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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 835 · 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. 1.0.26 × 0.4 — where does the decimal point go? (a) 0.0104 (b) 0.104 (c) 1.04 (d) 0.00104
  2. 2.0.26 × 23 — where does the decimal point go? (a) 0.598 (b) 59.8 (c) 5.98 (d) 0.0598
  3. 3.6.5 × 3 — where does the decimal point go? (a) 0.195 (b) 195 (c) 1.95 (d) 19.5
  4. 4.0.43 × 7 — where does the decimal point go? (a) 0.301 (b) 0.0301 (c) 3.01 (d) 30.1
  5. 5.8.1 × 6 — where does the decimal point go? (a) 48.6 (b) 486 (c) 0.486 (d) 4.86
  6. 6.5.9 × 2.2 — where does the decimal point go? (a) 0.1298 (b) 12.98 (c) 1.298 (d) 129.8
  7. 7.0.25 × 3 — where does the decimal point go? (a) 7.5 (b) 0.75 (c) 0.075 (d) 0.0075
  8. 8.3.3 × 45 — where does the decimal point go? (a) 148.5 (b) 1485 (c) 1.485 (d) 14.85
  9. 9.0.68 × 7 — where does the decimal point go? (a) 0.476 (b) 4.76 (c) 0.0476 (d) 47.6
  10. 10.3.8 × 48 — where does the decimal point go? (a) 1824 (b) 18.24 (c) 182.4 (d) 1.824
  11. 11.0.82 × 0.4 — where does the decimal point go? (a) 0.328 (b) 0.0328 (c) 0.00328 (d) 3.28
  12. 12.0.47 × 44 — where does the decimal point go? (a) 2.068 (b) 20.68 (c) 0.2068 (d) 206.8
  13. 13.0.54 × 2.1 — where does the decimal point go? (a) 1.134 (b) 11.34 (c) 0.01134 (d) 0.1134
  14. 14.3.1 × 0.7 — where does the decimal point go? (a) 0.0217 (b) 0.217 (c) 2.17 (d) 21.7
  15. 15.2.3 × 0.3 — where does the decimal point go? (a) 0.0069 (b) 0.069 (c) 6.9 (d) 0.69
  16. 16.0.93 × 2 — where does the decimal point go? (a) 0.0186 (b) 0.186 (c) 1.86 (d) 18.6
  17. 17.7.4 × 19 — where does the decimal point go? (a) 14.06 (b) 140.6 (c) 1.406 (d) 1406
  18. 18.0.51 × 31 — where does the decimal point go? (a) 158.1 (b) 0.1581 (c) 15.81 (d) 1.581
  19. 19.6.2 × 3 — where does the decimal point go? (a) 18.6 (b) 1.86 (c) 186 (d) 0.186
  20. 20.0.96 × 2.8 — where does the decimal point go? (a) 2.688 (b) 26.88 (c) 0.2688 (d) 0.02688
  21. 21.8.1 × 11 — where does the decimal point go? (a) 89.1 (b) 0.891 (c) 891 (d) 8.91
  22. 22.8.5 × 0.5 — where does the decimal point go? (a) 4.25 (b) 0.425 (c) 0.0425 (d) 42.5
  23. 23.1.5 × 0.3 — where does the decimal point go? (a) 4.5 (b) 0.45 (c) 0.0045 (d) 0.045
  24. 24.2.9 × 4 — where does the decimal point go? (a) 1.16 (b) 116 (c) 11.6 (d) 0.116
  25. 25.5.8 × 0.6 — where does the decimal point go? (a) 0.348 (b) 3.48 (c) 34.8 (d) 0.0348
  26. 26.7.2 × 32 — where does the decimal point go? (a) 2.304 (b) 230.4 (c) 2304 (d) 23.04
  27. 27.0.23 × 27 — where does the decimal point go? (a) 62.1 (b) 0.0621 (c) 6.21 (d) 0.621
  28. 28.0.69 × 0.7 — where does the decimal point go? (a) 0.483 (b) 4.83 (c) 0.00483 (d) 0.0483
  29. 29.9.9 × 6 — where does the decimal point go? (a) 5.94 (b) 59.4 (c) 594 (d) 0.594
  30. 30.9.1 × 0.7 — where does the decimal point go? (a) 0.637 (b) 6.37 (c) 0.0637 (d) 63.7
  31. 31.6.8 × 11 — where does the decimal point go? (a) 748 (b) 0.748 (c) 7.48 (d) 74.8
  32. 32.0.61 × 3.5 — where does the decimal point go? (a) 21.35 (b) 2.135 (c) 0.02135 (d) 0.2135
  33. 33.0.77 × 2.2 — where does the decimal point go? (a) 16.94 (b) 0.01694 (c) 1.694 (d) 0.1694
  34. 34.2.2 × 0.9 — where does the decimal point go? (a) 0.0198 (b) 0.198 (c) 1.98 (d) 19.8
  35. 35.8.9 × 2 — where does the decimal point go? (a) 178 (b) 0.178 (c) 17.8 (d) 1.78
  36. 36.5.8 × 1.7 — where does the decimal point go? (a) 9.86 (b) 0.0986 (c) 98.6 (d) 0.986
  37. 37.0.59 × 34 — where does the decimal point go? (a) 20.06 (b) 2.006 (c) 200.6 (d) 0.2006
  38. 38.7.7 × 0.3 — where does the decimal point go? (a) 0.231 (b) 23.1 (c) 0.0231 (d) 2.31
  39. 39.1.4 × 0.4 — where does the decimal point go? (a) 0.56 (b) 0.0056 (c) 0.056 (d) 5.6
  40. 40.6.7 × 1.8 — where does the decimal point go? (a) 12.06 (b) 0.1206 (c) 1.206 (d) 120.6

Answer key

  1. 0.104
  2. 5.98
  3. 19.5
  4. 3.01
  5. 48.6
  6. 12.98
  7. 0.75
  8. 148.5
  9. 4.76
  10. 182.4
  11. 0.328
  12. 20.68
  13. 1.134
  14. 2.17
  15. 0.69
  16. 1.86
  17. 140.6
  18. 15.81
  19. 18.6
  20. 2.688
  21. 89.1
  22. 4.25
  23. 0.45
  24. 11.6
  25. 3.48
  26. 230.4
  27. 6.21
  28. 0.483
  29. 59.4
  30. 6.37
  31. 74.8
  32. 2.135
  33. 1.694
  34. 1.98
  35. 17.8
  36. 9.86
  37. 20.06
  38. 2.31
  39. 0.56
  40. 12.06

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