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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 108 · 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. 1.4.6 × 0.9 — where does the decimal point go? (a) 4.14 (b) 0.0414 (c) 0.414 (d) 41.4
  2. 2.0.92 × 0.2 — where does the decimal point go? (a) 0.00184 (b) 1.84 (c) 0.0184 (d) 0.184
  3. 3.0.51 × 2 — where does the decimal point go? (a) 0.0102 (b) 1.02 (c) 0.102 (d) 10.2
  4. 4.0.75 × 9 — where does the decimal point go? (a) 0.0675 (b) 6.75 (c) 0.675 (d) 67.5
  5. 5.4.4 × 3 — where does the decimal point go? (a) 132 (b) 0.132 (c) 1.32 (d) 13.2
  6. 6.3.4 × 0.6 — where does the decimal point go? (a) 0.204 (b) 0.0204 (c) 20.4 (d) 2.04
  7. 7.8.9 × 2 — where does the decimal point go? (a) 17.8 (b) 1.78 (c) 178 (d) 0.178
  8. 8.9.2 × 2 — where does the decimal point go? (a) 1.84 (b) 0.184 (c) 18.4 (d) 184
  9. 9.2.1 × 7 — where does the decimal point go? (a) 1.47 (b) 14.7 (c) 147 (d) 0.147
  10. 10.2.8 × 14 — where does the decimal point go? (a) 39.2 (b) 3.92 (c) 0.392 (d) 392
  11. 11.1.8 × 1.1 — where does the decimal point go? (a) 19.8 (b) 0.0198 (c) 0.198 (d) 1.98
  12. 12.9.7 × 0.5 — where does the decimal point go? (a) 4.85 (b) 48.5 (c) 0.0485 (d) 0.485
  13. 13.5.7 × 0.4 — where does the decimal point go? (a) 22.8 (b) 2.28 (c) 0.228 (d) 0.0228
  14. 14.0.73 × 0.4 — where does the decimal point go? (a) 2.92 (b) 0.0292 (c) 0.00292 (d) 0.292
  15. 15.0.74 × 3 — where does the decimal point go? (a) 0.0222 (b) 22.2 (c) 0.222 (d) 2.22
  16. 16.0.14 × 1.3 — where does the decimal point go? (a) 1.82 (b) 0.0182 (c) 0.182 (d) 0.00182
  17. 17.0.77 × 2.8 — where does the decimal point go? (a) 0.02156 (b) 2.156 (c) 21.56 (d) 0.2156
  18. 18.0.47 × 3.4 — where does the decimal point go? (a) 15.98 (b) 0.1598 (c) 1.598 (d) 0.01598
  19. 19.4.6 × 1.7 — where does the decimal point go? (a) 7.82 (b) 0.782 (c) 78.2 (d) 0.0782
  20. 20.1.5 × 0.3 — where does the decimal point go? (a) 0.045 (b) 0.0045 (c) 4.5 (d) 0.45
  21. 21.0.36 × 3.8 — where does the decimal point go? (a) 0.01368 (b) 13.68 (c) 0.1368 (d) 1.368
  22. 22.5.7 × 1.6 — where does the decimal point go? (a) 9.12 (b) 91.2 (c) 0.0912 (d) 0.912
  23. 23.9.7 × 2.5 — where does the decimal point go? (a) 0.2425 (b) 242.5 (c) 2.425 (d) 24.25
  24. 24.4.9 × 35 — where does the decimal point go? (a) 1.715 (b) 171.5 (c) 17.15 (d) 1715
  25. 25.2.8 × 0.8 — where does the decimal point go? (a) 0.224 (b) 2.24 (c) 22.4 (d) 0.0224
  26. 26.2.3 × 0.3 — where does the decimal point go? (a) 0.0069 (b) 6.9 (c) 0.69 (d) 0.069
  27. 27.3.9 × 5 — where does the decimal point go? (a) 195 (b) 19.5 (c) 0.195 (d) 1.95
  28. 28.0.27 × 27 — where does the decimal point go? (a) 72.9 (b) 7.29 (c) 0.729 (d) 0.0729
  29. 29.0.53 × 3.8 — where does the decimal point go? (a) 0.02014 (b) 0.2014 (c) 2.014 (d) 20.14
  30. 30.0.66 × 14 — where does the decimal point go? (a) 0.924 (b) 0.0924 (c) 9.24 (d) 92.4
  31. 31.2.9 × 3.2 — where does the decimal point go? (a) 0.0928 (b) 0.928 (c) 9.28 (d) 92.8
  32. 32.5.1 × 5 — where does the decimal point go? (a) 255 (b) 0.255 (c) 2.55 (d) 25.5
  33. 33.9.9 × 0.4 — where does the decimal point go? (a) 39.6 (b) 0.0396 (c) 0.396 (d) 3.96
  34. 34.8.7 × 3.8 — where does the decimal point go? (a) 0.3306 (b) 33.06 (c) 330.6 (d) 3.306
  35. 35.5.8 × 0.4 — where does the decimal point go? (a) 0.232 (b) 23.2 (c) 0.0232 (d) 2.32
  36. 36.0.32 × 9 — where does the decimal point go? (a) 2.88 (b) 0.0288 (c) 0.288 (d) 28.8
  37. 37.0.51 × 4.8 — where does the decimal point go? (a) 2.448 (b) 0.2448 (c) 24.48 (d) 0.02448
  38. 38.2.7 × 3.5 — where does the decimal point go? (a) 0.945 (b) 9.45 (c) 0.0945 (d) 94.5
  39. 39.3.6 × 13 — where does the decimal point go? (a) 0.468 (b) 4.68 (c) 46.8 (d) 468
  40. 40.7.7 × 0.9 — where does the decimal point go? (a) 0.0693 (b) 0.693 (c) 69.3 (d) 6.93

Answer key

  1. 4.14
  2. 0.184
  3. 1.02
  4. 6.75
  5. 13.2
  6. 2.04
  7. 17.8
  8. 18.4
  9. 14.7
  10. 39.2
  11. 1.98
  12. 4.85
  13. 2.28
  14. 0.292
  15. 2.22
  16. 0.182
  17. 2.156
  18. 1.598
  19. 7.82
  20. 0.45
  21. 1.368
  22. 9.12
  23. 24.25
  24. 171.5
  25. 2.24
  26. 0.69
  27. 19.5
  28. 7.29
  29. 2.014
  30. 9.24
  31. 9.28
  32. 25.5
  33. 3.96
  34. 33.06
  35. 2.32
  36. 2.88
  37. 2.448
  38. 9.45
  39. 46.8
  40. 6.93

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