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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 641 · 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. 1.2.4 × 8 — where does the decimal point go? (a) 0.192 (b) 19.2 (c) 192 (d) 1.92
  2. 2.3.7 × 1.7 — where does the decimal point go? (a) 6.29 (b) 62.9 (c) 0.629 (d) 0.0629
  3. 3.1.3 × 17 — where does the decimal point go? (a) 22.1 (b) 221 (c) 2.21 (d) 0.221
  4. 4.7.1 × 1.1 — where does the decimal point go? (a) 78.1 (b) 0.0781 (c) 0.781 (d) 7.81
  5. 5.0.37 × 4 — where does the decimal point go? (a) 0.148 (b) 0.0148 (c) 1.48 (d) 14.8
  6. 6.0.37 × 42 — where does the decimal point go? (a) 0.1554 (b) 15.54 (c) 155.4 (d) 1.554
  7. 7.3.4 × 4.2 — where does the decimal point go? (a) 0.1428 (b) 142.8 (c) 14.28 (d) 1.428
  8. 8.0.23 × 0.7 — where does the decimal point go? (a) 0.0161 (b) 1.61 (c) 0.161 (d) 0.00161
  9. 9.0.59 × 3 — where does the decimal point go? (a) 0.177 (b) 0.0177 (c) 1.77 (d) 17.7
  10. 10.0.93 × 0.2 — where does the decimal point go? (a) 1.86 (b) 0.0186 (c) 0.186 (d) 0.00186
  11. 11.7.8 × 0.8 — where does the decimal point go? (a) 6.24 (b) 0.624 (c) 0.0624 (d) 62.4
  12. 12.3.4 × 3 — where does the decimal point go? (a) 1.02 (b) 0.102 (c) 10.2 (d) 102
  13. 13.1.9 × 47 — where does the decimal point go? (a) 893 (b) 89.3 (c) 0.893 (d) 8.93
  14. 14.0.37 × 0.9 — where does the decimal point go? (a) 0.00333 (b) 0.0333 (c) 3.33 (d) 0.333
  15. 15.0.25 × 43 — where does the decimal point go? (a) 0.1075 (b) 1.075 (c) 107.5 (d) 10.75
  16. 16.8.7 × 0.7 — where does the decimal point go? (a) 6.09 (b) 0.0609 (c) 0.609 (d) 60.9
  17. 17.8.2 × 13 — where does the decimal point go? (a) 1.066 (b) 10.66 (c) 1066 (d) 106.6
  18. 18.5.6 × 2 — where does the decimal point go? (a) 0.112 (b) 11.2 (c) 112 (d) 1.12
  19. 19.0.41 × 0.2 — where does the decimal point go? (a) 0.082 (b) 0.00082 (c) 0.0082 (d) 0.82
  20. 20.0.37 × 4.5 — where does the decimal point go? (a) 0.01665 (b) 0.1665 (c) 1.665 (d) 16.65
  21. 21.0.17 × 2 — where does the decimal point go? (a) 0.034 (b) 0.34 (c) 0.0034 (d) 3.4
  22. 22.0.28 × 3.1 — where does the decimal point go? (a) 0.0868 (b) 0.00868 (c) 8.68 (d) 0.868
  23. 23.0.13 × 0.8 — where does the decimal point go? (a) 0.0104 (b) 0.104 (c) 1.04 (d) 0.00104
  24. 24.0.45 × 1.3 — where does the decimal point go? (a) 0.585 (b) 0.00585 (c) 0.0585 (d) 5.85
  25. 25.0.79 × 16 — where does the decimal point go? (a) 126.4 (b) 0.1264 (c) 1.264 (d) 12.64
  26. 26.0.24 × 0.3 — where does the decimal point go? (a) 0.072 (b) 0.72 (c) 0.00072 (d) 0.0072
  27. 27.1.2 × 0.3 — where does the decimal point go? (a) 0.036 (b) 0.36 (c) 3.6 (d) 0.0036
  28. 28.0.39 × 45 — where does the decimal point go? (a) 17.55 (b) 1.755 (c) 0.1755 (d) 175.5
  29. 29.0.79 × 1.1 — where does the decimal point go? (a) 8.69 (b) 0.00869 (c) 0.869 (d) 0.0869
  30. 30.9.4 × 14 — where does the decimal point go? (a) 1.316 (b) 131.6 (c) 1316 (d) 13.16
  31. 31.6.9 × 8 — where does the decimal point go? (a) 0.552 (b) 55.2 (c) 5.52 (d) 552
  32. 32.5.4 × 0.8 — where does the decimal point go? (a) 0.432 (b) 43.2 (c) 4.32 (d) 0.0432
  33. 33.2.2 × 17 — where does the decimal point go? (a) 374 (b) 37.4 (c) 0.374 (d) 3.74
  34. 34.3.1 × 0.4 — where does the decimal point go? (a) 0.0124 (b) 0.124 (c) 1.24 (d) 12.4
  35. 35.0.14 × 0.9 — where does the decimal point go? (a) 1.26 (b) 0.00126 (c) 0.126 (d) 0.0126
  36. 36.0.13 × 7 — where does the decimal point go? (a) 0.0091 (b) 0.091 (c) 9.1 (d) 0.91
  37. 37.0.74 × 46 — where does the decimal point go? (a) 3.404 (b) 34.04 (c) 340.4 (d) 0.3404
  38. 38.0.57 × 6 — where does the decimal point go? (a) 0.342 (b) 0.0342 (c) 3.42 (d) 34.2
  39. 39.7.9 × 0.2 — where does the decimal point go? (a) 0.158 (b) 1.58 (c) 0.0158 (d) 15.8
  40. 40.6.1 × 6 — where does the decimal point go? (a) 36.6 (b) 0.366 (c) 366 (d) 3.66

Answer key

  1. 19.2
  2. 6.29
  3. 22.1
  4. 7.81
  5. 1.48
  6. 15.54
  7. 14.28
  8. 0.161
  9. 1.77
  10. 0.186
  11. 6.24
  12. 10.2
  13. 89.3
  14. 0.333
  15. 10.75
  16. 6.09
  17. 106.6
  18. 11.2
  19. 0.082
  20. 1.665
  21. 0.34
  22. 0.868
  23. 0.104
  24. 0.585
  25. 12.64
  26. 0.072
  27. 0.36
  28. 17.55
  29. 0.869
  30. 131.6
  31. 55.2
  32. 4.32
  33. 37.4
  34. 1.24
  35. 0.126
  36. 0.91
  37. 34.04
  38. 3.42
  39. 1.58
  40. 36.6

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