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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 31 · 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. 1.2.8 × 2.8 — where does the decimal point go? (a) 7.84 (b) 0.0784 (c) 0.784 (d) 78.4
  2. 2.4.4 × 12 — where does the decimal point go? (a) 0.528 (b) 5.28 (c) 52.8 (d) 528
  3. 3.5.9 × 0.8 — where does the decimal point go? (a) 0.0472 (b) 4.72 (c) 47.2 (d) 0.472
  4. 4.0.58 × 23 — where does the decimal point go? (a) 1.334 (b) 133.4 (c) 13.34 (d) 0.1334
  5. 5.0.12 × 21 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 0.0252 (d) 25.2
  6. 6.5.2 × 0.9 — where does the decimal point go? (a) 46.8 (b) 0.468 (c) 4.68 (d) 0.0468
  7. 7.7.9 × 0.9 — where does the decimal point go? (a) 0.0711 (b) 0.711 (c) 71.1 (d) 7.11
  8. 8.0.47 × 19 — where does the decimal point go? (a) 0.0893 (b) 0.893 (c) 8.93 (d) 89.3
  9. 9.2.6 × 3.6 — where does the decimal point go? (a) 0.936 (b) 0.0936 (c) 93.6 (d) 9.36
  10. 10.0.72 × 3.3 — where does the decimal point go? (a) 0.2376 (b) 2.376 (c) 23.76 (d) 0.02376
  11. 11.0.32 × 36 — where does the decimal point go? (a) 11.52 (b) 1.152 (c) 0.1152 (d) 115.2
  12. 12.3.3 × 0.4 — where does the decimal point go? (a) 0.132 (b) 1.32 (c) 0.0132 (d) 13.2
  13. 13.0.58 × 8 — where does the decimal point go? (a) 0.0464 (b) 46.4 (c) 4.64 (d) 0.464
  14. 14.2.7 × 0.4 — where does the decimal point go? (a) 0.108 (b) 0.0108 (c) 10.8 (d) 1.08
  15. 15.9.7 × 6 — where does the decimal point go? (a) 58.2 (b) 5.82 (c) 0.582 (d) 582
  16. 16.0.73 × 4 — where does the decimal point go? (a) 0.0292 (b) 0.292 (c) 29.2 (d) 2.92
  17. 17.6.1 × 0.7 — where does the decimal point go? (a) 42.7 (b) 0.0427 (c) 0.427 (d) 4.27
  18. 18.0.87 × 0.9 — where does the decimal point go? (a) 0.00783 (b) 0.0783 (c) 0.783 (d) 7.83
  19. 19.0.34 × 0.6 — where does the decimal point go? (a) 2.04 (b) 0.0204 (c) 0.204 (d) 0.00204
  20. 20.5.1 × 31 — where does the decimal point go? (a) 15.81 (b) 158.1 (c) 1581 (d) 1.581
  21. 21.0.27 × 0.9 — where does the decimal point go? (a) 0.0243 (b) 0.243 (c) 2.43 (d) 0.00243
  22. 22.0.69 × 0.5 — where does the decimal point go? (a) 0.00345 (b) 3.45 (c) 0.345 (d) 0.0345
  23. 23.0.29 × 6 — where does the decimal point go? (a) 0.174 (b) 1.74 (c) 17.4 (d) 0.0174
  24. 24.0.87 × 3.5 — where does the decimal point go? (a) 30.45 (b) 3.045 (c) 0.03045 (d) 0.3045
  25. 25.0.89 × 9 — where does the decimal point go? (a) 80.1 (b) 0.0801 (c) 8.01 (d) 0.801
  26. 26.6.1 × 8 — where does the decimal point go? (a) 4.88 (b) 0.488 (c) 48.8 (d) 488
  27. 27.0.64 × 0.6 — where does the decimal point go? (a) 0.00384 (b) 0.384 (c) 3.84 (d) 0.0384
  28. 28.0.51 × 3.8 — where does the decimal point go? (a) 0.1938 (b) 0.01938 (c) 1.938 (d) 19.38
  29. 29.0.13 × 21 — where does the decimal point go? (a) 27.3 (b) 0.0273 (c) 2.73 (d) 0.273
  30. 30.0.74 × 2.6 — where does the decimal point go? (a) 0.01924 (b) 0.1924 (c) 19.24 (d) 1.924
  31. 31.0.51 × 6 — where does the decimal point go? (a) 3.06 (b) 0.0306 (c) 30.6 (d) 0.306
  32. 32.5.1 × 15 — where does the decimal point go? (a) 0.765 (b) 76.5 (c) 7.65 (d) 765
  33. 33.0.18 × 36 — where does the decimal point go? (a) 0.648 (b) 6.48 (c) 0.0648 (d) 64.8
  34. 34.0.39 × 3 — where does the decimal point go? (a) 11.7 (b) 0.0117 (c) 1.17 (d) 0.117
  35. 35.2.1 × 8 — where does the decimal point go? (a) 168 (b) 0.168 (c) 1.68 (d) 16.8
  36. 36.6.6 × 11 — where does the decimal point go? (a) 726 (b) 0.726 (c) 7.26 (d) 72.6
  37. 37.3.6 × 2.1 — where does the decimal point go? (a) 75.6 (b) 0.756 (c) 0.0756 (d) 7.56
  38. 38.7.7 × 2 — where does the decimal point go? (a) 1.54 (b) 15.4 (c) 154 (d) 0.154
  39. 39.3.3 × 4.8 — where does the decimal point go? (a) 0.1584 (b) 15.84 (c) 1.584 (d) 158.4
  40. 40.6.2 × 0.9 — where does the decimal point go? (a) 5.58 (b) 0.0558 (c) 0.558 (d) 55.8

Answer key

  1. 7.84
  2. 52.8
  3. 4.72
  4. 13.34
  5. 2.52
  6. 4.68
  7. 7.11
  8. 8.93
  9. 9.36
  10. 2.376
  11. 11.52
  12. 1.32
  13. 4.64
  14. 1.08
  15. 58.2
  16. 2.92
  17. 4.27
  18. 0.783
  19. 0.204
  20. 158.1
  21. 0.243
  22. 0.345
  23. 1.74
  24. 3.045
  25. 8.01
  26. 48.8
  27. 0.384
  28. 1.938
  29. 2.73
  30. 1.924
  31. 3.06
  32. 76.5
  33. 6.48
  34. 1.17
  35. 16.8
  36. 72.6
  37. 7.56
  38. 15.4
  39. 15.84
  40. 5.58

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