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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 708 · 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. 1.8.5 × 7 — where does the decimal point go? (a) 59.5 (b) 0.595 (c) 5.95 (d) 595
  2. 2.5.8 × 0.6 — where does the decimal point go? (a) 0.0348 (b) 34.8 (c) 0.348 (d) 3.48
  3. 3.0.69 × 0.2 — where does the decimal point go? (a) 1.38 (b) 0.0138 (c) 0.138 (d) 0.00138
  4. 4.7.8 × 0.3 — where does the decimal point go? (a) 0.0234 (b) 0.234 (c) 2.34 (d) 23.4
  5. 5.0.26 × 28 — where does the decimal point go? (a) 72.8 (b) 0.728 (c) 0.0728 (d) 7.28
  6. 6.8.4 × 0.2 — where does the decimal point go? (a) 0.168 (b) 0.0168 (c) 1.68 (d) 16.8
  7. 7.0.48 × 0.3 — where does the decimal point go? (a) 1.44 (b) 0.144 (c) 0.00144 (d) 0.0144
  8. 8.0.72 × 2.2 — where does the decimal point go? (a) 1.584 (b) 0.01584 (c) 15.84 (d) 0.1584
  9. 9.1.8 × 9 — where does the decimal point go? (a) 1.62 (b) 16.2 (c) 0.162 (d) 162
  10. 10.2.3 × 2.7 — where does the decimal point go? (a) 0.621 (b) 0.0621 (c) 6.21 (d) 62.1
  11. 11.0.26 × 0.8 — where does the decimal point go? (a) 0.00208 (b) 0.0208 (c) 0.208 (d) 2.08
  12. 12.0.72 × 33 — where does the decimal point go? (a) 0.2376 (b) 23.76 (c) 2.376 (d) 237.6
  13. 13.6.8 × 2.8 — where does the decimal point go? (a) 190.4 (b) 19.04 (c) 1.904 (d) 0.1904
  14. 14.0.33 × 0.2 — where does the decimal point go? (a) 0.066 (b) 0.00066 (c) 0.66 (d) 0.0066
  15. 15.0.97 × 0.8 — where does the decimal point go? (a) 0.0776 (b) 0.776 (c) 0.00776 (d) 7.76
  16. 16.4.9 × 0.6 — where does the decimal point go? (a) 2.94 (b) 0.0294 (c) 0.294 (d) 29.4
  17. 17.0.47 × 2 — where does the decimal point go? (a) 0.094 (b) 0.0094 (c) 0.94 (d) 9.4
  18. 18.0.62 × 0.2 — where does the decimal point go? (a) 0.124 (b) 0.00124 (c) 0.0124 (d) 1.24
  19. 19.6.7 × 2 — where does the decimal point go? (a) 13.4 (b) 134 (c) 0.134 (d) 1.34
  20. 20.0.87 × 2.2 — where does the decimal point go? (a) 0.1914 (b) 19.14 (c) 0.01914 (d) 1.914
  21. 21.0.63 × 0.8 — where does the decimal point go? (a) 0.0504 (b) 0.504 (c) 0.00504 (d) 5.04
  22. 22.9.2 × 4.4 — where does the decimal point go? (a) 40.48 (b) 404.8 (c) 0.4048 (d) 4.048
  23. 23.0.95 × 0.9 — where does the decimal point go? (a) 0.0855 (b) 0.855 (c) 8.55 (d) 0.00855
  24. 24.0.99 × 33 — where does the decimal point go? (a) 32.67 (b) 0.3267 (c) 326.7 (d) 3.267
  25. 25.7.3 × 9 — where does the decimal point go? (a) 657 (b) 6.57 (c) 65.7 (d) 0.657
  26. 26.1.3 × 11 — where does the decimal point go? (a) 143 (b) 1.43 (c) 0.143 (d) 14.3
  27. 27.0.83 × 0.2 — where does the decimal point go? (a) 0.166 (b) 0.0166 (c) 1.66 (d) 0.00166
  28. 28.6.9 × 2 — where does the decimal point go? (a) 138 (b) 0.138 (c) 1.38 (d) 13.8
  29. 29.0.23 × 9 — where does the decimal point go? (a) 20.7 (b) 0.0207 (c) 2.07 (d) 0.207
  30. 30.4.9 × 1.3 — where does the decimal point go? (a) 0.0637 (b) 63.7 (c) 0.637 (d) 6.37
  31. 31.7.1 × 0.5 — where does the decimal point go? (a) 0.355 (b) 35.5 (c) 0.0355 (d) 3.55
  32. 32.5.2 × 4.1 — where does the decimal point go? (a) 21.32 (b) 2.132 (c) 0.2132 (d) 213.2
  33. 33.1.6 × 31 — where does the decimal point go? (a) 496 (b) 4.96 (c) 49.6 (d) 0.496
  34. 34.0.61 × 0.6 — where does the decimal point go? (a) 0.0366 (b) 0.00366 (c) 0.366 (d) 3.66
  35. 35.8.9 × 24 — where does the decimal point go? (a) 2.136 (b) 21.36 (c) 213.6 (d) 2136
  36. 36.2.4 × 3.6 — where does the decimal point go? (a) 0.864 (b) 0.0864 (c) 8.64 (d) 86.4
  37. 37.3.6 × 2.4 — where does the decimal point go? (a) 8.64 (b) 86.4 (c) 0.0864 (d) 0.864
  38. 38.0.17 × 14 — where does the decimal point go? (a) 2.38 (b) 0.0238 (c) 23.8 (d) 0.238
  39. 39.3.4 × 6 — where does the decimal point go? (a) 204 (b) 20.4 (c) 0.204 (d) 2.04
  40. 40.0.12 × 41 — where does the decimal point go? (a) 0.0492 (b) 0.492 (c) 4.92 (d) 49.2

Answer key

  1. 59.5
  2. 3.48
  3. 0.138
  4. 2.34
  5. 7.28
  6. 1.68
  7. 0.144
  8. 1.584
  9. 16.2
  10. 6.21
  11. 0.208
  12. 23.76
  13. 19.04
  14. 0.066
  15. 0.776
  16. 2.94
  17. 0.94
  18. 0.124
  19. 13.4
  20. 1.914
  21. 0.504
  22. 40.48
  23. 0.855
  24. 32.67
  25. 65.7
  26. 14.3
  27. 0.166
  28. 13.8
  29. 2.07
  30. 6.37
  31. 3.55
  32. 21.32
  33. 49.6
  34. 0.366
  35. 213.6
  36. 8.64
  37. 8.64
  38. 2.38
  39. 20.4
  40. 4.92

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