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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 848 · 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. 1.0.92 × 14 — where does the decimal point go? (a) 0.1288 (b) 128.8 (c) 12.88 (d) 1.288
  2. 2.1.9 × 3.4 — where does the decimal point go? (a) 0.0646 (b) 64.6 (c) 6.46 (d) 0.646
  3. 3.6.1 × 3 — where does the decimal point go? (a) 1.83 (b) 18.3 (c) 0.183 (d) 183
  4. 4.9.9 × 8 — where does the decimal point go? (a) 792 (b) 0.792 (c) 79.2 (d) 7.92
  5. 5.0.27 × 8 — where does the decimal point go? (a) 21.6 (b) 2.16 (c) 0.216 (d) 0.0216
  6. 6.0.41 × 2.9 — where does the decimal point go? (a) 11.89 (b) 0.1189 (c) 1.189 (d) 0.01189
  7. 7.8.6 × 3 — where does the decimal point go? (a) 2.58 (b) 258 (c) 25.8 (d) 0.258
  8. 8.0.63 × 4 — where does the decimal point go? (a) 0.0252 (b) 2.52 (c) 25.2 (d) 0.252
  9. 9.3.2 × 0.3 — where does the decimal point go? (a) 0.0096 (b) 9.6 (c) 0.96 (d) 0.096
  10. 10.5.7 × 24 — where does the decimal point go? (a) 1368 (b) 13.68 (c) 136.8 (d) 1.368
  11. 11.3.1 × 6 — where does the decimal point go? (a) 18.6 (b) 186 (c) 1.86 (d) 0.186
  12. 12.5.1 × 8 — where does the decimal point go? (a) 0.408 (b) 4.08 (c) 408 (d) 40.8
  13. 13.0.41 × 3.8 — where does the decimal point go? (a) 1.558 (b) 15.58 (c) 0.1558 (d) 0.01558
  14. 14.0.28 × 0.7 — where does the decimal point go? (a) 0.00196 (b) 0.0196 (c) 0.196 (d) 1.96
  15. 15.4.8 × 3.4 — where does the decimal point go? (a) 0.1632 (b) 1.632 (c) 163.2 (d) 16.32
  16. 16.1.6 × 6 — where does the decimal point go? (a) 96 (b) 0.096 (c) 0.96 (d) 9.6
  17. 17.4.8 × 4.6 — where does the decimal point go? (a) 0.2208 (b) 22.08 (c) 2.208 (d) 220.8
  18. 18.7.2 × 0.3 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 0.0216 (d) 21.6
  19. 19.6.2 × 0.9 — where does the decimal point go? (a) 0.0558 (b) 0.558 (c) 5.58 (d) 55.8
  20. 20.0.32 × 8 — where does the decimal point go? (a) 25.6 (b) 2.56 (c) 0.256 (d) 0.0256
  21. 21.3.4 × 39 — where does the decimal point go? (a) 1326 (b) 1.326 (c) 132.6 (d) 13.26
  22. 22.5.4 × 0.2 — where does the decimal point go? (a) 10.8 (b) 0.108 (c) 1.08 (d) 0.0108
  23. 23.0.69 × 0.4 — where does the decimal point go? (a) 0.276 (b) 0.0276 (c) 2.76 (d) 0.00276
  24. 24.5.7 × 35 — where does the decimal point go? (a) 1.995 (b) 199.5 (c) 19.95 (d) 1995
  25. 25.0.36 × 0.6 — where does the decimal point go? (a) 0.0216 (b) 0.216 (c) 2.16 (d) 0.00216
  26. 26.0.21 × 6 — where does the decimal point go? (a) 0.0126 (b) 12.6 (c) 0.126 (d) 1.26
  27. 27.7.3 × 5 — where does the decimal point go? (a) 0.365 (b) 365 (c) 3.65 (d) 36.5
  28. 28.0.14 × 48 — where does the decimal point go? (a) 0.672 (b) 0.0672 (c) 6.72 (d) 67.2
  29. 29.0.43 × 0.6 — where does the decimal point go? (a) 0.00258 (b) 0.258 (c) 0.0258 (d) 2.58
  30. 30.0.62 × 8 — where does the decimal point go? (a) 0.0496 (b) 0.496 (c) 4.96 (d) 49.6
  31. 31.2.1 × 2.2 — where does the decimal point go? (a) 46.2 (b) 0.0462 (c) 0.462 (d) 4.62
  32. 32.0.33 × 9 — where does the decimal point go? (a) 2.97 (b) 0.297 (c) 29.7 (d) 0.0297
  33. 33.3.6 × 0.3 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 1.08 (d) 10.8
  34. 34.0.51 × 7 — where does the decimal point go? (a) 3.57 (b) 0.0357 (c) 35.7 (d) 0.357
  35. 35.3.6 × 2.8 — where does the decimal point go? (a) 1.008 (b) 0.1008 (c) 10.08 (d) 100.8
  36. 36.9.8 × 3.6 — where does the decimal point go? (a) 0.3528 (b) 352.8 (c) 35.28 (d) 3.528
  37. 37.0.44 × 12 — where does the decimal point go? (a) 52.8 (b) 5.28 (c) 0.0528 (d) 0.528
  38. 38.5.5 × 2.5 — where does the decimal point go? (a) 137.5 (b) 1.375 (c) 13.75 (d) 0.1375
  39. 39.0.27 × 7 — where does the decimal point go? (a) 0.189 (b) 0.0189 (c) 1.89 (d) 18.9
  40. 40.9.9 × 7 — where does the decimal point go? (a) 69.3 (b) 693 (c) 6.93 (d) 0.693

Answer key

  1. 12.88
  2. 6.46
  3. 18.3
  4. 79.2
  5. 2.16
  6. 1.189
  7. 25.8
  8. 2.52
  9. 0.96
  10. 136.8
  11. 18.6
  12. 40.8
  13. 1.558
  14. 0.196
  15. 16.32
  16. 9.6
  17. 22.08
  18. 2.16
  19. 5.58
  20. 2.56
  21. 132.6
  22. 1.08
  23. 0.276
  24. 199.5
  25. 0.216
  26. 1.26
  27. 36.5
  28. 6.72
  29. 0.258
  30. 4.96
  31. 4.62
  32. 2.97
  33. 1.08
  34. 3.57
  35. 10.08
  36. 35.28
  37. 5.28
  38. 13.75
  39. 1.89
  40. 69.3

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