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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 951 · 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. 1.0.34 × 0.2 — where does the decimal point go? (a) 0.00068 (b) 0.68 (c) 0.0068 (d) 0.068
  2. 2.4.9 × 34 — where does the decimal point go? (a) 16.66 (b) 166.6 (c) 1666 (d) 1.666
  3. 3.9.3 × 0.4 — where does the decimal point go? (a) 0.0372 (b) 3.72 (c) 37.2 (d) 0.372
  4. 4.5.4 × 0.3 — where does the decimal point go? (a) 0.0162 (b) 0.162 (c) 1.62 (d) 16.2
  5. 5.0.33 × 0.9 — where does the decimal point go? (a) 0.297 (b) 0.0297 (c) 0.00297 (d) 2.97
  6. 6.6.2 × 0.4 — where does the decimal point go? (a) 0.248 (b) 0.0248 (c) 24.8 (d) 2.48
  7. 7.6.5 × 2.7 — where does the decimal point go? (a) 0.1755 (b) 1.755 (c) 17.55 (d) 175.5
  8. 8.0.83 × 3 — where does the decimal point go? (a) 0.0249 (b) 0.249 (c) 24.9 (d) 2.49
  9. 9.0.67 × 1.4 — where does the decimal point go? (a) 0.938 (b) 9.38 (c) 0.0938 (d) 0.00938
  10. 10.8.9 × 1.9 — where does the decimal point go? (a) 0.1691 (b) 1.691 (c) 16.91 (d) 169.1
  11. 11.1.5 × 3 — where does the decimal point go? (a) 0.45 (b) 0.045 (c) 45 (d) 4.5
  12. 12.3.6 × 16 — where does the decimal point go? (a) 0.576 (b) 57.6 (c) 5.76 (d) 576
  13. 13.5.9 × 0.2 — where does the decimal point go? (a) 0.0118 (b) 11.8 (c) 0.118 (d) 1.18
  14. 14.0.59 × 1.2 — where does the decimal point go? (a) 0.708 (b) 0.00708 (c) 0.0708 (d) 7.08
  15. 15.0.99 × 0.8 — where does the decimal point go? (a) 0.792 (b) 0.00792 (c) 7.92 (d) 0.0792
  16. 16.0.73 × 1.6 — where does the decimal point go? (a) 1.168 (b) 0.1168 (c) 11.68 (d) 0.01168
  17. 17.0.92 × 3.7 — where does the decimal point go? (a) 34.04 (b) 0.03404 (c) 3.404 (d) 0.3404
  18. 18.7.6 × 0.3 — where does the decimal point go? (a) 0.228 (b) 0.0228 (c) 2.28 (d) 22.8
  19. 19.3.8 × 28 — where does the decimal point go? (a) 1.064 (b) 10.64 (c) 106.4 (d) 1064
  20. 20.0.67 × 42 — where does the decimal point go? (a) 28.14 (b) 2.814 (c) 281.4 (d) 0.2814
  21. 21.0.31 × 2 — where does the decimal point go? (a) 6.2 (b) 0.0062 (c) 0.62 (d) 0.062
  22. 22.0.27 × 16 — where does the decimal point go? (a) 4.32 (b) 43.2 (c) 0.0432 (d) 0.432
  23. 23.0.46 × 47 — where does the decimal point go? (a) 21.62 (b) 216.2 (c) 0.2162 (d) 2.162
  24. 24.0.69 × 23 — where does the decimal point go? (a) 15.87 (b) 0.1587 (c) 1.587 (d) 158.7
  25. 25.9.9 × 0.5 — where does the decimal point go? (a) 0.495 (b) 49.5 (c) 0.0495 (d) 4.95
  26. 26.0.81 × 3 — where does the decimal point go? (a) 0.0243 (b) 24.3 (c) 2.43 (d) 0.243
  27. 27.4.3 × 4 — where does the decimal point go? (a) 172 (b) 17.2 (c) 1.72 (d) 0.172
  28. 28.0.34 × 2 — where does the decimal point go? (a) 0.068 (b) 0.0068 (c) 6.8 (d) 0.68
  29. 29.0.58 × 0.3 — where does the decimal point go? (a) 1.74 (b) 0.00174 (c) 0.0174 (d) 0.174
  30. 30.0.61 × 0.2 — where does the decimal point go? (a) 0.0122 (b) 0.00122 (c) 1.22 (d) 0.122
  31. 31.0.51 × 5 — where does the decimal point go? (a) 0.255 (b) 0.0255 (c) 2.55 (d) 25.5
  32. 32.0.48 × 0.8 — where does the decimal point go? (a) 0.00384 (b) 0.0384 (c) 0.384 (d) 3.84
  33. 33.3.7 × 0.6 — where does the decimal point go? (a) 0.0222 (b) 0.222 (c) 22.2 (d) 2.22
  34. 34.0.86 × 0.2 — where does the decimal point go? (a) 0.172 (b) 0.0172 (c) 0.00172 (d) 1.72
  35. 35.6.4 × 7 — where does the decimal point go? (a) 44.8 (b) 0.448 (c) 448 (d) 4.48
  36. 36.0.96 × 4.2 — where does the decimal point go? (a) 0.04032 (b) 0.4032 (c) 4.032 (d) 40.32
  37. 37.2.9 × 7 — where does the decimal point go? (a) 0.203 (b) 20.3 (c) 2.03 (d) 203
  38. 38.0.48 × 0.9 — where does the decimal point go? (a) 0.432 (b) 4.32 (c) 0.0432 (d) 0.00432
  39. 39.8.7 × 9 — where does the decimal point go? (a) 0.783 (b) 78.3 (c) 7.83 (d) 783
  40. 40.0.43 × 3 — where does the decimal point go? (a) 0.0129 (b) 1.29 (c) 0.129 (d) 12.9

Answer key

  1. 0.068
  2. 166.6
  3. 3.72
  4. 1.62
  5. 0.297
  6. 2.48
  7. 17.55
  8. 2.49
  9. 0.938
  10. 16.91
  11. 4.5
  12. 57.6
  13. 1.18
  14. 0.708
  15. 0.792
  16. 1.168
  17. 3.404
  18. 2.28
  19. 106.4
  20. 28.14
  21. 0.62
  22. 4.32
  23. 21.62
  24. 15.87
  25. 4.95
  26. 2.43
  27. 17.2
  28. 0.68
  29. 0.174
  30. 0.122
  31. 2.55
  32. 0.384
  33. 2.22
  34. 0.172
  35. 44.8
  36. 4.032
  37. 20.3
  38. 0.432
  39. 78.3
  40. 1.29

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