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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 607 · 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. 1.5.2 × 0.3 — where does the decimal point go? (a) 0.0156 (b) 1.56 (c) 0.156 (d) 15.6
  2. 2.0.37 × 39 — where does the decimal point go? (a) 14.43 (b) 0.1443 (c) 144.3 (d) 1.443
  3. 3.6.7 × 9 — where does the decimal point go? (a) 6.03 (b) 0.603 (c) 603 (d) 60.3
  4. 4.4.6 × 0.7 — where does the decimal point go? (a) 0.0322 (b) 32.2 (c) 0.322 (d) 3.22
  5. 5.1.8 × 8 — where does the decimal point go? (a) 144 (b) 1.44 (c) 14.4 (d) 0.144
  6. 6.0.76 × 0.3 — where does the decimal point go? (a) 0.228 (b) 2.28 (c) 0.00228 (d) 0.0228
  7. 7.0.29 × 0.3 — where does the decimal point go? (a) 0.087 (b) 0.87 (c) 0.0087 (d) 0.00087
  8. 8.0.41 × 0.2 — where does the decimal point go? (a) 0.82 (b) 0.0082 (c) 0.082 (d) 0.00082
  9. 9.9.4 × 9 — where does the decimal point go? (a) 84.6 (b) 846 (c) 8.46 (d) 0.846
  10. 10.0.87 × 3 — where does the decimal point go? (a) 0.0261 (b) 0.261 (c) 26.1 (d) 2.61
  11. 11.1.6 × 0.3 — where does the decimal point go? (a) 0.0048 (b) 4.8 (c) 0.048 (d) 0.48
  12. 12.6.6 × 2 — where does the decimal point go? (a) 13.2 (b) 0.132 (c) 1.32 (d) 132
  13. 13.5.2 × 1.1 — where does the decimal point go? (a) 57.2 (b) 5.72 (c) 0.0572 (d) 0.572
  14. 14.0.49 × 16 — where does the decimal point go? (a) 7.84 (b) 0.0784 (c) 0.784 (d) 78.4
  15. 15.2.2 × 8 — where does the decimal point go? (a) 0.176 (b) 1.76 (c) 176 (d) 17.6
  16. 16.6.8 × 46 — where does the decimal point go? (a) 3.128 (b) 31.28 (c) 3128 (d) 312.8
  17. 17.0.83 × 0.6 — where does the decimal point go? (a) 0.00498 (b) 0.498 (c) 0.0498 (d) 4.98
  18. 18.0.93 × 0.8 — where does the decimal point go? (a) 0.744 (b) 0.0744 (c) 7.44 (d) 0.00744
  19. 19.8.1 × 42 — where does the decimal point go? (a) 34.02 (b) 3.402 (c) 340.2 (d) 3402
  20. 20.0.54 × 21 — where does the decimal point go? (a) 1.134 (b) 11.34 (c) 113.4 (d) 0.1134
  21. 21.0.45 × 19 — where does the decimal point go? (a) 8.55 (b) 0.0855 (c) 0.855 (d) 85.5
  22. 22.0.63 × 1.4 — where does the decimal point go? (a) 0.00882 (b) 0.0882 (c) 0.882 (d) 8.82
  23. 23.0.18 × 4.7 — where does the decimal point go? (a) 0.846 (b) 0.00846 (c) 0.0846 (d) 8.46
  24. 24.1.8 × 0.6 — where does the decimal point go? (a) 0.108 (b) 1.08 (c) 10.8 (d) 0.0108
  25. 25.1.6 × 4.1 — where does the decimal point go? (a) 0.656 (b) 6.56 (c) 0.0656 (d) 65.6
  26. 26.0.66 × 4.8 — where does the decimal point go? (a) 0.03168 (b) 31.68 (c) 0.3168 (d) 3.168
  27. 27.4.8 × 7 — where does the decimal point go? (a) 336 (b) 33.6 (c) 3.36 (d) 0.336
  28. 28.0.66 × 1.1 — where does the decimal point go? (a) 0.0726 (b) 0.726 (c) 7.26 (d) 0.00726
  29. 29.5.6 × 2 — where does the decimal point go? (a) 1.12 (b) 11.2 (c) 112 (d) 0.112
  30. 30.0.67 × 3 — where does the decimal point go? (a) 0.201 (b) 0.0201 (c) 2.01 (d) 20.1
  31. 31.0.12 × 3 — where does the decimal point go? (a) 0.36 (b) 0.0036 (c) 3.6 (d) 0.036
  32. 32.0.73 × 1.5 — where does the decimal point go? (a) 1.095 (b) 0.1095 (c) 0.01095 (d) 10.95
  33. 33.0.75 × 2.5 — where does the decimal point go? (a) 0.01875 (b) 1.875 (c) 18.75 (d) 0.1875
  34. 34.2.6 × 0.8 — where does the decimal point go? (a) 0.208 (b) 20.8 (c) 2.08 (d) 0.0208
  35. 35.8.6 × 6 — where does the decimal point go? (a) 516 (b) 0.516 (c) 51.6 (d) 5.16
  36. 36.2.3 × 4.9 — where does the decimal point go? (a) 1.127 (b) 0.1127 (c) 11.27 (d) 112.7
  37. 37.0.95 × 5 — where does the decimal point go? (a) 0.0475 (b) 47.5 (c) 4.75 (d) 0.475
  38. 38.0.83 × 11 — where does the decimal point go? (a) 0.0913 (b) 0.913 (c) 91.3 (d) 9.13
  39. 39.1.6 × 2 — where does the decimal point go? (a) 32 (b) 0.032 (c) 3.2 (d) 0.32
  40. 40.1.9 × 7 — where does the decimal point go? (a) 0.133 (b) 13.3 (c) 1.33 (d) 133

Answer key

  1. 1.56
  2. 14.43
  3. 60.3
  4. 3.22
  5. 14.4
  6. 0.228
  7. 0.087
  8. 0.082
  9. 84.6
  10. 2.61
  11. 0.48
  12. 13.2
  13. 5.72
  14. 7.84
  15. 17.6
  16. 312.8
  17. 0.498
  18. 0.744
  19. 340.2
  20. 11.34
  21. 8.55
  22. 0.882
  23. 0.846
  24. 1.08
  25. 6.56
  26. 3.168
  27. 33.6
  28. 0.726
  29. 11.2
  30. 2.01
  31. 0.36
  32. 1.095
  33. 1.875
  34. 2.08
  35. 51.6
  36. 11.27
  37. 4.75
  38. 9.13
  39. 3.2
  40. 13.3

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