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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 539 · 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. 1.8.4 × 6 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 5.04 (d) 504
  2. 2.7.9 × 31 — where does the decimal point go? (a) 2.449 (b) 244.9 (c) 2449 (d) 24.49
  3. 3.0.57 × 11 — where does the decimal point go? (a) 0.0627 (b) 6.27 (c) 62.7 (d) 0.627
  4. 4.0.47 × 1.5 — where does the decimal point go? (a) 0.00705 (b) 7.05 (c) 0.705 (d) 0.0705
  5. 5.9.2 × 2.6 — where does the decimal point go? (a) 2.392 (b) 0.2392 (c) 23.92 (d) 239.2
  6. 6.0.36 × 14 — where does the decimal point go? (a) 50.4 (b) 0.504 (c) 5.04 (d) 0.0504
  7. 7.9.3 × 0.2 — where does the decimal point go? (a) 0.186 (b) 0.0186 (c) 1.86 (d) 18.6
  8. 8.4.2 × 2 — where does the decimal point go? (a) 0.84 (b) 8.4 (c) 0.084 (d) 84
  9. 9.0.74 × 0.9 — where does the decimal point go? (a) 6.66 (b) 0.666 (c) 0.00666 (d) 0.0666
  10. 10.0.54 × 32 — where does the decimal point go? (a) 1.728 (b) 17.28 (c) 0.1728 (d) 172.8
  11. 11.7.5 × 37 — where does the decimal point go? (a) 2.775 (b) 277.5 (c) 27.75 (d) 2775
  12. 12.3.7 × 0.5 — where does the decimal point go? (a) 0.0185 (b) 0.185 (c) 18.5 (d) 1.85
  13. 13.7.6 × 0.6 — where does the decimal point go? (a) 4.56 (b) 45.6 (c) 0.456 (d) 0.0456
  14. 14.0.66 × 2 — where does the decimal point go? (a) 0.0132 (b) 13.2 (c) 1.32 (d) 0.132
  15. 15.4.3 × 0.7 — where does the decimal point go? (a) 3.01 (b) 0.301 (c) 30.1 (d) 0.0301
  16. 16.1.4 × 3 — where does the decimal point go? (a) 42 (b) 0.042 (c) 4.2 (d) 0.42
  17. 17.1.4 × 7 — where does the decimal point go? (a) 9.8 (b) 0.98 (c) 0.098 (d) 98
  18. 18.0.57 × 5 — where does the decimal point go? (a) 28.5 (b) 0.0285 (c) 0.285 (d) 2.85
  19. 19.0.56 × 4.8 — where does the decimal point go? (a) 0.02688 (b) 2.688 (c) 0.2688 (d) 26.88
  20. 20.0.72 × 4 — where does the decimal point go? (a) 28.8 (b) 0.0288 (c) 2.88 (d) 0.288
  21. 21.4.3 × 3.9 — where does the decimal point go? (a) 1.677 (b) 167.7 (c) 16.77 (d) 0.1677
  22. 22.7.6 × 4 — where does the decimal point go? (a) 304 (b) 30.4 (c) 0.304 (d) 3.04
  23. 23.4.6 × 2.4 — where does the decimal point go? (a) 0.1104 (b) 110.4 (c) 1.104 (d) 11.04
  24. 24.9.1 × 22 — where does the decimal point go? (a) 2.002 (b) 2002 (c) 20.02 (d) 200.2
  25. 25.2.9 × 3 — where does the decimal point go? (a) 87 (b) 8.7 (c) 0.087 (d) 0.87
  26. 26.8.4 × 0.2 — where does the decimal point go? (a) 0.168 (b) 16.8 (c) 0.0168 (d) 1.68
  27. 27.2.7 × 17 — where does the decimal point go? (a) 4.59 (b) 45.9 (c) 459 (d) 0.459
  28. 28.0.62 × 0.8 — where does the decimal point go? (a) 0.496 (b) 0.0496 (c) 4.96 (d) 0.00496
  29. 29.0.82 × 2 — where does the decimal point go? (a) 16.4 (b) 1.64 (c) 0.0164 (d) 0.164
  30. 30.0.51 × 0.3 — where does the decimal point go? (a) 0.00153 (b) 1.53 (c) 0.0153 (d) 0.153
  31. 31.3.8 × 34 — where does the decimal point go? (a) 1.292 (b) 12.92 (c) 1292 (d) 129.2
  32. 32.5.1 × 4.4 — where does the decimal point go? (a) 0.2244 (b) 224.4 (c) 22.44 (d) 2.244
  33. 33.0.61 × 49 — where does the decimal point go? (a) 298.9 (b) 2.989 (c) 29.89 (d) 0.2989
  34. 34.8.8 × 0.7 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 6.16 (d) 61.6
  35. 35.5.4 × 2.7 — where does the decimal point go? (a) 14.58 (b) 1.458 (c) 0.1458 (d) 145.8
  36. 36.0.54 × 4 — where does the decimal point go? (a) 21.6 (b) 0.216 (c) 0.0216 (d) 2.16
  37. 37.3.7 × 6 — where does the decimal point go? (a) 22.2 (b) 222 (c) 0.222 (d) 2.22
  38. 38.0.39 × 5 — where does the decimal point go? (a) 0.0195 (b) 1.95 (c) 19.5 (d) 0.195
  39. 39.0.48 × 9 — where does the decimal point go? (a) 0.0432 (b) 4.32 (c) 0.432 (d) 43.2
  40. 40.0.25 × 7 — where does the decimal point go? (a) 0.0175 (b) 1.75 (c) 17.5 (d) 0.175

Answer key

  1. 50.4
  2. 244.9
  3. 6.27
  4. 0.705
  5. 23.92
  6. 5.04
  7. 1.86
  8. 8.4
  9. 0.666
  10. 17.28
  11. 277.5
  12. 1.85
  13. 4.56
  14. 1.32
  15. 3.01
  16. 4.2
  17. 9.8
  18. 2.85
  19. 2.688
  20. 2.88
  21. 16.77
  22. 30.4
  23. 11.04
  24. 200.2
  25. 8.7
  26. 1.68
  27. 45.9
  28. 0.496
  29. 1.64
  30. 0.153
  31. 129.2
  32. 22.44
  33. 29.89
  34. 6.16
  35. 14.58
  36. 2.16
  37. 22.2
  38. 1.95
  39. 4.32
  40. 1.75

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