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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 449 · 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. 1.0.53 × 4.2 — where does the decimal point go? (a) 0.02226 (b) 0.2226 (c) 2.226 (d) 22.26
  2. 2.0.77 × 0.9 — where does the decimal point go? (a) 0.0693 (b) 0.693 (c) 0.00693 (d) 6.93
  3. 3.0.89 × 9 — where does the decimal point go? (a) 0.0801 (b) 80.1 (c) 0.801 (d) 8.01
  4. 4.1.7 × 0.3 — where does the decimal point go? (a) 0.051 (b) 5.1 (c) 0.51 (d) 0.0051
  5. 5.9.3 × 0.3 — where does the decimal point go? (a) 0.0279 (b) 2.79 (c) 0.279 (d) 27.9
  6. 6.8.9 × 0.3 — where does the decimal point go? (a) 0.267 (b) 0.0267 (c) 2.67 (d) 26.7
  7. 7.2.1 × 4.5 — where does the decimal point go? (a) 9.45 (b) 94.5 (c) 0.0945 (d) 0.945
  8. 8.6.1 × 0.8 — where does the decimal point go? (a) 48.8 (b) 0.488 (c) 0.0488 (d) 4.88
  9. 9.9.4 × 4.3 — where does the decimal point go? (a) 4.042 (b) 404.2 (c) 40.42 (d) 0.4042
  10. 10.0.21 × 0.3 — where does the decimal point go? (a) 0.063 (b) 0.00063 (c) 0.63 (d) 0.0063
  11. 11.6.4 × 0.6 — where does the decimal point go? (a) 0.384 (b) 0.0384 (c) 3.84 (d) 38.4
  12. 12.7.2 × 23 — where does the decimal point go? (a) 16.56 (b) 165.6 (c) 1.656 (d) 1656
  13. 13.0.32 × 49 — where does the decimal point go? (a) 15.68 (b) 156.8 (c) 1.568 (d) 0.1568
  14. 14.0.22 × 3.3 — where does the decimal point go? (a) 7.26 (b) 0.726 (c) 0.00726 (d) 0.0726
  15. 15.0.86 × 0.8 — where does the decimal point go? (a) 0.0688 (b) 0.688 (c) 0.00688 (d) 6.88
  16. 16.0.46 × 2.8 — where does the decimal point go? (a) 1.288 (b) 0.1288 (c) 0.01288 (d) 12.88
  17. 17.4.1 × 0.4 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 16.4 (d) 0.0164
  18. 18.0.32 × 0.8 — where does the decimal point go? (a) 0.256 (b) 0.0256 (c) 0.00256 (d) 2.56
  19. 19.8.1 × 8 — where does the decimal point go? (a) 0.648 (b) 64.8 (c) 6.48 (d) 648
  20. 20.0.51 × 0.6 — where does the decimal point go? (a) 0.306 (b) 0.0306 (c) 0.00306 (d) 3.06
  21. 21.0.76 × 21 — where does the decimal point go? (a) 0.1596 (b) 1.596 (c) 159.6 (d) 15.96
  22. 22.0.24 × 23 — where does the decimal point go? (a) 0.0552 (b) 55.2 (c) 0.552 (d) 5.52
  23. 23.7.7 × 0.3 — where does the decimal point go? (a) 0.231 (b) 2.31 (c) 23.1 (d) 0.0231
  24. 24.9.2 × 0.6 — where does the decimal point go? (a) 5.52 (b) 0.0552 (c) 0.552 (d) 55.2
  25. 25.6.9 × 4.3 — where does the decimal point go? (a) 29.67 (b) 2.967 (c) 0.2967 (d) 296.7
  26. 26.0.76 × 9 — where does the decimal point go? (a) 6.84 (b) 0.684 (c) 68.4 (d) 0.0684
  27. 27.5.4 × 8 — where does the decimal point go? (a) 43.2 (b) 0.432 (c) 4.32 (d) 432
  28. 28.1.7 × 9 — where does the decimal point go? (a) 153 (b) 0.153 (c) 1.53 (d) 15.3
  29. 29.0.31 × 0.5 — where does the decimal point go? (a) 0.0155 (b) 1.55 (c) 0.155 (d) 0.00155
  30. 30.0.27 × 2.1 — where does the decimal point go? (a) 5.67 (b) 0.00567 (c) 0.0567 (d) 0.567
  31. 31.3.6 × 32 — where does the decimal point go? (a) 115.2 (b) 1.152 (c) 1152 (d) 11.52
  32. 32.0.86 × 9 — where does the decimal point go? (a) 0.774 (b) 7.74 (c) 77.4 (d) 0.0774
  33. 33.0.35 × 3 — where does the decimal point go? (a) 1.05 (b) 0.0105 (c) 10.5 (d) 0.105
  34. 34.0.94 × 43 — where does the decimal point go? (a) 0.4042 (b) 404.2 (c) 4.042 (d) 40.42
  35. 35.4.3 × 9 — where does the decimal point go? (a) 387 (b) 3.87 (c) 0.387 (d) 38.7
  36. 36.1.3 × 0.2 — where does the decimal point go? (a) 0.0026 (b) 0.026 (c) 2.6 (d) 0.26
  37. 37.0.96 × 19 — where does the decimal point go? (a) 0.1824 (b) 1.824 (c) 182.4 (d) 18.24
  38. 38.0.49 × 0.7 — where does the decimal point go? (a) 0.343 (b) 0.0343 (c) 3.43 (d) 0.00343
  39. 39.0.78 × 4.6 — where does the decimal point go? (a) 0.3588 (b) 0.03588 (c) 35.88 (d) 3.588
  40. 40.0.44 × 39 — where does the decimal point go? (a) 17.16 (b) 0.1716 (c) 171.6 (d) 1.716

Answer key

  1. 2.226
  2. 0.693
  3. 8.01
  4. 0.51
  5. 2.79
  6. 2.67
  7. 9.45
  8. 4.88
  9. 40.42
  10. 0.063
  11. 3.84
  12. 165.6
  13. 15.68
  14. 0.726
  15. 0.688
  16. 1.288
  17. 1.64
  18. 0.256
  19. 64.8
  20. 0.306
  21. 15.96
  22. 5.52
  23. 2.31
  24. 5.52
  25. 29.67
  26. 6.84
  27. 43.2
  28. 15.3
  29. 0.155
  30. 0.567
  31. 115.2
  32. 7.74
  33. 1.05
  34. 40.42
  35. 38.7
  36. 0.26
  37. 18.24
  38. 0.343
  39. 3.588
  40. 17.16

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