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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 609 · 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 × 7 — where does the decimal point go? (a) 0.364 (b) 0.0364 (c) 3.64 (d) 36.4
  2. 2.0.24 × 0.7 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 0.00168 (d) 1.68
  3. 3.2.6 × 0.4 — where does the decimal point go? (a) 0.104 (b) 10.4 (c) 0.0104 (d) 1.04
  4. 4.3.5 × 0.3 — where does the decimal point go? (a) 1.05 (b) 0.0105 (c) 10.5 (d) 0.105
  5. 5.3.2 × 2.2 — where does the decimal point go? (a) 0.0704 (b) 0.704 (c) 70.4 (d) 7.04
  6. 6.0.81 × 1.3 — where does the decimal point go? (a) 1.053 (b) 0.1053 (c) 10.53 (d) 0.01053
  7. 7.2.9 × 2.5 — where does the decimal point go? (a) 0.0725 (b) 0.725 (c) 72.5 (d) 7.25
  8. 8.0.61 × 27 — where does the decimal point go? (a) 0.1647 (b) 1.647 (c) 164.7 (d) 16.47
  9. 9.0.72 × 0.3 — where does the decimal point go? (a) 2.16 (b) 0.0216 (c) 0.216 (d) 0.00216
  10. 10.0.44 × 9 — where does the decimal point go? (a) 0.0396 (b) 0.396 (c) 3.96 (d) 39.6
  11. 11.0.22 × 29 — where does the decimal point go? (a) 6.38 (b) 63.8 (c) 0.638 (d) 0.0638
  12. 12.1.9 × 23 — where does the decimal point go? (a) 0.437 (b) 4.37 (c) 43.7 (d) 437
  13. 13.0.29 × 0.9 — where does the decimal point go? (a) 0.261 (b) 0.00261 (c) 2.61 (d) 0.0261
  14. 14.7.3 × 2.1 — where does the decimal point go? (a) 0.1533 (b) 15.33 (c) 1.533 (d) 153.3
  15. 15.7.1 × 0.3 — where does the decimal point go? (a) 0.0213 (b) 21.3 (c) 0.213 (d) 2.13
  16. 16.2.7 × 15 — where does the decimal point go? (a) 4.05 (b) 40.5 (c) 405 (d) 0.405
  17. 17.0.34 × 0.8 — where does the decimal point go? (a) 0.0272 (b) 2.72 (c) 0.00272 (d) 0.272
  18. 18.6.4 × 4.3 — where does the decimal point go? (a) 2.752 (b) 0.2752 (c) 275.2 (d) 27.52
  19. 19.5.4 × 24 — where does the decimal point go? (a) 129.6 (b) 1.296 (c) 12.96 (d) 1296
  20. 20.0.19 × 0.3 — where does the decimal point go? (a) 0.57 (b) 0.00057 (c) 0.0057 (d) 0.057
  21. 21.2.3 × 1.1 — where does the decimal point go? (a) 0.253 (b) 0.0253 (c) 2.53 (d) 25.3
  22. 22.3.7 × 1.9 — where does the decimal point go? (a) 7.03 (b) 0.0703 (c) 0.703 (d) 70.3
  23. 23.0.23 × 43 — where does the decimal point go? (a) 0.0989 (b) 9.89 (c) 98.9 (d) 0.989
  24. 24.4.2 × 1.7 — where does the decimal point go? (a) 0.714 (b) 0.0714 (c) 71.4 (d) 7.14
  25. 25.7.7 × 7 — where does the decimal point go? (a) 0.539 (b) 5.39 (c) 53.9 (d) 539
  26. 26.7.7 × 0.4 — where does the decimal point go? (a) 0.308 (b) 0.0308 (c) 30.8 (d) 3.08
  27. 27.0.28 × 44 — where does the decimal point go? (a) 12.32 (b) 123.2 (c) 1.232 (d) 0.1232
  28. 28.7.2 × 0.2 — where does the decimal point go? (a) 0.0144 (b) 0.144 (c) 14.4 (d) 1.44
  29. 29.1.4 × 0.7 — where does the decimal point go? (a) 0.98 (b) 0.0098 (c) 0.098 (d) 9.8
  30. 30.2.1 × 1.8 — where does the decimal point go? (a) 3.78 (b) 0.378 (c) 0.0378 (d) 37.8
  31. 31.0.49 × 8 — where does the decimal point go? (a) 0.392 (b) 0.0392 (c) 39.2 (d) 3.92
  32. 32.1.6 × 2 — where does the decimal point go? (a) 32 (b) 0.032 (c) 0.32 (d) 3.2
  33. 33.9.5 × 3 — where does the decimal point go? (a) 2.85 (b) 0.285 (c) 28.5 (d) 285
  34. 34.2.6 × 0.8 — where does the decimal point go? (a) 2.08 (b) 0.0208 (c) 20.8 (d) 0.208
  35. 35.0.75 × 9 — where does the decimal point go? (a) 67.5 (b) 0.0675 (c) 0.675 (d) 6.75
  36. 36.4.2 × 7 — where does the decimal point go? (a) 29.4 (b) 0.294 (c) 294 (d) 2.94
  37. 37.0.29 × 24 — where does the decimal point go? (a) 0.696 (b) 6.96 (c) 0.0696 (d) 69.6
  38. 38.0.73 × 24 — where does the decimal point go? (a) 175.2 (b) 0.1752 (c) 1.752 (d) 17.52
  39. 39.0.23 × 12 — where does the decimal point go? (a) 2.76 (b) 0.276 (c) 27.6 (d) 0.0276
  40. 40.3.8 × 0.3 — where does the decimal point go? (a) 11.4 (b) 1.14 (c) 0.114 (d) 0.0114

Answer key

  1. 3.64
  2. 0.168
  3. 1.04
  4. 1.05
  5. 7.04
  6. 1.053
  7. 7.25
  8. 16.47
  9. 0.216
  10. 3.96
  11. 6.38
  12. 43.7
  13. 0.261
  14. 15.33
  15. 2.13
  16. 40.5
  17. 0.272
  18. 27.52
  19. 129.6
  20. 0.057
  21. 2.53
  22. 7.03
  23. 9.89
  24. 7.14
  25. 53.9
  26. 3.08
  27. 12.32
  28. 1.44
  29. 0.98
  30. 3.78
  31. 3.92
  32. 3.2
  33. 28.5
  34. 2.08
  35. 6.75
  36. 29.4
  37. 6.96
  38. 17.52
  39. 2.76
  40. 1.14

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