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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 612 · 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. 1.6.6 × 2 — where does the decimal point go? (a) 1.32 (b) 132 (c) 13.2 (d) 0.132
  2. 2.0.84 × 28 — where does the decimal point go? (a) 23.52 (b) 235.2 (c) 2.352 (d) 0.2352
  3. 3.2.3 × 0.4 — where does the decimal point go? (a) 0.92 (b) 9.2 (c) 0.092 (d) 0.0092
  4. 4.6.6 × 0.7 — where does the decimal point go? (a) 0.0462 (b) 0.462 (c) 4.62 (d) 46.2
  5. 5.0.39 × 0.9 — where does the decimal point go? (a) 3.51 (b) 0.0351 (c) 0.00351 (d) 0.351
  6. 6.0.28 × 31 — where does the decimal point go? (a) 0.0868 (b) 0.868 (c) 8.68 (d) 86.8
  7. 7.0.83 × 0.6 — where does the decimal point go? (a) 0.0498 (b) 4.98 (c) 0.00498 (d) 0.498
  8. 8.0.23 × 2.8 — where does the decimal point go? (a) 0.00644 (b) 0.644 (c) 6.44 (d) 0.0644
  9. 9.9.9 × 7 — where does the decimal point go? (a) 69.3 (b) 0.693 (c) 6.93 (d) 693
  10. 10.0.99 × 9 — where does the decimal point go? (a) 8.91 (b) 89.1 (c) 0.891 (d) 0.0891
  11. 11.0.56 × 7 — where does the decimal point go? (a) 0.392 (b) 0.0392 (c) 3.92 (d) 39.2
  12. 12.0.31 × 0.2 — where does the decimal point go? (a) 0.062 (b) 0.00062 (c) 0.62 (d) 0.0062
  13. 13.0.16 × 4.1 — where does the decimal point go? (a) 0.656 (b) 0.00656 (c) 0.0656 (d) 6.56
  14. 14.0.76 × 0.4 — where does the decimal point go? (a) 0.0304 (b) 0.00304 (c) 3.04 (d) 0.304
  15. 15.2.7 × 0.3 — where does the decimal point go? (a) 0.81 (b) 0.081 (c) 8.1 (d) 0.0081
  16. 16.6.3 × 3 — where does the decimal point go? (a) 1.89 (b) 18.9 (c) 189 (d) 0.189
  17. 17.6.7 × 0.7 — where does the decimal point go? (a) 46.9 (b) 0.469 (c) 0.0469 (d) 4.69
  18. 18.0.34 × 8 — where does the decimal point go? (a) 0.0272 (b) 2.72 (c) 0.272 (d) 27.2
  19. 19.5.3 × 42 — where does the decimal point go? (a) 2.226 (b) 22.26 (c) 2226 (d) 222.6
  20. 20.1.4 × 2 — where does the decimal point go? (a) 2.8 (b) 0.028 (c) 0.28 (d) 28
  21. 21.0.43 × 27 — where does the decimal point go? (a) 0.1161 (b) 11.61 (c) 1.161 (d) 116.1
  22. 22.0.34 × 4 — where does the decimal point go? (a) 0.0136 (b) 13.6 (c) 0.136 (d) 1.36
  23. 23.5.1 × 4.1 — where does the decimal point go? (a) 209.1 (b) 0.2091 (c) 2.091 (d) 20.91
  24. 24.2.1 × 2.9 — where does the decimal point go? (a) 0.609 (b) 60.9 (c) 0.0609 (d) 6.09
  25. 25.0.84 × 0.8 — where does the decimal point go? (a) 0.00672 (b) 0.672 (c) 0.0672 (d) 6.72
  26. 26.0.36 × 0.9 — where does the decimal point go? (a) 3.24 (b) 0.0324 (c) 0.324 (d) 0.00324
  27. 27.7.8 × 0.8 — where does the decimal point go? (a) 0.624 (b) 0.0624 (c) 62.4 (d) 6.24
  28. 28.1.8 × 0.8 — where does the decimal point go? (a) 0.144 (b) 1.44 (c) 14.4 (d) 0.0144
  29. 29.0.47 × 0.2 — where does the decimal point go? (a) 0.094 (b) 0.0094 (c) 0.00094 (d) 0.94
  30. 30.0.14 × 6 — where does the decimal point go? (a) 0.084 (b) 8.4 (c) 0.0084 (d) 0.84
  31. 31.0.84 × 13 — where does the decimal point go? (a) 109.2 (b) 1.092 (c) 0.1092 (d) 10.92
  32. 32.8.7 × 11 — where does the decimal point go? (a) 9.57 (b) 0.957 (c) 95.7 (d) 957
  33. 33.0.27 × 11 — where does the decimal point go? (a) 0.297 (b) 0.0297 (c) 29.7 (d) 2.97
  34. 34.0.38 × 29 — where does the decimal point go? (a) 0.1102 (b) 1.102 (c) 110.2 (d) 11.02
  35. 35.0.89 × 3.7 — where does the decimal point go? (a) 32.93 (b) 0.3293 (c) 0.03293 (d) 3.293
  36. 36.8.1 × 0.3 — where does the decimal point go? (a) 2.43 (b) 0.243 (c) 0.0243 (d) 24.3
  37. 37.2.8 × 48 — where does the decimal point go? (a) 13.44 (b) 134.4 (c) 1344 (d) 1.344
  38. 38.0.32 × 0.3 — where does the decimal point go? (a) 0.096 (b) 0.96 (c) 0.00096 (d) 0.0096
  39. 39.0.27 × 7 — where does the decimal point go? (a) 0.0189 (b) 18.9 (c) 1.89 (d) 0.189
  40. 40.0.62 × 0.9 — where does the decimal point go? (a) 0.00558 (b) 5.58 (c) 0.558 (d) 0.0558

Answer key

  1. 13.2
  2. 23.52
  3. 0.92
  4. 4.62
  5. 0.351
  6. 8.68
  7. 0.498
  8. 0.644
  9. 69.3
  10. 8.91
  11. 3.92
  12. 0.062
  13. 0.656
  14. 0.304
  15. 0.81
  16. 18.9
  17. 4.69
  18. 2.72
  19. 222.6
  20. 2.8
  21. 11.61
  22. 1.36
  23. 20.91
  24. 6.09
  25. 0.672
  26. 0.324
  27. 6.24
  28. 1.44
  29. 0.094
  30. 0.84
  31. 10.92
  32. 95.7
  33. 2.97
  34. 11.02
  35. 3.293
  36. 2.43
  37. 134.4
  38. 0.096
  39. 1.89
  40. 0.558

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