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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 203 · 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. 1.0.19 × 0.5 — where does the decimal point go? (a) 0.0095 (b) 0.95 (c) 0.00095 (d) 0.095
  2. 2.3.7 × 6 — where does the decimal point go? (a) 222 (b) 2.22 (c) 0.222 (d) 22.2
  3. 3.7.7 × 0.9 — where does the decimal point go? (a) 69.3 (b) 6.93 (c) 0.0693 (d) 0.693
  4. 4.7.8 × 0.6 — where does the decimal point go? (a) 0.468 (b) 46.8 (c) 4.68 (d) 0.0468
  5. 5.0.88 × 6 — where does the decimal point go? (a) 5.28 (b) 0.528 (c) 0.0528 (d) 52.8
  6. 6.0.86 × 2.2 — where does the decimal point go? (a) 1.892 (b) 0.01892 (c) 0.1892 (d) 18.92
  7. 7.0.99 × 6 — where does the decimal point go? (a) 0.0594 (b) 5.94 (c) 0.594 (d) 59.4
  8. 8.0.74 × 27 — where does the decimal point go? (a) 0.1998 (b) 199.8 (c) 19.98 (d) 1.998
  9. 9.2.3 × 0.9 — where does the decimal point go? (a) 0.207 (b) 20.7 (c) 0.0207 (d) 2.07
  10. 10.0.51 × 31 — where does the decimal point go? (a) 1.581 (b) 15.81 (c) 158.1 (d) 0.1581
  11. 11.2.9 × 9 — where does the decimal point go? (a) 261 (b) 2.61 (c) 0.261 (d) 26.1
  12. 12.8.7 × 4.9 — where does the decimal point go? (a) 0.4263 (b) 426.3 (c) 42.63 (d) 4.263
  13. 13.0.23 × 0.3 — where does the decimal point go? (a) 0.0069 (b) 0.069 (c) 0.69 (d) 0.00069
  14. 14.7.2 × 1.3 — where does the decimal point go? (a) 9.36 (b) 0.0936 (c) 0.936 (d) 93.6
  15. 15.4.7 × 22 — where does the decimal point go? (a) 10.34 (b) 103.4 (c) 1.034 (d) 1034
  16. 16.3.3 × 0.2 — where does the decimal point go? (a) 6.6 (b) 0.066 (c) 0.66 (d) 0.0066
  17. 17.2.2 × 0.8 — where does the decimal point go? (a) 1.76 (b) 0.0176 (c) 17.6 (d) 0.176
  18. 18.0.35 × 5 — where does the decimal point go? (a) 0.0175 (b) 0.175 (c) 17.5 (d) 1.75
  19. 19.2.3 × 8 — where does the decimal point go? (a) 184 (b) 18.4 (c) 0.184 (d) 1.84
  20. 20.0.97 × 0.7 — where does the decimal point go? (a) 0.0679 (b) 0.00679 (c) 6.79 (d) 0.679
  21. 21.1.6 × 4 — where does the decimal point go? (a) 6.4 (b) 0.64 (c) 0.064 (d) 64
  22. 22.0.88 × 2 — where does the decimal point go? (a) 0.176 (b) 17.6 (c) 1.76 (d) 0.0176
  23. 23.0.25 × 3 — where does the decimal point go? (a) 0.75 (b) 0.075 (c) 0.0075 (d) 7.5
  24. 24.6.7 × 34 — where does the decimal point go? (a) 227.8 (b) 22.78 (c) 2.278 (d) 2278
  25. 25.2.4 × 2.8 — where does the decimal point go? (a) 0.0672 (b) 67.2 (c) 6.72 (d) 0.672
  26. 26.9.4 × 4 — where does the decimal point go? (a) 37.6 (b) 3.76 (c) 0.376 (d) 376
  27. 27.8.5 × 9 — where does the decimal point go? (a) 765 (b) 0.765 (c) 7.65 (d) 76.5
  28. 28.0.28 × 44 — where does the decimal point go? (a) 12.32 (b) 123.2 (c) 0.1232 (d) 1.232
  29. 29.6.8 × 4 — where does the decimal point go? (a) 0.272 (b) 27.2 (c) 2.72 (d) 272
  30. 30.0.84 × 0.7 — where does the decimal point go? (a) 0.0588 (b) 5.88 (c) 0.00588 (d) 0.588
  31. 31.0.63 × 15 — where does the decimal point go? (a) 94.5 (b) 0.0945 (c) 0.945 (d) 9.45
  32. 32.0.41 × 4 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 16.4 (d) 0.0164
  33. 33.5.3 × 6 — where does the decimal point go? (a) 0.318 (b) 318 (c) 3.18 (d) 31.8
  34. 34.5.4 × 0.4 — where does the decimal point go? (a) 21.6 (b) 2.16 (c) 0.0216 (d) 0.216
  35. 35.3.8 × 31 — where does the decimal point go? (a) 1.178 (b) 117.8 (c) 11.78 (d) 1178
  36. 36.0.43 × 0.4 — where does the decimal point go? (a) 0.0172 (b) 0.172 (c) 1.72 (d) 0.00172
  37. 37.0.79 × 0.8 — where does the decimal point go? (a) 0.0632 (b) 6.32 (c) 0.00632 (d) 0.632
  38. 38.0.19 × 2 — where does the decimal point go? (a) 0.0038 (b) 3.8 (c) 0.38 (d) 0.038
  39. 39.9.5 × 4.9 — where does the decimal point go? (a) 4.655 (b) 465.5 (c) 46.55 (d) 0.4655
  40. 40.8.4 × 0.3 — where does the decimal point go? (a) 0.0252 (b) 0.252 (c) 2.52 (d) 25.2

Answer key

  1. 0.095
  2. 22.2
  3. 6.93
  4. 4.68
  5. 5.28
  6. 1.892
  7. 5.94
  8. 19.98
  9. 2.07
  10. 15.81
  11. 26.1
  12. 42.63
  13. 0.069
  14. 9.36
  15. 103.4
  16. 0.66
  17. 1.76
  18. 1.75
  19. 18.4
  20. 0.679
  21. 6.4
  22. 1.76
  23. 0.75
  24. 227.8
  25. 6.72
  26. 37.6
  27. 76.5
  28. 12.32
  29. 27.2
  30. 0.588
  31. 9.45
  32. 1.64
  33. 31.8
  34. 2.16
  35. 117.8
  36. 0.172
  37. 0.632
  38. 0.38
  39. 46.55
  40. 2.52

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