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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 284 · 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. 1.0.52 × 26 — where does the decimal point go? (a) 1.352 (b) 13.52 (c) 0.1352 (d) 135.2
  2. 2.6.4 × 24 — where does the decimal point go? (a) 153.6 (b) 15.36 (c) 1.536 (d) 1536
  3. 3.2.9 × 6 — where does the decimal point go? (a) 174 (b) 1.74 (c) 17.4 (d) 0.174
  4. 4.0.28 × 0.9 — where does the decimal point go? (a) 0.00252 (b) 2.52 (c) 0.0252 (d) 0.252
  5. 5.7.7 × 9 — where does the decimal point go? (a) 69.3 (b) 6.93 (c) 0.693 (d) 693
  6. 6.6.8 × 7 — where does the decimal point go? (a) 47.6 (b) 0.476 (c) 4.76 (d) 476
  7. 7.2.9 × 0.2 — where does the decimal point go? (a) 0.58 (b) 5.8 (c) 0.058 (d) 0.0058
  8. 8.0.25 × 0.7 — where does the decimal point go? (a) 1.75 (b) 0.00175 (c) 0.0175 (d) 0.175
  9. 9.6.8 × 18 — where does the decimal point go? (a) 122.4 (b) 12.24 (c) 1.224 (d) 1224
  10. 10.6.9 × 9 — where does the decimal point go? (a) 0.621 (b) 62.1 (c) 6.21 (d) 621
  11. 11.0.21 × 9 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 18.9 (d) 1.89
  12. 12.0.31 × 0.4 — where does the decimal point go? (a) 0.0124 (b) 0.124 (c) 1.24 (d) 0.00124
  13. 13.0.91 × 3.8 — where does the decimal point go? (a) 0.3458 (b) 3.458 (c) 34.58 (d) 0.03458
  14. 14.0.65 × 0.3 — where does the decimal point go? (a) 0.0195 (b) 0.00195 (c) 0.195 (d) 1.95
  15. 15.0.49 × 3.3 — where does the decimal point go? (a) 1.617 (b) 16.17 (c) 0.01617 (d) 0.1617
  16. 16.0.44 × 24 — where does the decimal point go? (a) 105.6 (b) 1.056 (c) 0.1056 (d) 10.56
  17. 17.0.96 × 8 — where does the decimal point go? (a) 7.68 (b) 0.0768 (c) 76.8 (d) 0.768
  18. 18.8.4 × 3.7 — where does the decimal point go? (a) 3.108 (b) 0.3108 (c) 310.8 (d) 31.08
  19. 19.0.96 × 6 — where does the decimal point go? (a) 0.0576 (b) 0.576 (c) 57.6 (d) 5.76
  20. 20.0.23 × 26 — where does the decimal point go? (a) 59.8 (b) 0.598 (c) 5.98 (d) 0.0598
  21. 21.2.4 × 7 — where does the decimal point go? (a) 1.68 (b) 168 (c) 16.8 (d) 0.168
  22. 22.5.8 × 18 — where does the decimal point go? (a) 1044 (b) 104.4 (c) 10.44 (d) 1.044
  23. 23.7.3 × 4.5 — where does the decimal point go? (a) 328.5 (b) 32.85 (c) 0.3285 (d) 3.285
  24. 24.0.33 × 0.2 — where does the decimal point go? (a) 0.66 (b) 0.00066 (c) 0.066 (d) 0.0066
  25. 25.5.3 × 43 — where does the decimal point go? (a) 2.279 (b) 22.79 (c) 2279 (d) 227.9
  26. 26.2.8 × 22 — where does the decimal point go? (a) 616 (b) 6.16 (c) 61.6 (d) 0.616
  27. 27.2.3 × 0.5 — where does the decimal point go? (a) 0.115 (b) 1.15 (c) 0.0115 (d) 11.5
  28. 28.0.19 × 0.7 — where does the decimal point go? (a) 0.00133 (b) 0.0133 (c) 0.133 (d) 1.33
  29. 29.0.99 × 0.6 — where does the decimal point go? (a) 0.0594 (b) 0.594 (c) 5.94 (d) 0.00594
  30. 30.9.5 × 1.3 — where does the decimal point go? (a) 0.1235 (b) 123.5 (c) 12.35 (d) 1.235
  31. 31.6.8 × 9 — where does the decimal point go? (a) 6.12 (b) 0.612 (c) 612 (d) 61.2
  32. 32.1.8 × 7 — where does the decimal point go? (a) 0.126 (b) 126 (c) 1.26 (d) 12.6
  33. 33.0.78 × 1.9 — where does the decimal point go? (a) 0.01482 (b) 14.82 (c) 1.482 (d) 0.1482
  34. 34.2.4 × 4 — where does the decimal point go? (a) 9.6 (b) 96 (c) 0.096 (d) 0.96
  35. 35.2.3 × 0.4 — where does the decimal point go? (a) 9.2 (b) 0.92 (c) 0.092 (d) 0.0092
  36. 36.0.22 × 0.6 — where does the decimal point go? (a) 0.00132 (b) 0.132 (c) 0.0132 (d) 1.32
  37. 37.0.98 × 0.2 — where does the decimal point go? (a) 0.00196 (b) 0.196 (c) 0.0196 (d) 1.96
  38. 38.0.85 × 0.5 — where does the decimal point go? (a) 0.0425 (b) 0.00425 (c) 4.25 (d) 0.425
  39. 39.5.2 × 9 — where does the decimal point go? (a) 4.68 (b) 0.468 (c) 468 (d) 46.8
  40. 40.0.45 × 3.3 — where does the decimal point go? (a) 0.01485 (b) 14.85 (c) 0.1485 (d) 1.485

Answer key

  1. 13.52
  2. 153.6
  3. 17.4
  4. 0.252
  5. 69.3
  6. 47.6
  7. 0.58
  8. 0.175
  9. 122.4
  10. 62.1
  11. 1.89
  12. 0.124
  13. 3.458
  14. 0.195
  15. 1.617
  16. 10.56
  17. 7.68
  18. 31.08
  19. 5.76
  20. 5.98
  21. 16.8
  22. 104.4
  23. 32.85
  24. 0.066
  25. 227.9
  26. 61.6
  27. 1.15
  28. 0.133
  29. 0.594
  30. 12.35
  31. 61.2
  32. 12.6
  33. 1.482
  34. 9.6
  35. 0.92
  36. 0.132
  37. 0.196
  38. 0.425
  39. 46.8
  40. 1.485

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