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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 958 · 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. 1.0.28 × 2.1 — where does the decimal point go? (a) 5.88 (b) 0.588 (c) 0.0588 (d) 0.00588
  2. 2.3.6 × 0.8 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 28.8 (d) 0.0288
  3. 3.0.34 × 6 — where does the decimal point go? (a) 0.204 (b) 0.0204 (c) 2.04 (d) 20.4
  4. 4.0.82 × 3 — where does the decimal point go? (a) 24.6 (b) 0.246 (c) 0.0246 (d) 2.46
  5. 5.6.4 × 0.8 — where does the decimal point go? (a) 0.512 (b) 5.12 (c) 51.2 (d) 0.0512
  6. 6.0.58 × 0.2 — where does the decimal point go? (a) 0.0116 (b) 0.00116 (c) 0.116 (d) 1.16
  7. 7.0.23 × 0.2 — where does the decimal point go? (a) 0.0046 (b) 0.046 (c) 0.00046 (d) 0.46
  8. 8.3.2 × 2.8 — where does the decimal point go? (a) 0.896 (b) 0.0896 (c) 8.96 (d) 89.6
  9. 9.0.15 × 9 — where does the decimal point go? (a) 0.0135 (b) 1.35 (c) 13.5 (d) 0.135
  10. 10.0.62 × 6 — where does the decimal point go? (a) 3.72 (b) 0.0372 (c) 37.2 (d) 0.372
  11. 11.0.77 × 3.9 — where does the decimal point go? (a) 0.03003 (b) 3.003 (c) 0.3003 (d) 30.03
  12. 12.2.1 × 46 — where does the decimal point go? (a) 0.966 (b) 9.66 (c) 96.6 (d) 966
  13. 13.7.7 × 1.5 — where does the decimal point go? (a) 1.155 (b) 11.55 (c) 115.5 (d) 0.1155
  14. 14.9.4 × 0.3 — where does the decimal point go? (a) 2.82 (b) 28.2 (c) 0.0282 (d) 0.282
  15. 15.3.7 × 1.5 — where does the decimal point go? (a) 5.55 (b) 0.0555 (c) 0.555 (d) 55.5
  16. 16.0.17 × 0.8 — where does the decimal point go? (a) 0.136 (b) 0.0136 (c) 1.36 (d) 0.00136
  17. 17.0.94 × 34 — where does the decimal point go? (a) 31.96 (b) 319.6 (c) 0.3196 (d) 3.196
  18. 18.2.8 × 7 — where does the decimal point go? (a) 0.196 (b) 196 (c) 1.96 (d) 19.6
  19. 19.0.27 × 15 — where does the decimal point go? (a) 4.05 (b) 0.0405 (c) 40.5 (d) 0.405
  20. 20.0.92 × 27 — where does the decimal point go? (a) 2.484 (b) 248.4 (c) 24.84 (d) 0.2484
  21. 21.3.1 × 0.5 — where does the decimal point go? (a) 0.0155 (b) 1.55 (c) 15.5 (d) 0.155
  22. 22.2.4 × 47 — where does the decimal point go? (a) 1128 (b) 11.28 (c) 112.8 (d) 1.128
  23. 23.0.91 × 3.2 — where does the decimal point go? (a) 0.02912 (b) 0.2912 (c) 29.12 (d) 2.912
  24. 24.9.8 × 1.8 — where does the decimal point go? (a) 0.1764 (b) 1.764 (c) 17.64 (d) 176.4
  25. 25.6.7 × 0.3 — where does the decimal point go? (a) 0.0201 (b) 20.1 (c) 2.01 (d) 0.201
  26. 26.4.9 × 23 — where does the decimal point go? (a) 112.7 (b) 1127 (c) 11.27 (d) 1.127
  27. 27.0.39 × 1.7 — where does the decimal point go? (a) 6.63 (b) 0.0663 (c) 0.663 (d) 0.00663
  28. 28.1.6 × 23 — where does the decimal point go? (a) 3.68 (b) 368 (c) 0.368 (d) 36.8
  29. 29.0.52 × 8 — where does the decimal point go? (a) 41.6 (b) 0.416 (c) 4.16 (d) 0.0416
  30. 30.0.81 × 4.6 — where does the decimal point go? (a) 0.03726 (b) 0.3726 (c) 3.726 (d) 37.26
  31. 31.3.1 × 0.8 — where does the decimal point go? (a) 0.0248 (b) 2.48 (c) 24.8 (d) 0.248
  32. 32.0.82 × 6 — where does the decimal point go? (a) 49.2 (b) 0.492 (c) 4.92 (d) 0.0492
  33. 33.7.1 × 0.4 — where does the decimal point go? (a) 2.84 (b) 0.0284 (c) 28.4 (d) 0.284
  34. 34.0.45 × 0.7 — where does the decimal point go? (a) 0.0315 (b) 0.00315 (c) 3.15 (d) 0.315
  35. 35.3.5 × 5 — where does the decimal point go? (a) 0.175 (b) 175 (c) 17.5 (d) 1.75
  36. 36.3.4 × 0.2 — where does the decimal point go? (a) 0.0068 (b) 6.8 (c) 0.068 (d) 0.68
  37. 37.8.5 × 47 — where does the decimal point go? (a) 39.95 (b) 399.5 (c) 3995 (d) 3.995
  38. 38.8.8 × 9 — where does the decimal point go? (a) 792 (b) 7.92 (c) 0.792 (d) 79.2
  39. 39.9.5 × 0.9 — where does the decimal point go? (a) 0.855 (b) 8.55 (c) 0.0855 (d) 85.5
  40. 40.0.13 × 1.1 — where does the decimal point go? (a) 0.0143 (b) 0.143 (c) 1.43 (d) 0.00143

Answer key

  1. 0.588
  2. 2.88
  3. 2.04
  4. 2.46
  5. 5.12
  6. 0.116
  7. 0.046
  8. 8.96
  9. 1.35
  10. 3.72
  11. 3.003
  12. 96.6
  13. 11.55
  14. 2.82
  15. 5.55
  16. 0.136
  17. 31.96
  18. 19.6
  19. 4.05
  20. 24.84
  21. 1.55
  22. 112.8
  23. 2.912
  24. 17.64
  25. 2.01
  26. 112.7
  27. 0.663
  28. 36.8
  29. 4.16
  30. 3.726
  31. 2.48
  32. 4.92
  33. 2.84
  34. 0.315
  35. 17.5
  36. 0.68
  37. 399.5
  38. 79.2
  39. 8.55
  40. 0.143

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