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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 414 · 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. 1.5.7 × 0.5 — where does the decimal point go? (a) 0.285 (b) 28.5 (c) 0.0285 (d) 2.85
  2. 2.0.14 × 4 — where does the decimal point go? (a) 0.056 (b) 5.6 (c) 0.56 (d) 0.0056
  3. 3.0.52 × 1.1 — where does the decimal point go? (a) 0.00572 (b) 0.572 (c) 0.0572 (d) 5.72
  4. 4.0.77 × 1.6 — where does the decimal point go? (a) 1.232 (b) 0.01232 (c) 12.32 (d) 0.1232
  5. 5.0.98 × 0.3 — where does the decimal point go? (a) 0.294 (b) 2.94 (c) 0.00294 (d) 0.0294
  6. 6.2.2 × 0.4 — where does the decimal point go? (a) 0.88 (b) 0.088 (c) 8.8 (d) 0.0088
  7. 7.0.12 × 2.8 — where does the decimal point go? (a) 0.0336 (b) 0.00336 (c) 3.36 (d) 0.336
  8. 8.0.12 × 21 — where does the decimal point go? (a) 0.252 (b) 0.0252 (c) 25.2 (d) 2.52
  9. 9.3.7 × 3 — where does the decimal point go? (a) 1.11 (b) 11.1 (c) 0.111 (d) 111
  10. 10.0.58 × 4 — where does the decimal point go? (a) 2.32 (b) 0.0232 (c) 23.2 (d) 0.232
  11. 11.1.7 × 0.7 — where does the decimal point go? (a) 11.9 (b) 0.0119 (c) 1.19 (d) 0.119
  12. 12.3.4 × 28 — where does the decimal point go? (a) 952 (b) 95.2 (c) 0.952 (d) 9.52
  13. 13.0.15 × 4.7 — where does the decimal point go? (a) 0.00705 (b) 7.05 (c) 0.0705 (d) 0.705
  14. 14.0.54 × 0.3 — where does the decimal point go? (a) 0.0162 (b) 1.62 (c) 0.00162 (d) 0.162
  15. 15.0.94 × 0.3 — where does the decimal point go? (a) 2.82 (b) 0.00282 (c) 0.0282 (d) 0.282
  16. 16.9.9 × 14 — where does the decimal point go? (a) 13.86 (b) 1.386 (c) 138.6 (d) 1386
  17. 17.6.1 × 0.2 — where does the decimal point go? (a) 12.2 (b) 0.122 (c) 1.22 (d) 0.0122
  18. 18.0.15 × 0.9 — where does the decimal point go? (a) 0.0135 (b) 1.35 (c) 0.135 (d) 0.00135
  19. 19.0.34 × 0.3 — where does the decimal point go? (a) 0.00102 (b) 1.02 (c) 0.0102 (d) 0.102
  20. 20.1.9 × 3 — where does the decimal point go? (a) 0.57 (b) 0.057 (c) 57 (d) 5.7
  21. 21.5.2 × 7 — where does the decimal point go? (a) 3.64 (b) 364 (c) 0.364 (d) 36.4
  22. 22.2.7 × 29 — where does the decimal point go? (a) 783 (b) 0.783 (c) 78.3 (d) 7.83
  23. 23.0.86 × 2 — where does the decimal point go? (a) 0.0172 (b) 1.72 (c) 17.2 (d) 0.172
  24. 24.8.2 × 0.2 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 16.4 (d) 0.0164
  25. 25.0.69 × 0.4 — where does the decimal point go? (a) 2.76 (b) 0.0276 (c) 0.00276 (d) 0.276
  26. 26.1.2 × 0.4 — where does the decimal point go? (a) 0.048 (b) 0.48 (c) 4.8 (d) 0.0048
  27. 27.0.82 × 0.9 — where does the decimal point go? (a) 7.38 (b) 0.00738 (c) 0.738 (d) 0.0738
  28. 28.0.61 × 16 — where does the decimal point go? (a) 0.0976 (b) 97.6 (c) 0.976 (d) 9.76
  29. 29.4.3 × 3.5 — where does the decimal point go? (a) 1.505 (b) 15.05 (c) 150.5 (d) 0.1505
  30. 30.1.2 × 4 — where does the decimal point go? (a) 4.8 (b) 0.48 (c) 0.048 (d) 48
  31. 31.0.75 × 0.3 — where does the decimal point go? (a) 0.00225 (b) 0.225 (c) 2.25 (d) 0.0225
  32. 32.7.9 × 0.2 — where does the decimal point go? (a) 1.58 (b) 15.8 (c) 0.158 (d) 0.0158
  33. 33.6.4 × 12 — where does the decimal point go? (a) 7.68 (b) 76.8 (c) 768 (d) 0.768
  34. 34.0.91 × 0.6 — where does the decimal point go? (a) 0.0546 (b) 0.546 (c) 5.46 (d) 0.00546
  35. 35.0.57 × 0.2 — where does the decimal point go? (a) 0.0114 (b) 0.114 (c) 1.14 (d) 0.00114
  36. 36.8.3 × 36 — where does the decimal point go? (a) 298.8 (b) 2988 (c) 2.988 (d) 29.88
  37. 37.0.31 × 0.5 — where does the decimal point go? (a) 1.55 (b) 0.0155 (c) 0.00155 (d) 0.155
  38. 38.0.34 × 4.9 — where does the decimal point go? (a) 0.1666 (b) 1.666 (c) 0.01666 (d) 16.66
  39. 39.8.3 × 0.3 — where does the decimal point go? (a) 24.9 (b) 0.0249 (c) 0.249 (d) 2.49
  40. 40.0.96 × 32 — where does the decimal point go? (a) 0.3072 (b) 30.72 (c) 3.072 (d) 307.2

Answer key

  1. 2.85
  2. 0.56
  3. 0.572
  4. 1.232
  5. 0.294
  6. 0.88
  7. 0.336
  8. 2.52
  9. 11.1
  10. 2.32
  11. 1.19
  12. 95.2
  13. 0.705
  14. 0.162
  15. 0.282
  16. 138.6
  17. 1.22
  18. 0.135
  19. 0.102
  20. 5.7
  21. 36.4
  22. 78.3
  23. 1.72
  24. 1.64
  25. 0.276
  26. 0.48
  27. 0.738
  28. 9.76
  29. 15.05
  30. 4.8
  31. 0.225
  32. 1.58
  33. 76.8
  34. 0.546
  35. 0.114
  36. 298.8
  37. 0.155
  38. 1.666
  39. 2.49
  40. 30.72

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