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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 819 · 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. 1.2.2 × 0.8 — where does the decimal point go? (a) 0.176 (b) 1.76 (c) 17.6 (d) 0.0176
  2. 2.4.6 × 1.2 — where does the decimal point go? (a) 5.52 (b) 0.552 (c) 0.0552 (d) 55.2
  3. 3.0.26 × 2.9 — where does the decimal point go? (a) 0.0754 (b) 7.54 (c) 0.00754 (d) 0.754
  4. 4.1.7 × 5 — where does the decimal point go? (a) 85 (b) 0.085 (c) 0.85 (d) 8.5
  5. 5.3.4 × 28 — where does the decimal point go? (a) 95.2 (b) 0.952 (c) 9.52 (d) 952
  6. 6.9.8 × 8 — where does the decimal point go? (a) 7.84 (b) 784 (c) 0.784 (d) 78.4
  7. 7.0.21 × 4.7 — where does the decimal point go? (a) 0.00987 (b) 0.987 (c) 0.0987 (d) 9.87
  8. 8.9.3 × 18 — where does the decimal point go? (a) 1674 (b) 167.4 (c) 16.74 (d) 1.674
  9. 9.1.7 × 49 — where does the decimal point go? (a) 83.3 (b) 833 (c) 0.833 (d) 8.33
  10. 10.0.48 × 0.8 — where does the decimal point go? (a) 3.84 (b) 0.00384 (c) 0.0384 (d) 0.384
  11. 11.0.61 × 3.5 — where does the decimal point go? (a) 2.135 (b) 21.35 (c) 0.02135 (d) 0.2135
  12. 12.8.1 × 0.4 — where does the decimal point go? (a) 0.0324 (b) 32.4 (c) 0.324 (d) 3.24
  13. 13.4.3 × 0.3 — where does the decimal point go? (a) 1.29 (b) 0.129 (c) 0.0129 (d) 12.9
  14. 14.2.8 × 3.7 — where does the decimal point go? (a) 103.6 (b) 10.36 (c) 1.036 (d) 0.1036
  15. 15.0.74 × 6 — where does the decimal point go? (a) 4.44 (b) 44.4 (c) 0.0444 (d) 0.444
  16. 16.0.18 × 3.7 — where does the decimal point go? (a) 0.666 (b) 6.66 (c) 0.0666 (d) 0.00666
  17. 17.1.4 × 2 — where does the decimal point go? (a) 0.028 (b) 0.28 (c) 28 (d) 2.8
  18. 18.0.43 × 5 — where does the decimal point go? (a) 0.215 (b) 21.5 (c) 2.15 (d) 0.0215
  19. 19.9.4 × 2.1 — where does the decimal point go? (a) 19.74 (b) 197.4 (c) 0.1974 (d) 1.974
  20. 20.5.1 × 2.5 — where does the decimal point go? (a) 1.275 (b) 127.5 (c) 0.1275 (d) 12.75
  21. 21.0.75 × 33 — where does the decimal point go? (a) 24.75 (b) 2.475 (c) 0.2475 (d) 247.5
  22. 22.0.86 × 9 — where does the decimal point go? (a) 77.4 (b) 7.74 (c) 0.0774 (d) 0.774
  23. 23.3.5 × 5 — where does the decimal point go? (a) 17.5 (b) 0.175 (c) 1.75 (d) 175
  24. 24.3.6 × 0.6 — where does the decimal point go? (a) 21.6 (b) 0.0216 (c) 0.216 (d) 2.16
  25. 25.2.7 × 0.5 — where does the decimal point go? (a) 13.5 (b) 0.135 (c) 1.35 (d) 0.0135
  26. 26.7.1 × 0.7 — where does the decimal point go? (a) 0.0497 (b) 4.97 (c) 49.7 (d) 0.497
  27. 27.9.4 × 0.2 — where does the decimal point go? (a) 1.88 (b) 0.188 (c) 18.8 (d) 0.0188
  28. 28.0.43 × 23 — where does the decimal point go? (a) 0.989 (b) 0.0989 (c) 9.89 (d) 98.9
  29. 29.1.4 × 9 — where does the decimal point go? (a) 0.126 (b) 12.6 (c) 1.26 (d) 126
  30. 30.0.91 × 0.6 — where does the decimal point go? (a) 0.546 (b) 0.0546 (c) 0.00546 (d) 5.46
  31. 31.0.48 × 43 — where does the decimal point go? (a) 0.2064 (b) 20.64 (c) 206.4 (d) 2.064
  32. 32.4.3 × 3.3 — where does the decimal point go? (a) 14.19 (b) 141.9 (c) 1.419 (d) 0.1419
  33. 33.3.8 × 0.2 — where does the decimal point go? (a) 0.0076 (b) 7.6 (c) 0.76 (d) 0.076
  34. 34.2.8 × 17 — where does the decimal point go? (a) 47.6 (b) 0.476 (c) 4.76 (d) 476
  35. 35.1.2 × 3.8 — where does the decimal point go? (a) 0.0456 (b) 4.56 (c) 0.456 (d) 45.6
  36. 36.0.58 × 0.4 — where does the decimal point go? (a) 0.232 (b) 2.32 (c) 0.0232 (d) 0.00232
  37. 37.0.57 × 3.9 — where does the decimal point go? (a) 0.2223 (b) 22.23 (c) 0.02223 (d) 2.223
  38. 38.7.7 × 8 — where does the decimal point go? (a) 0.616 (b) 616 (c) 61.6 (d) 6.16
  39. 39.3.4 × 3.6 — where does the decimal point go? (a) 1.224 (b) 122.4 (c) 0.1224 (d) 12.24
  40. 40.0.83 × 13 — where does the decimal point go? (a) 0.1079 (b) 10.79 (c) 1.079 (d) 107.9

Answer key

  1. 1.76
  2. 5.52
  3. 0.754
  4. 8.5
  5. 95.2
  6. 78.4
  7. 0.987
  8. 167.4
  9. 83.3
  10. 0.384
  11. 2.135
  12. 3.24
  13. 1.29
  14. 10.36
  15. 4.44
  16. 0.666
  17. 2.8
  18. 2.15
  19. 19.74
  20. 12.75
  21. 24.75
  22. 7.74
  23. 17.5
  24. 2.16
  25. 1.35
  26. 4.97
  27. 1.88
  28. 9.89
  29. 12.6
  30. 0.546
  31. 20.64
  32. 14.19
  33. 0.76
  34. 47.6
  35. 4.56
  36. 0.232
  37. 2.223
  38. 61.6
  39. 12.24
  40. 10.79

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