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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 649 · 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. 1.6.6 × 0.6 — where does the decimal point go? (a) 3.96 (b) 39.6 (c) 0.396 (d) 0.0396
  2. 2.0.88 × 26 — where does the decimal point go? (a) 0.2288 (b) 22.88 (c) 228.8 (d) 2.288
  3. 3.9.1 × 7 — where does the decimal point go? (a) 0.637 (b) 637 (c) 6.37 (d) 63.7
  4. 4.6.5 × 3 — where does the decimal point go? (a) 0.195 (b) 1.95 (c) 195 (d) 19.5
  5. 5.3.6 × 42 — where does the decimal point go? (a) 1.512 (b) 151.2 (c) 15.12 (d) 1512
  6. 6.7.3 × 8 — where does the decimal point go? (a) 58.4 (b) 584 (c) 0.584 (d) 5.84
  7. 7.3.2 × 0.7 — where does the decimal point go? (a) 0.224 (b) 2.24 (c) 0.0224 (d) 22.4
  8. 8.0.12 × 17 — where does the decimal point go? (a) 0.204 (b) 20.4 (c) 2.04 (d) 0.0204
  9. 9.0.36 × 24 — where does the decimal point go? (a) 0.0864 (b) 8.64 (c) 86.4 (d) 0.864
  10. 10.2.7 × 0.9 — where does the decimal point go? (a) 0.243 (b) 0.0243 (c) 2.43 (d) 24.3
  11. 11.6.5 × 47 — where does the decimal point go? (a) 30.55 (b) 3.055 (c) 3055 (d) 305.5
  12. 12.0.97 × 1.8 — where does the decimal point go? (a) 0.01746 (b) 0.1746 (c) 17.46 (d) 1.746
  13. 13.3.1 × 1.3 — where does the decimal point go? (a) 0.403 (b) 0.0403 (c) 40.3 (d) 4.03
  14. 14.0.15 × 19 — where does the decimal point go? (a) 0.285 (b) 0.0285 (c) 28.5 (d) 2.85
  15. 15.0.16 × 0.4 — where does the decimal point go? (a) 0.0064 (b) 0.00064 (c) 0.64 (d) 0.064
  16. 16.9.3 × 23 — where does the decimal point go? (a) 2.139 (b) 213.9 (c) 21.39 (d) 2139
  17. 17.4.7 × 4.7 — where does the decimal point go? (a) 2.209 (b) 220.9 (c) 0.2209 (d) 22.09
  18. 18.5.3 × 0.9 — where does the decimal point go? (a) 0.0477 (b) 47.7 (c) 4.77 (d) 0.477
  19. 19.2.3 × 8 — where does the decimal point go? (a) 18.4 (b) 1.84 (c) 184 (d) 0.184
  20. 20.9.6 × 11 — where does the decimal point go? (a) 105.6 (b) 10.56 (c) 1056 (d) 1.056
  21. 21.0.49 × 9 — where does the decimal point go? (a) 0.441 (b) 4.41 (c) 0.0441 (d) 44.1
  22. 22.0.43 × 17 — where does the decimal point go? (a) 7.31 (b) 0.731 (c) 0.0731 (d) 73.1
  23. 23.0.14 × 19 — where does the decimal point go? (a) 26.6 (b) 0.266 (c) 0.0266 (d) 2.66
  24. 24.1.6 × 4 — where does the decimal point go? (a) 0.64 (b) 0.064 (c) 6.4 (d) 64
  25. 25.0.31 × 26 — where does the decimal point go? (a) 0.0806 (b) 0.806 (c) 80.6 (d) 8.06
  26. 26.0.72 × 0.3 — where does the decimal point go? (a) 0.0216 (b) 2.16 (c) 0.00216 (d) 0.216
  27. 27.0.32 × 37 — where does the decimal point go? (a) 11.84 (b) 118.4 (c) 0.1184 (d) 1.184
  28. 28.5.8 × 0.2 — where does the decimal point go? (a) 0.0116 (b) 11.6 (c) 1.16 (d) 0.116
  29. 29.3.6 × 0.3 — where does the decimal point go? (a) 0.108 (b) 1.08 (c) 0.0108 (d) 10.8
  30. 30.2.1 × 9 — where does the decimal point go? (a) 0.189 (b) 189 (c) 1.89 (d) 18.9
  31. 31.9.1 × 9 — where does the decimal point go? (a) 8.19 (b) 819 (c) 0.819 (d) 81.9
  32. 32.0.23 × 2.5 — where does the decimal point go? (a) 0.0575 (b) 0.575 (c) 5.75 (d) 0.00575
  33. 33.1.9 × 28 — where does the decimal point go? (a) 5.32 (b) 0.532 (c) 53.2 (d) 532
  34. 34.6.6 × 7 — where does the decimal point go? (a) 4.62 (b) 0.462 (c) 462 (d) 46.2
  35. 35.0.38 × 9 — where does the decimal point go? (a) 3.42 (b) 0.342 (c) 34.2 (d) 0.0342
  36. 36.2.7 × 2.2 — where does the decimal point go? (a) 59.4 (b) 0.594 (c) 5.94 (d) 0.0594
  37. 37.3.9 × 7 — where does the decimal point go? (a) 27.3 (b) 2.73 (c) 273 (d) 0.273
  38. 38.2.9 × 2 — where does the decimal point go? (a) 0.058 (b) 58 (c) 0.58 (d) 5.8
  39. 39.0.38 × 4 — where does the decimal point go? (a) 0.152 (b) 15.2 (c) 0.0152 (d) 1.52
  40. 40.7.3 × 15 — where does the decimal point go? (a) 10.95 (b) 1.095 (c) 1095 (d) 109.5

Answer key

  1. 3.96
  2. 22.88
  3. 63.7
  4. 19.5
  5. 151.2
  6. 58.4
  7. 2.24
  8. 2.04
  9. 8.64
  10. 2.43
  11. 305.5
  12. 1.746
  13. 4.03
  14. 2.85
  15. 0.064
  16. 213.9
  17. 22.09
  18. 4.77
  19. 18.4
  20. 105.6
  21. 4.41
  22. 7.31
  23. 2.66
  24. 6.4
  25. 8.06
  26. 0.216
  27. 11.84
  28. 1.16
  29. 1.08
  30. 18.9
  31. 81.9
  32. 0.575
  33. 53.2
  34. 46.2
  35. 3.42
  36. 5.94
  37. 27.3
  38. 5.8
  39. 1.52
  40. 109.5

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