20.7
  36. 17.6
  37. 24.14
  38. 2.48
  39. 1.96
  40. 2.55

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