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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 46 · 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. 1.0.19 × 9 — where does the decimal point go? (a) 17.1 (b) 1.71 (c) 0.171 (d) 0.0171
  2. 2.0.63 × 1.5 — where does the decimal point go? (a) 0.945 (b) 0.0945 (c) 0.00945 (d) 9.45
  3. 3.0.95 × 5 — where does the decimal point go? (a) 4.75 (b) 0.475 (c) 47.5 (d) 0.0475
  4. 4.0.96 × 2.2 — where does the decimal point go? (a) 2.112 (b) 0.2112 (c) 0.02112 (d) 21.12
  5. 5.6.2 × 3.2 — where does the decimal point go? (a) 19.84 (b) 0.1984 (c) 198.4 (d) 1.984
  6. 6.0.16 × 18 — where does the decimal point go? (a) 0.288 (b) 28.8 (c) 0.0288 (d) 2.88
  7. 7.0.15 × 33 — where does the decimal point go? (a) 4.95 (b) 0.0495 (c) 49.5 (d) 0.495
  8. 8.3.1 × 6 — where does the decimal point go? (a) 0.186 (b) 18.6 (c) 1.86 (d) 186
  9. 9.0.57 × 48 — where does the decimal point go? (a) 2.736 (b) 273.6 (c) 0.2736 (d) 27.36
  10. 10.0.86 × 3.6 — where does the decimal point go? (a) 0.3096 (b) 0.03096 (c) 30.96 (d) 3.096
  11. 11.1.7 × 2 — where does the decimal point go? (a) 3.4 (b) 34 (c) 0.34 (d) 0.034
  12. 12.1.9 × 0.5 — where does the decimal point go? (a) 0.0095 (b) 9.5 (c) 0.95 (d) 0.095
  13. 13.0.26 × 42 — where does the decimal point go? (a) 109.2 (b) 10.92 (c) 0.1092 (d) 1.092
  14. 14.3.7 × 0.2 — where does the decimal point go? (a) 0.0074 (b) 7.4 (c) 0.074 (d) 0.74
  15. 15.1.8 × 0.7 — where does the decimal point go? (a) 12.6 (b) 0.0126 (c) 1.26 (d) 0.126
  16. 16.1.2 × 6 — where does the decimal point go? (a) 0.72 (b) 72 (c) 7.2 (d) 0.072
  17. 17.0.68 × 9 — where does the decimal point go? (a) 61.2 (b) 0.612 (c) 0.0612 (d) 6.12
  18. 18.6.8 × 0.2 — where does the decimal point go? (a) 1.36 (b) 0.0136 (c) 0.136 (d) 13.6
  19. 19.1.9 × 6 — where does the decimal point go? (a) 11.4 (b) 114 (c) 0.114 (d) 1.14
  20. 20.8.1 × 47 — where does the decimal point go? (a) 38.07 (b) 380.7 (c) 3807 (d) 3.807
  21. 21.0.87 × 6 — where does the decimal point go? (a) 52.2 (b) 0.522 (c) 5.22 (d) 0.0522
  22. 22.9.1 × 2.8 — where does the decimal point go? (a) 2.548 (b) 0.2548 (c) 25.48 (d) 254.8
  23. 23.8.9 × 0.5 — where does the decimal point go? (a) 44.5 (b) 0.445 (c) 0.0445 (d) 4.45
  24. 24.0.33 × 0.6 — where does the decimal point go? (a) 0.0198 (b) 0.198 (c) 1.98 (d) 0.00198
  25. 25.0.44 × 23 — where does the decimal point go? (a) 10.12 (b) 1.012 (c) 101.2 (d) 0.1012
  26. 26.0.36 × 11 — where does the decimal point go? (a) 0.0396 (b) 0.396 (c) 3.96 (d) 39.6
  27. 27.3.9 × 4 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 15.6 (d) 156
  28. 28.0.28 × 0.4 — where does the decimal point go? (a) 0.112 (b) 0.00112 (c) 0.0112 (d) 1.12
  29. 29.5.4 × 1.1 — where does the decimal point go? (a) 0.0594 (b) 59.4 (c) 0.594 (d) 5.94
  30. 30.1.7 × 0.3 — where does the decimal point go? (a) 0.051 (b) 5.1 (c) 0.51 (d) 0.0051
  31. 31.0.45 × 7 — where does the decimal point go? (a) 0.315 (b) 31.5 (c) 3.15 (d) 0.0315
  32. 32.1.3 × 8 — where does the decimal point go? (a) 10.4 (b) 104 (c) 1.04 (d) 0.104
  33. 33.1.7 × 7 — where does the decimal point go? (a) 1.19 (b) 119 (c) 0.119 (d) 11.9
  34. 34.0.12 × 4.8 — where does the decimal point go? (a) 0.0576 (b) 0.00576 (c) 5.76 (d) 0.576
  35. 35.7.7 × 0.6 — where does the decimal point go? (a) 0.0462 (b) 4.62 (c) 46.2 (d) 0.462
  36. 36.0.62 × 3.1 — where does the decimal point go? (a) 1.922 (b) 0.01922 (c) 0.1922 (d) 19.22
  37. 37.2.4 × 7 — where does the decimal point go? (a) 1.68 (b) 0.168 (c) 16.8 (d) 168
  38. 38.0.61 × 2.1 — where does the decimal point go? (a) 0.01281 (b) 1.281 (c) 12.81 (d) 0.1281
  39. 39.5.2 × 0.7 — where does the decimal point go? (a) 3.64 (b) 0.364 (c) 36.4 (d) 0.0364
  40. 40.7.2 × 2.3 — where does the decimal point go? (a) 1.656 (b) 0.1656 (c) 16.56 (d) 165.6

Answer key

  1. 1.71
  2. 0.945
  3. 4.75
  4. 2.112
  5. 19.84
  6. 2.88
  7. 4.95
  8. 18.6
  9. 27.36
  10. 3.096
  11. 3.4
  12. 0.95
  13. 10.92
  14. 0.74
  15. 1.26
  16. 7.2
  17. 6.12
  18. 1.36
  19. 11.4
  20. 380.7
  21. 5.22
  22. 25.48
  23. 4.45
  24. 0.198
  25. 10.12
  26. 3.96
  27. 15.6
  28. 0.112
  29. 5.94
  30. 0.51
  31. 3.15
  32. 10.4
  33. 11.9
  34. 0.576
  35. 4.62
  36. 1.922
  37. 16.8
  38. 1.281
  39. 3.64
  40. 16.56

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