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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 636 · 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. 1.4.7 × 28 — where does the decimal point go? (a) 131.6 (b) 13.16 (c) 1316 (d) 1.316
  2. 2.3.9 × 9 — where does the decimal point go? (a) 3.51 (b) 351 (c) 35.1 (d) 0.351
  3. 3.0.33 × 2 — where does the decimal point go? (a) 0.66 (b) 6.6 (c) 0.066 (d) 0.0066
  4. 4.1.4 × 16 — where does the decimal point go? (a) 0.224 (b) 2.24 (c) 22.4 (d) 224
  5. 5.2.1 × 2.8 — where does the decimal point go? (a) 58.8 (b) 0.0588 (c) 5.88 (d) 0.588
  6. 6.0.74 × 3 — where does the decimal point go? (a) 2.22 (b) 0.222 (c) 0.0222 (d) 22.2
  7. 7.0.53 × 38 — where does the decimal point go? (a) 2.014 (b) 201.4 (c) 20.14 (d) 0.2014
  8. 8.0.74 × 0.3 — where does the decimal point go? (a) 0.0222 (b) 2.22 (c) 0.00222 (d) 0.222
  9. 9.2.6 × 44 — where does the decimal point go? (a) 1144 (b) 11.44 (c) 1.144 (d) 114.4
  10. 10.2.8 × 2.3 — where does the decimal point go? (a) 64.4 (b) 6.44 (c) 0.644 (d) 0.0644
  11. 11.6.7 × 1.5 — where does the decimal point go? (a) 100.5 (b) 1.005 (c) 0.1005 (d) 10.05
  12. 12.3.7 × 5 — where does the decimal point go? (a) 185 (b) 1.85 (c) 0.185 (d) 18.5
  13. 13.2.4 × 8 — where does the decimal point go? (a) 192 (b) 1.92 (c) 0.192 (d) 19.2
  14. 14.0.28 × 0.8 — where does the decimal point go? (a) 2.24 (b) 0.224 (c) 0.00224 (d) 0.0224
  15. 15.0.69 × 2.4 — where does the decimal point go? (a) 1.656 (b) 0.1656 (c) 0.01656 (d) 16.56
  16. 16.0.57 × 35 — where does the decimal point go? (a) 1.995 (b) 0.1995 (c) 199.5 (d) 19.95
  17. 17.0.23 × 0.9 — where does the decimal point go? (a) 0.00207 (b) 0.207 (c) 2.07 (d) 0.0207
  18. 18.3.2 × 2 — where does the decimal point go? (a) 64 (b) 0.064 (c) 0.64 (d) 6.4
  19. 19.2.1 × 9 — where does the decimal point go? (a) 0.189 (b) 1.89 (c) 189 (d) 18.9
  20. 20.8.2 × 4 — where does the decimal point go? (a) 3.28 (b) 0.328 (c) 328 (d) 32.8
  21. 21.0.71 × 5 — where does the decimal point go? (a) 3.55 (b) 0.355 (c) 0.0355 (d) 35.5
  22. 22.0.83 × 6 — where does the decimal point go? (a) 0.0498 (b) 0.498 (c) 49.8 (d) 4.98
  23. 23.2.7 × 0.5 — where does the decimal point go? (a) 1.35 (b) 0.135 (c) 13.5 (d) 0.0135
  24. 24.9.6 × 6 — where does the decimal point go? (a) 0.576 (b) 57.6 (c) 576 (d) 5.76
  25. 25.0.46 × 4.7 — where does the decimal point go? (a) 2.162 (b) 0.02162 (c) 21.62 (d) 0.2162
  26. 26.0.66 × 0.6 — where does the decimal point go? (a) 3.96 (b) 0.0396 (c) 0.00396 (d) 0.396
  27. 27.2.5 × 2.9 — where does the decimal point go? (a) 7.25 (b) 0.0725 (c) 72.5 (d) 0.725
  28. 28.8.7 × 3.4 — where does the decimal point go? (a) 2.958 (b) 0.2958 (c) 29.58 (d) 295.8
  29. 29.9.5 × 1.5 — where does the decimal point go? (a) 1.425 (b) 14.25 (c) 0.1425 (d) 142.5
  30. 30.7.2 × 39 — where does the decimal point go? (a) 2.808 (b) 28.08 (c) 2808 (d) 280.8
  31. 31.2.3 × 0.2 — where does the decimal point go? (a) 0.0046 (b) 0.46 (c) 0.046 (d) 4.6
  32. 32.1.6 × 7 — where does the decimal point go? (a) 1.12 (b) 112 (c) 0.112 (d) 11.2
  33. 33.0.78 × 4.4 — where does the decimal point go? (a) 34.32 (b) 0.3432 (c) 3.432 (d) 0.03432
  34. 34.0.23 × 3.9 — where does the decimal point go? (a) 0.897 (b) 8.97 (c) 0.00897 (d) 0.0897
  35. 35.9.1 × 3.9 — where does the decimal point go? (a) 35.49 (b) 3.549 (c) 0.3549 (d) 354.9
  36. 36.0.49 × 0.3 — where does the decimal point go? (a) 0.147 (b) 0.00147 (c) 0.0147 (d) 1.47
  37. 37.9.9 × 0.9 — where does the decimal point go? (a) 0.0891 (b) 0.891 (c) 89.1 (d) 8.91
  38. 38.4.7 × 0.5 — where does the decimal point go? (a) 2.35 (b) 0.0235 (c) 0.235 (d) 23.5
  39. 39.5.8 × 1.2 — where does the decimal point go? (a) 0.696 (b) 0.0696 (c) 6.96 (d) 69.6
  40. 40.0.21 × 15 — where does the decimal point go? (a) 0.0315 (b) 0.315 (c) 31.5 (d) 3.15

Answer key

  1. 131.6
  2. 35.1
  3. 0.66
  4. 22.4
  5. 5.88
  6. 2.22
  7. 20.14
  8. 0.222
  9. 114.4
  10. 6.44
  11. 10.05
  12. 18.5
  13. 19.2
  14. 0.224
  15. 1.656
  16. 19.95
  17. 0.207
  18. 6.4
  19. 18.9
  20. 32.8
  21. 3.55
  22. 4.98
  23. 1.35
  24. 57.6
  25. 2.162
  26. 0.396
  27. 7.25
  28. 29.58
  29. 14.25
  30. 280.8
  31. 0.46
  32. 11.2
  33. 3.432
  34. 0.897
  35. 35.49
  36. 0.147
  37. 8.91
  38. 2.35
  39. 6.96
  40. 3.15

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