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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 971 · 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. 1.0.79 × 9 — where does the decimal point go? (a) 7.11 (b) 0.0711 (c) 71.1 (d) 0.711
  2. 2.0.57 × 5 — where does the decimal point go? (a) 0.0285 (b) 0.285 (c) 28.5 (d) 2.85
  3. 3.0.26 × 4.8 — where does the decimal point go? (a) 12.48 (b) 0.1248 (c) 0.01248 (d) 1.248
  4. 4.0.74 × 0.8 — where does the decimal point go? (a) 0.0592 (b) 0.00592 (c) 5.92 (d) 0.592
  5. 5.0.84 × 2.7 — where does the decimal point go? (a) 0.2268 (b) 22.68 (c) 0.02268 (d) 2.268
  6. 6.1.8 × 0.9 — where does the decimal point go? (a) 0.0162 (b) 1.62 (c) 0.162 (d) 16.2
  7. 7.0.84 × 4.2 — where does the decimal point go? (a) 35.28 (b) 0.03528 (c) 0.3528 (d) 3.528
  8. 8.7.3 × 2.2 — where does the decimal point go? (a) 0.1606 (b) 160.6 (c) 1.606 (d) 16.06
  9. 9.0.21 × 11 — where does the decimal point go? (a) 2.31 (b) 0.0231 (c) 0.231 (d) 23.1
  10. 10.7.2 × 4.4 — where does the decimal point go? (a) 31.68 (b) 0.3168 (c) 316.8 (d) 3.168
  11. 11.0.65 × 23 — where does the decimal point go? (a) 0.1495 (b) 149.5 (c) 1.495 (d) 14.95
  12. 12.0.13 × 11 — where does the decimal point go? (a) 0.0143 (b) 0.143 (c) 14.3 (d) 1.43
  13. 13.0.31 × 17 — where does the decimal point go? (a) 0.527 (b) 5.27 (c) 0.0527 (d) 52.7
  14. 14.0.33 × 0.9 — where does the decimal point go? (a) 0.0297 (b) 0.00297 (c) 2.97 (d) 0.297
  15. 15.4.1 × 5 — where does the decimal point go? (a) 205 (b) 20.5 (c) 2.05 (d) 0.205
  16. 16.4.2 × 1.7 — where does the decimal point go? (a) 7.14 (b) 0.0714 (c) 0.714 (d) 71.4
  17. 17.2.7 × 0.2 — where does the decimal point go? (a) 0.54 (b) 0.0054 (c) 5.4 (d) 0.054
  18. 18.0.42 × 0.8 — where does the decimal point go? (a) 0.00336 (b) 0.0336 (c) 3.36 (d) 0.336
  19. 19.6.5 × 29 — where does the decimal point go? (a) 18.85 (b) 188.5 (c) 1.885 (d) 1885
  20. 20.0.33 × 3 — where does the decimal point go? (a) 0.0099 (b) 0.099 (c) 9.9 (d) 0.99
  21. 21.1.9 × 6 — where does the decimal point go? (a) 114 (b) 1.14 (c) 11.4 (d) 0.114
  22. 22.0.46 × 38 — where does the decimal point go? (a) 0.1748 (b) 174.8 (c) 1.748 (d) 17.48
  23. 23.0.49 × 0.5 — where does the decimal point go? (a) 0.245 (b) 0.00245 (c) 2.45 (d) 0.0245
  24. 24.0.71 × 4 — where does the decimal point go? (a) 2.84 (b) 0.0284 (c) 28.4 (d) 0.284
  25. 25.0.99 × 5 — where does the decimal point go? (a) 0.0495 (b) 0.495 (c) 49.5 (d) 4.95
  26. 26.0.89 × 0.5 — where does the decimal point go? (a) 0.00445 (b) 0.445 (c) 4.45 (d) 0.0445
  27. 27.3.2 × 33 — where does the decimal point go? (a) 1056 (b) 1.056 (c) 10.56 (d) 105.6
  28. 28.8.4 × 3 — where does the decimal point go? (a) 2.52 (b) 25.2 (c) 0.252 (d) 252
  29. 29.9.2 × 1.1 — where does the decimal point go? (a) 1.012 (b) 0.1012 (c) 101.2 (d) 10.12
  30. 30.0.37 × 8 — where does the decimal point go? (a) 2.96 (b) 29.6 (c) 0.0296 (d) 0.296
  31. 31.2.2 × 41 — where does the decimal point go? (a) 9.02 (b) 0.902 (c) 90.2 (d) 902
  32. 32.0.96 × 19 — where does the decimal point go? (a) 0.1824 (b) 182.4 (c) 1.824 (d) 18.24
  33. 33.1.8 × 4 — where does the decimal point go? (a) 0.72 (b) 72 (c) 7.2 (d) 0.072
  34. 34.0.62 × 2.6 — where does the decimal point go? (a) 1.612 (b) 16.12 (c) 0.1612 (d) 0.01612
  35. 35.3.1 × 0.9 — where does the decimal point go? (a) 27.9 (b) 0.0279 (c) 0.279 (d) 2.79
  36. 36.2.1 × 2 — where does the decimal point go? (a) 0.042 (b) 42 (c) 4.2 (d) 0.42
  37. 37.0.27 × 0.4 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 0.00108 (d) 1.08
  38. 38.0.58 × 4 — where does the decimal point go? (a) 2.32 (b) 23.2 (c) 0.0232 (d) 0.232
  39. 39.2.3 × 0.9 — where does the decimal point go? (a) 20.7 (b) 2.07 (c) 0.0207 (d) 0.207
  40. 40.4.3 × 22 — where does the decimal point go? (a) 9.46 (b) 94.6 (c) 0.946 (d) 946

Answer key

  1. 7.11
  2. 2.85
  3. 1.248
  4. 0.592
  5. 2.268
  6. 1.62
  7. 3.528
  8. 16.06
  9. 2.31
  10. 31.68
  11. 14.95
  12. 1.43
  13. 5.27
  14. 0.297
  15. 20.5
  16. 7.14
  17. 0.54
  18. 0.336
  19. 188.5
  20. 0.99
  21. 11.4
  22. 17.48
  23. 0.245
  24. 2.84
  25. 4.95
  26. 0.445
  27. 105.6
  28. 25.2
  29. 10.12
  30. 2.96
  31. 90.2
  32. 18.24
  33. 7.2
  34. 1.612
  35. 2.79
  36. 4.2
  37. 0.108
  38. 2.32
  39. 2.07
  40. 94.6

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