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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 505 · 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. 1.8.8 × 3 — where does the decimal point go? (a) 264 (b) 0.264 (c) 26.4 (d) 2.64
  2. 2.0.58 × 4 — where does the decimal point go? (a) 23.2 (b) 2.32 (c) 0.232 (d) 0.0232
  3. 3.0.38 × 0.6 — where does the decimal point go? (a) 0.0228 (b) 2.28 (c) 0.228 (d) 0.00228
  4. 4.5.8 × 0.9 — where does the decimal point go? (a) 0.0522 (b) 52.2 (c) 5.22 (d) 0.522
  5. 5.7.9 × 0.7 — where does the decimal point go? (a) 55.3 (b) 0.0553 (c) 0.553 (d) 5.53
  6. 6.0.68 × 4 — where does the decimal point go? (a) 2.72 (b) 0.272 (c) 0.0272 (d) 27.2
  7. 7.8.1 × 1.4 — where does the decimal point go? (a) 113.4 (b) 1.134 (c) 0.1134 (d) 11.34
  8. 8.0.63 × 23 — where does the decimal point go? (a) 144.9 (b) 1.449 (c) 0.1449 (d) 14.49
  9. 9.0.87 × 2.4 — where does the decimal point go? (a) 0.02088 (b) 20.88 (c) 2.088 (d) 0.2088
  10. 10.0.64 × 23 — where does the decimal point go? (a) 1.472 (b) 14.72 (c) 147.2 (d) 0.1472
  11. 11.0.82 × 0.4 — where does the decimal point go? (a) 0.00328 (b) 0.328 (c) 3.28 (d) 0.0328
  12. 12.0.81 × 26 — where does the decimal point go? (a) 0.2106 (b) 2.106 (c) 21.06 (d) 210.6
  13. 13.3.4 × 6 — where does the decimal point go? (a) 2.04 (b) 0.204 (c) 20.4 (d) 204
  14. 14.1.3 × 49 — where does the decimal point go? (a) 6.37 (b) 637 (c) 63.7 (d) 0.637
  15. 15.0.69 × 1.7 — where does the decimal point go? (a) 11.73 (b) 0.1173 (c) 1.173 (d) 0.01173
  16. 16.7.4 × 3 — where does the decimal point go? (a) 0.222 (b) 222 (c) 22.2 (d) 2.22
  17. 17.0.93 × 0.2 — where does the decimal point go? (a) 0.0186 (b) 0.186 (c) 1.86 (d) 0.00186
  18. 18.0.28 × 39 — where does the decimal point go? (a) 10.92 (b) 109.2 (c) 0.1092 (d) 1.092
  19. 19.2.8 × 0.3 — where does the decimal point go? (a) 0.84 (b) 8.4 (c) 0.0084 (d) 0.084
  20. 20.0.74 × 0.2 — where does the decimal point go? (a) 0.00148 (b) 1.48 (c) 0.148 (d) 0.0148
  21. 21.0.75 × 1.1 — where does the decimal point go? (a) 0.825 (b) 8.25 (c) 0.00825 (d) 0.0825
  22. 22.9.3 × 21 — where does the decimal point go? (a) 1953 (b) 195.3 (c) 19.53 (d) 1.953
  23. 23.0.12 × 0.2 — where does the decimal point go? (a) 0.024 (b) 0.0024 (c) 0.00024 (d) 0.24
  24. 24.7.2 × 0.4 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 0.0288 (d) 28.8
  25. 25.4.1 × 4.4 — where does the decimal point go? (a) 18.04 (b) 1.804 (c) 180.4 (d) 0.1804
  26. 26.7.3 × 1.7 — where does the decimal point go? (a) 124.1 (b) 12.41 (c) 1.241 (d) 0.1241
  27. 27.3.1 × 0.5 — where does the decimal point go? (a) 15.5 (b) 0.0155 (c) 1.55 (d) 0.155
  28. 28.3.6 × 12 — where does the decimal point go? (a) 43.2 (b) 4.32 (c) 0.432 (d) 432
  29. 29.8.2 × 6 — where does the decimal point go? (a) 492 (b) 49.2 (c) 0.492 (d) 4.92
  30. 30.0.48 × 6 — where does the decimal point go? (a) 2.88 (b) 28.8 (c) 0.0288 (d) 0.288
  31. 31.3.2 × 37 — where does the decimal point go? (a) 11.84 (b) 1184 (c) 1.184 (d) 118.4
  32. 32.4.5 × 5 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 22.5 (d) 225
  33. 33.6.5 × 23 — where does the decimal point go? (a) 1.495 (b) 1495 (c) 149.5 (d) 14.95
  34. 34.3.1 × 44 — where does the decimal point go? (a) 136.4 (b) 1364 (c) 1.364 (d) 13.64
  35. 35.6.8 × 7 — where does the decimal point go? (a) 476 (b) 0.476 (c) 4.76 (d) 47.6
  36. 36.0.89 × 4.3 — where does the decimal point go? (a) 3.827 (b) 0.03827 (c) 0.3827 (d) 38.27
  37. 37.0.99 × 29 — where does the decimal point go? (a) 2.871 (b) 287.1 (c) 28.71 (d) 0.2871
  38. 38.1.5 × 4.3 — where does the decimal point go? (a) 0.0645 (b) 0.645 (c) 64.5 (d) 6.45
  39. 39.0.37 × 22 — where does the decimal point go? (a) 8.14 (b) 0.0814 (c) 0.814 (d) 81.4
  40. 40.9.5 × 7 — where does the decimal point go? (a) 0.665 (b) 6.65 (c) 66.5 (d) 665

Answer key

  1. 26.4
  2. 2.32
  3. 0.228
  4. 5.22
  5. 5.53
  6. 2.72
  7. 11.34
  8. 14.49
  9. 2.088
  10. 14.72
  11. 0.328
  12. 21.06
  13. 20.4
  14. 63.7
  15. 1.173
  16. 22.2
  17. 0.186
  18. 10.92
  19. 0.84
  20. 0.148
  21. 0.825
  22. 195.3
  23. 0.024
  24. 2.88
  25. 18.04
  26. 12.41
  27. 1.55
  28. 43.2
  29. 49.2
  30. 2.88
  31. 118.4
  32. 22.5
  33. 149.5
  34. 136.4
  35. 47.6
  36. 3.827
  37. 28.71
  38. 6.45
  39. 8.14
  40. 66.5

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