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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 264 · 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. 1.4.2 × 27 — where does the decimal point go? (a) 1134 (b) 113.4 (c) 1.134 (d) 11.34
  2. 2.6.9 × 7 — where does the decimal point go? (a) 4.83 (b) 0.483 (c) 483 (d) 48.3
  3. 3.3.9 × 34 — where does the decimal point go? (a) 132.6 (b) 1.326 (c) 13.26 (d) 1326
  4. 4.3.4 × 3.2 — where does the decimal point go? (a) 1.088 (b) 10.88 (c) 0.1088 (d) 108.8
  5. 5.7.4 × 8 — where does the decimal point go? (a) 0.592 (b) 5.92 (c) 592 (d) 59.2
  6. 6.0.26 × 2 — where does the decimal point go? (a) 0.0052 (b) 0.52 (c) 5.2 (d) 0.052
  7. 7.0.89 × 0.3 — where does the decimal point go? (a) 0.0267 (b) 0.267 (c) 2.67 (d) 0.00267
  8. 8.0.14 × 4.2 — where does the decimal point go? (a) 0.0588 (b) 0.588 (c) 5.88 (d) 0.00588
  9. 9.9.5 × 27 — where does the decimal point go? (a) 2.565 (b) 25.65 (c) 256.5 (d) 2565
  10. 10.0.42 × 4 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 16.8 (d) 0.0168
  11. 11.9.2 × 0.9 — where does the decimal point go? (a) 8.28 (b) 0.0828 (c) 0.828 (d) 82.8
  12. 12.8.9 × 0.9 — where does the decimal point go? (a) 8.01 (b) 0.0801 (c) 80.1 (d) 0.801
  13. 13.6.6 × 12 — where does the decimal point go? (a) 79.2 (b) 7.92 (c) 792 (d) 0.792
  14. 14.7.8 × 48 — where does the decimal point go? (a) 3744 (b) 37.44 (c) 3.744 (d) 374.4
  15. 15.2.6 × 0.2 — where does the decimal point go? (a) 0.0052 (b) 0.52 (c) 0.052 (d) 5.2
  16. 16.0.24 × 4 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 9.6 (d) 0.096
  17. 17.3.6 × 27 — where does the decimal point go? (a) 9.72 (b) 97.2 (c) 972 (d) 0.972
  18. 18.2.4 × 0.3 — where does the decimal point go? (a) 0.0072 (b) 7.2 (c) 0.072 (d) 0.72
  19. 19.0.86 × 0.3 — where does the decimal point go? (a) 0.0258 (b) 2.58 (c) 0.258 (d) 0.00258
  20. 20.0.72 × 26 — where does the decimal point go? (a) 1.872 (b) 187.2 (c) 18.72 (d) 0.1872
  21. 21.0.65 × 3 — where does the decimal point go? (a) 19.5 (b) 0.0195 (c) 0.195 (d) 1.95
  22. 22.3.7 × 2.4 — where does the decimal point go? (a) 0.888 (b) 0.0888 (c) 8.88 (d) 88.8
  23. 23.8.9 × 1.9 — where does the decimal point go? (a) 0.1691 (b) 1.691 (c) 16.91 (d) 169.1
  24. 24.1.8 × 3.4 — where does the decimal point go? (a) 0.0612 (b) 6.12 (c) 61.2 (d) 0.612
  25. 25.0.32 × 7 — where does the decimal point go? (a) 0.224 (b) 0.0224 (c) 22.4 (d) 2.24
  26. 26.6.9 × 0.8 — where does the decimal point go? (a) 0.0552 (b) 5.52 (c) 0.552 (d) 55.2
  27. 27.0.66 × 13 — where does the decimal point go? (a) 0.858 (b) 8.58 (c) 0.0858 (d) 85.8
  28. 28.0.48 × 0.2 — where does the decimal point go? (a) 0.00096 (b) 0.96 (c) 0.0096 (d) 0.096
  29. 29.0.63 × 3 — where does the decimal point go? (a) 0.189 (b) 18.9 (c) 1.89 (d) 0.0189
  30. 30.0.39 × 0.8 — where does the decimal point go? (a) 0.312 (b) 0.0312 (c) 0.00312 (d) 3.12
  31. 31.7.8 × 8 — where does the decimal point go? (a) 62.4 (b) 6.24 (c) 624 (d) 0.624
  32. 32.7.7 × 2 — where does the decimal point go? (a) 1.54 (b) 15.4 (c) 0.154 (d) 154
  33. 33.0.36 × 7 — where does the decimal point go? (a) 25.2 (b) 0.0252 (c) 0.252 (d) 2.52
  34. 34.0.78 × 2 — where does the decimal point go? (a) 15.6 (b) 0.0156 (c) 1.56 (d) 0.156
  35. 35.1.9 × 1.6 — where does the decimal point go? (a) 30.4 (b) 3.04 (c) 0.0304 (d) 0.304
  36. 36.6.6 × 39 — where does the decimal point go? (a) 2574 (b) 25.74 (c) 257.4 (d) 2.574
  37. 37.9.4 × 0.7 — where does the decimal point go? (a) 0.658 (b) 65.8 (c) 6.58 (d) 0.0658
  38. 38.1.6 × 7 — where does the decimal point go? (a) 11.2 (b) 1.12 (c) 0.112 (d) 112
  39. 39.1.6 × 0.4 — where does the decimal point go? (a) 6.4 (b) 0.064 (c) 0.0064 (d) 0.64
  40. 40.0.36 × 0.6 — where does the decimal point go? (a) 0.00216 (b) 0.216 (c) 2.16 (d) 0.0216

Answer key

  1. 113.4
  2. 48.3
  3. 132.6
  4. 10.88
  5. 59.2
  6. 0.52
  7. 0.267
  8. 0.588
  9. 256.5
  10. 1.68
  11. 8.28
  12. 8.01
  13. 79.2
  14. 374.4
  15. 0.52
  16. 0.96
  17. 97.2
  18. 0.72
  19. 0.258
  20. 18.72
  21. 1.95
  22. 8.88
  23. 16.91
  24. 6.12
  25. 2.24
  26. 5.52
  27. 8.58
  28. 0.096
  29. 1.89
  30. 0.312
  31. 62.4
  32. 15.4
  33. 2.52
  34. 1.56
  35. 3.04
  36. 257.4
  37. 6.58
  38. 11.2
  39. 0.64
  40. 0.216

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