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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 126 · 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. 1.6.7 × 0.5 — where does the decimal point go? (a) 3.35 (b) 0.335 (c) 33.5 (d) 0.0335
  2. 2.0.53 × 0.2 — where does the decimal point go? (a) 0.106 (b) 0.0106 (c) 0.00106 (d) 1.06
  3. 3.9.7 × 25 — where does the decimal point go? (a) 2425 (b) 24.25 (c) 242.5 (d) 2.425
  4. 4.3.6 × 2.4 — where does the decimal point go? (a) 0.864 (b) 0.0864 (c) 86.4 (d) 8.64
  5. 5.4.8 × 2.4 — where does the decimal point go? (a) 1.152 (b) 115.2 (c) 11.52 (d) 0.1152
  6. 6.3.3 × 2.6 — where does the decimal point go? (a) 0.0858 (b) 85.8 (c) 8.58 (d) 0.858
  7. 7.1.2 × 3 — where does the decimal point go? (a) 36 (b) 0.36 (c) 3.6 (d) 0.036
  8. 8.3.1 × 39 — where does the decimal point go? (a) 1209 (b) 12.09 (c) 1.209 (d) 120.9
  9. 9.0.76 × 0.4 — where does the decimal point go? (a) 0.304 (b) 0.0304 (c) 0.00304 (d) 3.04
  10. 10.0.65 × 4.9 — where does the decimal point go? (a) 3.185 (b) 31.85 (c) 0.03185 (d) 0.3185
  11. 11.6.9 × 14 — where does the decimal point go? (a) 0.966 (b) 96.6 (c) 9.66 (d) 966
  12. 12.0.54 × 26 — where does the decimal point go? (a) 0.1404 (b) 140.4 (c) 14.04 (d) 1.404
  13. 13.0.86 × 38 — where does the decimal point go? (a) 3.268 (b) 0.3268 (c) 326.8 (d) 32.68
  14. 14.0.48 × 7 — where does the decimal point go? (a) 3.36 (b) 0.0336 (c) 0.336 (d) 33.6
  15. 15.6.8 × 3 — where does the decimal point go? (a) 204 (b) 0.204 (c) 20.4 (d) 2.04
  16. 16.0.16 × 37 — where does the decimal point go? (a) 59.2 (b) 0.0592 (c) 5.92 (d) 0.592
  17. 17.4.2 × 14 — where does the decimal point go? (a) 588 (b) 0.588 (c) 5.88 (d) 58.8
  18. 18.0.47 × 4.7 — where does the decimal point go? (a) 22.09 (b) 0.02209 (c) 2.209 (d) 0.2209
  19. 19.0.34 × 39 — where does the decimal point go? (a) 13.26 (b) 1.326 (c) 132.6 (d) 0.1326
  20. 20.4.8 × 0.2 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 9.6 (d) 0.96
  21. 21.0.36 × 0.3 — where does the decimal point go? (a) 0.00108 (b) 1.08 (c) 0.108 (d) 0.0108
  22. 22.4.3 × 0.3 — where does the decimal point go? (a) 1.29 (b) 0.0129 (c) 0.129 (d) 12.9
  23. 23.6.5 × 5 — where does the decimal point go? (a) 3.25 (b) 0.325 (c) 32.5 (d) 325
  24. 24.0.86 × 33 — where does the decimal point go? (a) 283.8 (b) 2.838 (c) 28.38 (d) 0.2838
  25. 25.4.1 × 0.6 — where does the decimal point go? (a) 2.46 (b) 0.246 (c) 0.0246 (d) 24.6
  26. 26.0.87 × 12 — where does the decimal point go? (a) 1.044 (b) 0.1044 (c) 104.4 (d) 10.44
  27. 27.0.91 × 1.4 — where does the decimal point go? (a) 0.1274 (b) 0.01274 (c) 1.274 (d) 12.74
  28. 28.0.89 × 1.5 — where does the decimal point go? (a) 1.335 (b) 0.01335 (c) 0.1335 (d) 13.35
  29. 29.1.8 × 17 — where does the decimal point go? (a) 30.6 (b) 0.306 (c) 3.06 (d) 306
  30. 30.1.7 × 2.7 — where does the decimal point go? (a) 45.9 (b) 4.59 (c) 0.459 (d) 0.0459
  31. 31.0.38 × 0.9 — where does the decimal point go? (a) 3.42 (b) 0.0342 (c) 0.342 (d) 0.00342
  32. 32.0.27 × 0.2 — where does the decimal point go? (a) 0.054 (b) 0.54 (c) 0.0054 (d) 0.00054
  33. 33.0.33 × 4 — where does the decimal point go? (a) 0.0132 (b) 1.32 (c) 13.2 (d) 0.132
  34. 34.7.5 × 37 — where does the decimal point go? (a) 277.5 (b) 27.75 (c) 2775 (d) 2.775
  35. 35.3.7 × 0.8 — where does the decimal point go? (a) 0.296 (b) 2.96 (c) 29.6 (d) 0.0296
  36. 36.2.1 × 1.5 — where does the decimal point go? (a) 0.0315 (b) 0.315 (c) 3.15 (d) 31.5
  37. 37.3.9 × 0.7 — where does the decimal point go? (a) 27.3 (b) 2.73 (c) 0.273 (d) 0.0273
  38. 38.0.94 × 11 — where does the decimal point go? (a) 1.034 (b) 10.34 (c) 0.1034 (d) 103.4
  39. 39.2.1 × 1.6 — where does the decimal point go? (a) 33.6 (b) 3.36 (c) 0.336 (d) 0.0336
  40. 40.9.4 × 0.2 — where does the decimal point go? (a) 1.88 (b) 0.0188 (c) 0.188 (d) 18.8

Answer key

  1. 3.35
  2. 0.106
  3. 242.5
  4. 8.64
  5. 11.52
  6. 8.58
  7. 3.6
  8. 120.9
  9. 0.304
  10. 3.185
  11. 96.6
  12. 14.04
  13. 32.68
  14. 3.36
  15. 20.4
  16. 5.92
  17. 58.8
  18. 2.209
  19. 13.26
  20. 0.96
  21. 0.108
  22. 1.29
  23. 32.5
  24. 28.38
  25. 2.46
  26. 10.44
  27. 1.274
  28. 1.335
  29. 30.6
  30. 4.59
  31. 0.342
  32. 0.054
  33. 1.32
  34. 277.5
  35. 2.96
  36. 3.15
  37. 2.73
  38. 10.34
  39. 3.36
  40. 1.88

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