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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 396 · 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. 1.3.2 × 0.2 — where does the decimal point go? (a) 0.64 (b) 6.4 (c) 0.0064 (d) 0.064
  2. 2.7.3 × 32 — where does the decimal point go? (a) 233.6 (b) 2.336 (c) 23.36 (d) 2336
  3. 3.0.28 × 0.9 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 0.00252 (d) 0.0252
  4. 4.2.9 × 9 — where does the decimal point go? (a) 2.61 (b) 261 (c) 26.1 (d) 0.261
  5. 5.3.3 × 17 — where does the decimal point go? (a) 5.61 (b) 56.1 (c) 561 (d) 0.561
  6. 6.2.2 × 0.2 — where does the decimal point go? (a) 0.044 (b) 0.44 (c) 0.0044 (d) 4.4
  7. 7.3.8 × 34 — where does the decimal point go? (a) 1.292 (b) 12.92 (c) 129.2 (d) 1292
  8. 8.0.91 × 5 — where does the decimal point go? (a) 0.455 (b) 45.5 (c) 0.0455 (d) 4.55
  9. 9.3.8 × 28 — where does the decimal point go? (a) 10.64 (b) 1064 (c) 106.4 (d) 1.064
  10. 10.0.97 × 7 — where does the decimal point go? (a) 67.9 (b) 0.0679 (c) 0.679 (d) 6.79
  11. 11.0.98 × 0.8 — where does the decimal point go? (a) 7.84 (b) 0.00784 (c) 0.784 (d) 0.0784
  12. 12.2.8 × 2.3 — where does the decimal point go? (a) 6.44 (b) 0.644 (c) 64.4 (d) 0.0644
  13. 13.0.68 × 1.1 — where does the decimal point go? (a) 7.48 (b) 0.00748 (c) 0.748 (d) 0.0748
  14. 14.0.72 × 29 — where does the decimal point go? (a) 20.88 (b) 2.088 (c) 0.2088 (d) 208.8
  15. 15.5.3 × 47 — where does the decimal point go? (a) 249.1 (b) 24.91 (c) 2.491 (d) 2491
  16. 16.0.67 × 4.4 — where does the decimal point go? (a) 0.02948 (b) 0.2948 (c) 2.948 (d) 29.48
  17. 17.0.25 × 35 — where does the decimal point go? (a) 0.875 (b) 87.5 (c) 8.75 (d) 0.0875
  18. 18.0.68 × 1.2 — where does the decimal point go? (a) 0.816 (b) 0.00816 (c) 0.0816 (d) 8.16
  19. 19.0.26 × 1.9 — where does the decimal point go? (a) 0.0494 (b) 4.94 (c) 0.00494 (d) 0.494
  20. 20.0.24 × 48 — where does the decimal point go? (a) 1.152 (b) 115.2 (c) 0.1152 (d) 11.52
  21. 21.8.7 × 7 — where does the decimal point go? (a) 60.9 (b) 0.609 (c) 609 (d) 6.09
  22. 22.5.7 × 9 — where does the decimal point go? (a) 0.513 (b) 513 (c) 51.3 (d) 5.13
  23. 23.0.39 × 35 — where does the decimal point go? (a) 1.365 (b) 0.1365 (c) 13.65 (d) 136.5
  24. 24.4.5 × 0.3 — where does the decimal point go? (a) 13.5 (b) 0.0135 (c) 1.35 (d) 0.135
  25. 25.8.5 × 0.3 — where does the decimal point go? (a) 2.55 (b) 25.5 (c) 0.255 (d) 0.0255
  26. 26.0.73 × 0.4 — where does the decimal point go? (a) 0.292 (b) 0.00292 (c) 0.0292 (d) 2.92
  27. 27.0.28 × 2 — where does the decimal point go? (a) 0.56 (b) 0.0056 (c) 0.056 (d) 5.6
  28. 28.0.33 × 15 — where does the decimal point go? (a) 0.495 (b) 49.5 (c) 0.0495 (d) 4.95
  29. 29.0.62 × 2.4 — where does the decimal point go? (a) 14.88 (b) 0.1488 (c) 0.01488 (d) 1.488
  30. 30.6.7 × 0.8 — where does the decimal point go? (a) 0.536 (b) 0.0536 (c) 5.36 (d) 53.6
  31. 31.0.13 × 1.4 — where does the decimal point go? (a) 0.182 (b) 0.00182 (c) 1.82 (d) 0.0182
  32. 32.0.21 × 5 — where does the decimal point go? (a) 0.105 (b) 1.05 (c) 10.5 (d) 0.0105
  33. 33.5.1 × 3 — where does the decimal point go? (a) 1.53 (b) 0.153 (c) 153 (d) 15.3
  34. 34.0.89 × 0.2 — where does the decimal point go? (a) 0.0178 (b) 0.178 (c) 1.78 (d) 0.00178
  35. 35.0.73 × 3 — where does the decimal point go? (a) 0.0219 (b) 0.219 (c) 2.19 (d) 21.9
  36. 36.3.1 × 13 — where does the decimal point go? (a) 4.03 (b) 403 (c) 40.3 (d) 0.403
  37. 37.8.9 × 6 — where does the decimal point go? (a) 5.34 (b) 0.534 (c) 53.4 (d) 534
  38. 38.6.9 × 9 — where does the decimal point go? (a) 0.621 (b) 6.21 (c) 621 (d) 62.1
  39. 39.0.89 × 2 — where does the decimal point go? (a) 1.78 (b) 0.178 (c) 0.0178 (d) 17.8
  40. 40.2.1 × 7 — where does the decimal point go? (a) 14.7 (b) 0.147 (c) 147 (d) 1.47

Answer key

  1. 0.64
  2. 233.6
  3. 0.252
  4. 26.1
  5. 56.1
  6. 0.44
  7. 129.2
  8. 4.55
  9. 106.4
  10. 6.79
  11. 0.784
  12. 6.44
  13. 0.748
  14. 20.88
  15. 249.1
  16. 2.948
  17. 8.75
  18. 0.816
  19. 0.494
  20. 11.52
  21. 60.9
  22. 51.3
  23. 13.65
  24. 1.35
  25. 2.55
  26. 0.292
  27. 0.56
  28. 4.95
  29. 1.488
  30. 5.36
  31. 0.182
  32. 1.05
  33. 15.3
  34. 0.178
  35. 2.19
  36. 40.3
  37. 53.4
  38. 62.1
  39. 1.78
  40. 14.7

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