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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 699 · 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. 1.8.7 × 1.5 — where does the decimal point go? (a) 0.1305 (b) 1.305 (c) 130.5 (d) 13.05
  2. 2.2.9 × 9 — where does the decimal point go? (a) 2.61 (b) 0.261 (c) 261 (d) 26.1
  3. 3.5.1 × 43 — where does the decimal point go? (a) 2.193 (b) 219.3 (c) 2193 (d) 21.93
  4. 4.6.1 × 0.6 — where does the decimal point go? (a) 3.66 (b) 0.0366 (c) 0.366 (d) 36.6
  5. 5.0.33 × 3.5 — where does the decimal point go? (a) 11.55 (b) 0.01155 (c) 1.155 (d) 0.1155
  6. 6.1.4 × 18 — where does the decimal point go? (a) 25.2 (b) 0.252 (c) 2.52 (d) 252
  7. 7.0.87 × 4 — where does the decimal point go? (a) 3.48 (b) 0.348 (c) 34.8 (d) 0.0348
  8. 8.5.5 × 0.7 — where does the decimal point go? (a) 0.385 (b) 0.0385 (c) 38.5 (d) 3.85
  9. 9.2.6 × 14 — where does the decimal point go? (a) 36.4 (b) 3.64 (c) 364 (d) 0.364
  10. 10.6.9 × 6 — where does the decimal point go? (a) 4.14 (b) 414 (c) 0.414 (d) 41.4
  11. 11.8.1 × 0.2 — where does the decimal point go? (a) 16.2 (b) 0.162 (c) 0.0162 (d) 1.62
  12. 12.0.13 × 8 — where does the decimal point go? (a) 1.04 (b) 10.4 (c) 0.0104 (d) 0.104
  13. 13.1.2 × 2 — where does the decimal point go? (a) 0.24 (b) 0.024 (c) 2.4 (d) 24
  14. 14.2.2 × 0.3 — where does the decimal point go? (a) 0.66 (b) 0.066 (c) 6.6 (d) 0.0066
  15. 15.6.1 × 44 — where does the decimal point go? (a) 268.4 (b) 26.84 (c) 2684 (d) 2.684
  16. 16.3.7 × 3 — where does the decimal point go? (a) 11.1 (b) 0.111 (c) 1.11 (d) 111
  17. 17.3.4 × 2 — where does the decimal point go? (a) 68 (b) 6.8 (c) 0.068 (d) 0.68
  18. 18.0.65 × 9 — where does the decimal point go? (a) 0.585 (b) 5.85 (c) 58.5 (d) 0.0585
  19. 19.5.3 × 0.5 — where does the decimal point go? (a) 2.65 (b) 0.265 (c) 26.5 (d) 0.0265
  20. 20.0.35 × 3.7 — where does the decimal point go? (a) 1.295 (b) 0.1295 (c) 12.95 (d) 0.01295
  21. 21.0.84 × 8 — where does the decimal point go? (a) 0.672 (b) 6.72 (c) 67.2 (d) 0.0672
  22. 22.0.75 × 2.1 — where does the decimal point go? (a) 0.1575 (b) 15.75 (c) 0.01575 (d) 1.575
  23. 23.0.87 × 1.1 — where does the decimal point go? (a) 9.57 (b) 0.957 (c) 0.0957 (d) 0.00957
  24. 24.1.4 × 0.2 — where does the decimal point go? (a) 2.8 (b) 0.0028 (c) 0.028 (d) 0.28
  25. 25.0.91 × 4.1 — where does the decimal point go? (a) 0.03731 (b) 0.3731 (c) 37.31 (d) 3.731
  26. 26.6.8 × 0.8 — where does the decimal point go? (a) 54.4 (b) 0.0544 (c) 5.44 (d) 0.544
  27. 27.3.8 × 0.8 — where does the decimal point go? (a) 3.04 (b) 0.304 (c) 0.0304 (d) 30.4
  28. 28.5.1 × 16 — where does the decimal point go? (a) 8.16 (b) 81.6 (c) 816 (d) 0.816
  29. 29.0.87 × 3 — where does the decimal point go? (a) 0.0261 (b) 0.261 (c) 2.61 (d) 26.1
  30. 30.0.98 × 4.7 — where does the decimal point go? (a) 4.606 (b) 0.4606 (c) 46.06 (d) 0.04606
  31. 31.0.26 × 0.9 — where does the decimal point go? (a) 2.34 (b) 0.234 (c) 0.00234 (d) 0.0234
  32. 32.0.51 × 15 — where does the decimal point go? (a) 7.65 (b) 0.765 (c) 76.5 (d) 0.0765
  33. 33.0.66 × 0.4 — where does the decimal point go? (a) 2.64 (b) 0.0264 (c) 0.00264 (d) 0.264
  34. 34.1.9 × 4.8 — where does the decimal point go? (a) 9.12 (b) 91.2 (c) 0.912 (d) 0.0912
  35. 35.8.2 × 2.2 — where does the decimal point go? (a) 1.804 (b) 180.4 (c) 18.04 (d) 0.1804
  36. 36.0.29 × 36 — where does the decimal point go? (a) 10.44 (b) 104.4 (c) 1.044 (d) 0.1044
  37. 37.2.5 × 3.7 — where does the decimal point go? (a) 92.5 (b) 9.25 (c) 0.0925 (d) 0.925
  38. 38.0.56 × 1.3 — where does the decimal point go? (a) 0.728 (b) 7.28 (c) 0.00728 (d) 0.0728
  39. 39.5.3 × 3.5 — where does the decimal point go? (a) 185.5 (b) 0.1855 (c) 1.855 (d) 18.55
  40. 40.9.1 × 3.5 — where does the decimal point go? (a) 318.5 (b) 3.185 (c) 31.85 (d) 0.3185

Answer key

  1. 13.05
  2. 26.1
  3. 219.3
  4. 3.66
  5. 1.155
  6. 25.2
  7. 3.48
  8. 3.85
  9. 36.4
  10. 41.4
  11. 1.62
  12. 1.04
  13. 2.4
  14. 0.66
  15. 268.4
  16. 11.1
  17. 6.8
  18. 5.85
  19. 2.65
  20. 1.295
  21. 6.72
  22. 1.575
  23. 0.957
  24. 0.28
  25. 3.731
  26. 5.44
  27. 3.04
  28. 81.6
  29. 2.61
  30. 4.606
  31. 0.234
  32. 7.65
  33. 0.264
  34. 9.12
  35. 18.04
  36. 10.44
  37. 9.25
  38. 0.728
  39. 18.55
  40. 31.85

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