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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 550 · 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. 1.0.52 × 43 — where does the decimal point go? (a) 223.6 (b) 2.236 (c) 0.2236 (d) 22.36
  2. 2.2.3 × 1.2 — where does the decimal point go? (a) 0.276 (b) 0.0276 (c) 27.6 (d) 2.76
  3. 3.1.9 × 3 — where does the decimal point go? (a) 5.7 (b) 0.057 (c) 0.57 (d) 57
  4. 4.5.8 × 3 — where does the decimal point go? (a) 174 (b) 0.174 (c) 17.4 (d) 1.74
  5. 5.9.7 × 36 — where does the decimal point go? (a) 349.2 (b) 34.92 (c) 3.492 (d) 3492
  6. 6.4.9 × 2 — where does the decimal point go? (a) 98 (b) 0.98 (c) 0.098 (d) 9.8
  7. 7.0.81 × 0.5 — where does the decimal point go? (a) 0.0405 (b) 0.405 (c) 0.00405 (d) 4.05
  8. 8.0.25 × 5 — where does the decimal point go? (a) 0.0125 (b) 12.5 (c) 1.25 (d) 0.125
  9. 9.0.68 × 0.3 — where does the decimal point go? (a) 0.0204 (b) 2.04 (c) 0.00204 (d) 0.204
  10. 10.6.3 × 16 — where does the decimal point go? (a) 1.008 (b) 100.8 (c) 1008 (d) 10.08
  11. 11.0.78 × 7 — where does the decimal point go? (a) 0.0546 (b) 54.6 (c) 0.546 (d) 5.46
  12. 12.0.19 × 17 — where does the decimal point go? (a) 3.23 (b) 32.3 (c) 0.323 (d) 0.0323
  13. 13.5.6 × 1.2 — where does the decimal point go? (a) 0.0672 (b) 6.72 (c) 67.2 (d) 0.672
  14. 14.0.31 × 0.4 — where does the decimal point go? (a) 0.00124 (b) 0.124 (c) 0.0124 (d) 1.24
  15. 15.3.3 × 48 — where does the decimal point go? (a) 1584 (b) 1.584 (c) 158.4 (d) 15.84
  16. 16.8.9 × 3.8 — where does the decimal point go? (a) 338.2 (b) 0.3382 (c) 33.82 (d) 3.382
  17. 17.4.3 × 0.9 — where does the decimal point go? (a) 38.7 (b) 0.387 (c) 3.87 (d) 0.0387
  18. 18.4.7 × 3 — where does the decimal point go? (a) 141 (b) 1.41 (c) 0.141 (d) 14.1
  19. 19.0.63 × 5 — where does the decimal point go? (a) 31.5 (b) 3.15 (c) 0.315 (d) 0.0315
  20. 20.2.6 × 9 — where does the decimal point go? (a) 234 (b) 0.234 (c) 23.4 (d) 2.34
  21. 21.0.45 × 1.1 — where does the decimal point go? (a) 0.00495 (b) 0.0495 (c) 0.495 (d) 4.95
  22. 22.1.3 × 0.3 — where does the decimal point go? (a) 0.039 (b) 3.9 (c) 0.0039 (d) 0.39
  23. 23.7.3 × 1.9 — where does the decimal point go? (a) 1.387 (b) 13.87 (c) 0.1387 (d) 138.7
  24. 24.9.1 × 0.5 — where does the decimal point go? (a) 45.5 (b) 4.55 (c) 0.455 (d) 0.0455
  25. 25.5.2 × 0.4 — where does the decimal point go? (a) 0.208 (b) 0.0208 (c) 20.8 (d) 2.08
  26. 26.9.8 × 46 — where does the decimal point go? (a) 4508 (b) 45.08 (c) 4.508 (d) 450.8
  27. 27.0.15 × 3 — where does the decimal point go? (a) 0.045 (b) 0.45 (c) 4.5 (d) 0.0045
  28. 28.0.91 × 0.5 — where does the decimal point go? (a) 0.455 (b) 0.0455 (c) 4.55 (d) 0.00455
  29. 29.7.6 × 0.2 — where does the decimal point go? (a) 1.52 (b) 0.152 (c) 15.2 (d) 0.0152
  30. 30.1.4 × 3 — where does the decimal point go? (a) 42 (b) 0.042 (c) 0.42 (d) 4.2
  31. 31.2.7 × 6 — where does the decimal point go? (a) 16.2 (b) 162 (c) 0.162 (d) 1.62
  32. 32.0.36 × 2 — where does the decimal point go? (a) 7.2 (b) 0.72 (c) 0.072 (d) 0.0072
  33. 33.0.28 × 0.7 — where does the decimal point go? (a) 0.0196 (b) 0.196 (c) 1.96 (d) 0.00196
  34. 34.0.21 × 0.5 — where does the decimal point go? (a) 0.0105 (b) 1.05 (c) 0.00105 (d) 0.105
  35. 35.0.73 × 41 — where does the decimal point go? (a) 2.993 (b) 29.93 (c) 0.2993 (d) 299.3
  36. 36.0.81 × 35 — where does the decimal point go? (a) 283.5 (b) 0.2835 (c) 28.35 (d) 2.835
  37. 37.9.4 × 3.1 — where does the decimal point go? (a) 2.914 (b) 291.4 (c) 0.2914 (d) 29.14
  38. 38.5.8 × 41 — where does the decimal point go? (a) 237.8 (b) 2.378 (c) 2378 (d) 23.78
  39. 39.1.9 × 0.8 — where does the decimal point go? (a) 0.152 (b) 0.0152 (c) 15.2 (d) 1.52
  40. 40.6.7 × 0.2 — where does the decimal point go? (a) 0.134 (b) 0.0134 (c) 1.34 (d) 13.4

Answer key

  1. 22.36
  2. 2.76
  3. 5.7
  4. 17.4
  5. 349.2
  6. 9.8
  7. 0.405
  8. 1.25
  9. 0.204
  10. 100.8
  11. 5.46
  12. 3.23
  13. 6.72
  14. 0.124
  15. 158.4
  16. 33.82
  17. 3.87
  18. 14.1
  19. 3.15
  20. 23.4
  21. 0.495
  22. 0.39
  23. 13.87
  24. 4.55
  25. 2.08
  26. 450.8
  27. 0.45
  28. 0.455
  29. 1.52
  30. 4.2
  31. 16.2
  32. 0.72
  33. 0.196
  34. 0.105
  35. 29.93
  36. 28.35
  37. 29.14
  38. 237.8
  39. 1.52
  40. 1.34

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