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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 485 · 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. 1.6.3 × 0.9 — where does the decimal point go? (a) 0.0567 (b) 56.7 (c) 0.567 (d) 5.67
  2. 2.0.69 × 6 — where does the decimal point go? (a) 0.0414 (b) 41.4 (c) 4.14 (d) 0.414
  3. 3.0.78 × 1.6 — where does the decimal point go? (a) 1.248 (b) 0.01248 (c) 0.1248 (d) 12.48
  4. 4.4.7 × 8 — where does the decimal point go? (a) 3.76 (b) 0.376 (c) 37.6 (d) 376
  5. 5.2.1 × 0.4 — where does the decimal point go? (a) 0.84 (b) 0.084 (c) 0.0084 (d) 8.4
  6. 6.3.3 × 5 — where does the decimal point go? (a) 16.5 (b) 0.165 (c) 1.65 (d) 165
  7. 7.5.3 × 2.2 — where does the decimal point go? (a) 0.1166 (b) 11.66 (c) 116.6 (d) 1.166
  8. 8.3.4 × 0.4 — where does the decimal point go? (a) 0.136 (b) 13.6 (c) 1.36 (d) 0.0136
  9. 9.7.8 × 24 — where does the decimal point go? (a) 18.72 (b) 187.2 (c) 1.872 (d) 1872
  10. 10.0.23 × 1.2 — where does the decimal point go? (a) 0.276 (b) 0.00276 (c) 0.0276 (d) 2.76
  11. 11.0.39 × 4 — where does the decimal point go? (a) 0.0156 (b) 1.56 (c) 15.6 (d) 0.156
  12. 12.0.56 × 29 — where does the decimal point go? (a) 162.4 (b) 16.24 (c) 0.1624 (d) 1.624
  13. 13.0.86 × 29 — where does the decimal point go? (a) 249.4 (b) 2.494 (c) 0.2494 (d) 24.94
  14. 14.0.87 × 35 — where does the decimal point go? (a) 3.045 (b) 30.45 (c) 304.5 (d) 0.3045
  15. 15.3.1 × 7 — where does the decimal point go? (a) 2.17 (b) 217 (c) 21.7 (d) 0.217
  16. 16.9.8 × 17 — where does the decimal point go? (a) 1666 (b) 166.6 (c) 16.66 (d) 1.666
  17. 17.7.9 × 4.9 — where does the decimal point go? (a) 0.3871 (b) 387.1 (c) 3.871 (d) 38.71
  18. 18.3.1 × 2.6 — where does the decimal point go? (a) 0.806 (b) 80.6 (c) 0.0806 (d) 8.06
  19. 19.0.39 × 9 — where does the decimal point go? (a) 35.1 (b) 3.51 (c) 0.0351 (d) 0.351
  20. 20.1.8 × 12 — where does the decimal point go? (a) 0.216 (b) 21.6 (c) 2.16 (d) 216
  21. 21.5.9 × 29 — where does the decimal point go? (a) 171.1 (b) 1711 (c) 17.11 (d) 1.711
  22. 22.0.94 × 27 — where does the decimal point go? (a) 0.2538 (b) 25.38 (c) 2.538 (d) 253.8
  23. 23.0.27 × 37 — where does the decimal point go? (a) 0.0999 (b) 0.999 (c) 99.9 (d) 9.99
  24. 24.6.3 × 4.1 — where does the decimal point go? (a) 258.3 (b) 2.583 (c) 0.2583 (d) 25.83
  25. 25.0.24 × 0.2 — where does the decimal point go? (a) 0.048 (b) 0.0048 (c) 0.00048 (d) 0.48
  26. 26.0.13 × 4.7 — where does the decimal point go? (a) 0.0611 (b) 6.11 (c) 0.611 (d) 0.00611
  27. 27.0.64 × 46 — where does the decimal point go? (a) 29.44 (b) 2.944 (c) 0.2944 (d) 294.4
  28. 28.8.7 × 34 — where does the decimal point go? (a) 29.58 (b) 2958 (c) 2.958 (d) 295.8
  29. 29.6.6 × 2 — where does the decimal point go? (a) 132 (b) 13.2 (c) 0.132 (d) 1.32
  30. 30.0.12 × 2.4 — where does the decimal point go? (a) 0.0288 (b) 0.288 (c) 2.88 (d) 0.00288
  31. 31.0.17 × 27 — where does the decimal point go? (a) 4.59 (b) 0.459 (c) 45.9 (d) 0.0459
  32. 32.4.2 × 1.3 — where does the decimal point go? (a) 0.546 (b) 54.6 (c) 0.0546 (d) 5.46
  33. 33.0.23 × 5 — where does the decimal point go? (a) 0.115 (b) 1.15 (c) 0.0115 (d) 11.5
  34. 34.0.87 × 8 — where does the decimal point go? (a) 6.96 (b) 0.696 (c) 69.6 (d) 0.0696
  35. 35.0.33 × 0.7 — where does the decimal point go? (a) 0.00231 (b) 0.0231 (c) 0.231 (d) 2.31
  36. 36.0.33 × 1.5 — where does the decimal point go? (a) 4.95 (b) 0.00495 (c) 0.495 (d) 0.0495
  37. 37.5.5 × 0.5 — where does the decimal point go? (a) 2.75 (b) 0.0275 (c) 27.5 (d) 0.275
  38. 38.1.4 × 0.4 — where does the decimal point go? (a) 0.56 (b) 0.0056 (c) 5.6 (d) 0.056
  39. 39.3.4 × 36 — where does the decimal point go? (a) 122.4 (b) 12.24 (c) 1224 (d) 1.224
  40. 40.0.53 × 8 — where does the decimal point go? (a) 0.424 (b) 0.0424 (c) 42.4 (d) 4.24

Answer key

  1. 5.67
  2. 4.14
  3. 1.248
  4. 37.6
  5. 0.84
  6. 16.5
  7. 11.66
  8. 1.36
  9. 187.2
  10. 0.276
  11. 1.56
  12. 16.24
  13. 24.94
  14. 30.45
  15. 21.7
  16. 166.6
  17. 38.71
  18. 8.06
  19. 3.51
  20. 21.6
  21. 171.1
  22. 25.38
  23. 9.99
  24. 25.83
  25. 0.048
  26. 0.611
  27. 29.44
  28. 295.8
  29. 13.2
  30. 0.288
  31. 4.59
  32. 5.46
  33. 1.15
  34. 6.96
  35. 0.231
  36. 0.495
  37. 2.75
  38. 0.56
  39. 122.4
  40. 4.24

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