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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 197 · 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. 1.9.2 × 3.9 — where does the decimal point go? (a) 0.3588 (b) 35.88 (c) 3.588 (d) 358.8
  2. 2.3.1 × 45 — where does the decimal point go? (a) 139.5 (b) 1395 (c) 13.95 (d) 1.395
  3. 3.1.4 × 2 — where does the decimal point go? (a) 2.8 (b) 0.28 (c) 0.028 (d) 28
  4. 4.2.3 × 4 — where does the decimal point go? (a) 0.92 (b) 9.2 (c) 92 (d) 0.092
  5. 5.0.83 × 7 — where does the decimal point go? (a) 5.81 (b) 0.0581 (c) 58.1 (d) 0.581
  6. 6.2.2 × 32 — where does the decimal point go? (a) 7.04 (b) 0.704 (c) 704 (d) 70.4
  7. 7.8.4 × 0.9 — where does the decimal point go? (a) 0.0756 (b) 0.756 (c) 75.6 (d) 7.56
  8. 8.5.6 × 3.7 — where does the decimal point go? (a) 20.72 (b) 2.072 (c) 207.2 (d) 0.2072
  9. 9.1.4 × 1.9 — where does the decimal point go? (a) 26.6 (b) 0.0266 (c) 0.266 (d) 2.66
  10. 10.9.6 × 3.2 — where does the decimal point go? (a) 30.72 (b) 3.072 (c) 0.3072 (d) 307.2
  11. 11.0.88 × 14 — where does the decimal point go? (a) 1.232 (b) 123.2 (c) 0.1232 (d) 12.32
  12. 12.0.99 × 0.7 — where does the decimal point go? (a) 0.0693 (b) 0.693 (c) 6.93 (d) 0.00693
  13. 13.9.3 × 2.3 — where does the decimal point go? (a) 0.2139 (b) 2.139 (c) 21.39 (d) 213.9
  14. 14.0.36 × 0.2 — where does the decimal point go? (a) 0.00072 (b) 0.072 (c) 0.0072 (d) 0.72
  15. 15.0.62 × 49 — where does the decimal point go? (a) 0.3038 (b) 303.8 (c) 30.38 (d) 3.038
  16. 16.0.53 × 0.9 — where does the decimal point go? (a) 0.0477 (b) 0.00477 (c) 0.477 (d) 4.77
  17. 17.3.5 × 4.3 — where does the decimal point go? (a) 150.5 (b) 1.505 (c) 0.1505 (d) 15.05
  18. 18.0.89 × 13 — where does the decimal point go? (a) 11.57 (b) 1.157 (c) 0.1157 (d) 115.7
  19. 19.1.8 × 3 — where does the decimal point go? (a) 0.054 (b) 54 (c) 5.4 (d) 0.54
  20. 20.0.41 × 46 — where does the decimal point go? (a) 18.86 (b) 188.6 (c) 0.1886 (d) 1.886
  21. 21.8.6 × 8 — where does the decimal point go? (a) 68.8 (b) 0.688 (c) 6.88 (d) 688
  22. 22.8.7 × 2 — where does the decimal point go? (a) 0.174 (b) 17.4 (c) 174 (d) 1.74
  23. 23.0.58 × 0.4 — where does the decimal point go? (a) 0.0232 (b) 0.232 (c) 2.32 (d) 0.00232
  24. 24.0.44 × 3 — where does the decimal point go? (a) 13.2 (b) 1.32 (c) 0.132 (d) 0.0132
  25. 25.7.1 × 1.3 — where does the decimal point go? (a) 9.23 (b) 0.923 (c) 92.3 (d) 0.0923
  26. 26.0.27 × 12 — where does the decimal point go? (a) 0.0324 (b) 3.24 (c) 32.4 (d) 0.324
  27. 27.2.3 × 34 — where does the decimal point go? (a) 7.82 (b) 782 (c) 78.2 (d) 0.782
  28. 28.1.7 × 5 — where does the decimal point go? (a) 0.85 (b) 0.085 (c) 85 (d) 8.5
  29. 29.0.45 × 3.3 — where does the decimal point go? (a) 0.01485 (b) 1.485 (c) 14.85 (d) 0.1485
  30. 30.0.44 × 0.2 — where does the decimal point go? (a) 0.0088 (b) 0.00088 (c) 0.88 (d) 0.088
  31. 31.3.4 × 0.4 — where does the decimal point go? (a) 0.136 (b) 1.36 (c) 0.0136 (d) 13.6
  32. 32.7.7 × 7 — where does the decimal point go? (a) 5.39 (b) 539 (c) 53.9 (d) 0.539
  33. 33.0.96 × 38 — where does the decimal point go? (a) 0.3648 (b) 364.8 (c) 36.48 (d) 3.648
  34. 34.5.1 × 5 — where does the decimal point go? (a) 25.5 (b) 0.255 (c) 255 (d) 2.55
  35. 35.0.94 × 11 — where does the decimal point go? (a) 103.4 (b) 10.34 (c) 0.1034 (d) 1.034
  36. 36.0.39 × 2.2 — where does the decimal point go? (a) 0.858 (b) 8.58 (c) 0.00858 (d) 0.0858
  37. 37.9.6 × 4.3 — where does the decimal point go? (a) 4.128 (b) 412.8 (c) 0.4128 (d) 41.28
  38. 38.5.7 × 1.7 — where does the decimal point go? (a) 0.0969 (b) 0.969 (c) 9.69 (d) 96.9
  39. 39.0.39 × 23 — where does the decimal point go? (a) 0.0897 (b) 8.97 (c) 0.897 (d) 89.7
  40. 40.0.34 × 6 — where does the decimal point go? (a) 0.0204 (b) 0.204 (c) 20.4 (d) 2.04

Answer key

  1. 35.88
  2. 139.5
  3. 2.8
  4. 9.2
  5. 5.81
  6. 70.4
  7. 7.56
  8. 20.72
  9. 2.66
  10. 30.72
  11. 12.32
  12. 0.693
  13. 21.39
  14. 0.072
  15. 30.38
  16. 0.477
  17. 15.05
  18. 11.57
  19. 5.4
  20. 18.86
  21. 68.8
  22. 17.4
  23. 0.232
  24. 1.32
  25. 9.23
  26. 3.24
  27. 78.2
  28. 8.5
  29. 1.485
  30. 0.088
  31. 1.36
  32. 53.9
  33. 36.48
  34. 25.5
  35. 10.34
  36. 0.858
  37. 41.28
  38. 9.69
  39. 8.97
  40. 2.04

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