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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 365 · 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. 1.0.89 × 0.7 — where does the decimal point go? (a) 0.00623 (b) 0.623 (c) 0.0623 (d) 6.23
  2. 2.0.25 × 5 — where does the decimal point go? (a) 12.5 (b) 0.0125 (c) 0.125 (d) 1.25
  3. 3.0.96 × 0.8 — where does the decimal point go? (a) 0.768 (b) 0.00768 (c) 0.0768 (d) 7.68
  4. 4.6.9 × 24 — where does the decimal point go? (a) 165.6 (b) 16.56 (c) 1656 (d) 1.656
  5. 5.2.3 × 5 — where does the decimal point go? (a) 0.115 (b) 11.5 (c) 1.15 (d) 115
  6. 6.7.9 × 0.8 — where does the decimal point go? (a) 6.32 (b) 0.0632 (c) 63.2 (d) 0.632
  7. 7.0.99 × 2 — where does the decimal point go? (a) 1.98 (b) 0.0198 (c) 19.8 (d) 0.198
  8. 8.1.8 × 0.7 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 0.126 (d) 0.0126
  9. 9.5.1 × 6 — where does the decimal point go? (a) 3.06 (b) 0.306 (c) 30.6 (d) 306
  10. 10.9.1 × 6 — where does the decimal point go? (a) 54.6 (b) 0.546 (c) 546 (d) 5.46
  11. 11.0.66 × 1.6 — where does the decimal point go? (a) 1.056 (b) 0.1056 (c) 0.01056 (d) 10.56
  12. 12.9.1 × 9 — where does the decimal point go? (a) 81.9 (b) 0.819 (c) 8.19 (d) 819
  13. 13.0.22 × 2 — where does the decimal point go? (a) 0.0044 (b) 0.044 (c) 0.44 (d) 4.4
  14. 14.0.96 × 0.6 — where does the decimal point go? (a) 5.76 (b) 0.00576 (c) 0.0576 (d) 0.576
  15. 15.8.3 × 1.6 — where does the decimal point go? (a) 13.28 (b) 132.8 (c) 0.1328 (d) 1.328
  16. 16.0.29 × 0.5 — where does the decimal point go? (a) 0.00145 (b) 1.45 (c) 0.0145 (d) 0.145
  17. 17.0.23 × 12 — where does the decimal point go? (a) 2.76 (b) 27.6 (c) 0.276 (d) 0.0276
  18. 18.3.1 × 0.2 — where does the decimal point go? (a) 6.2 (b) 0.62 (c) 0.062 (d) 0.0062
  19. 19.9.2 × 6 — where does the decimal point go? (a) 5.52 (b) 0.552 (c) 552 (d) 55.2
  20. 20.0.43 × 8 — where does the decimal point go? (a) 0.344 (b) 0.0344 (c) 34.4 (d) 3.44
  21. 21.5.6 × 1.3 — where does the decimal point go? (a) 0.0728 (b) 72.8 (c) 0.728 (d) 7.28
  22. 22.0.23 × 1.4 — where does the decimal point go? (a) 0.0322 (b) 3.22 (c) 0.322 (d) 0.00322
  23. 23.6.4 × 28 — where does the decimal point go? (a) 17.92 (b) 1792 (c) 179.2 (d) 1.792
  24. 24.9.1 × 21 — where does the decimal point go? (a) 19.11 (b) 191.1 (c) 1911 (d) 1.911
  25. 25.3.8 × 36 — where does the decimal point go? (a) 1.368 (b) 136.8 (c) 1368 (d) 13.68
  26. 26.0.33 × 6 — where does the decimal point go? (a) 19.8 (b) 0.198 (c) 0.0198 (d) 1.98
  27. 27.4.5 × 3 — where does the decimal point go? (a) 13.5 (b) 135 (c) 1.35 (d) 0.135
  28. 28.0.24 × 43 — where does the decimal point go? (a) 10.32 (b) 0.1032 (c) 1.032 (d) 103.2
  29. 29.0.17 × 2.1 — where does the decimal point go? (a) 0.00357 (b) 0.0357 (c) 0.357 (d) 3.57
  30. 30.8.4 × 2 — where does the decimal point go? (a) 1.68 (b) 168 (c) 16.8 (d) 0.168
  31. 31.5.7 × 3.3 — where does the decimal point go? (a) 188.1 (b) 18.81 (c) 1.881 (d) 0.1881
  32. 32.0.64 × 4 — where does the decimal point go? (a) 2.56 (b) 25.6 (c) 0.0256 (d) 0.256
  33. 33.3.4 × 0.4 — where does the decimal point go? (a) 1.36 (b) 0.136 (c) 0.0136 (d) 13.6
  34. 34.6.1 × 1.6 — where does the decimal point go? (a) 97.6 (b) 0.0976 (c) 9.76 (d) 0.976
  35. 35.3.6 × 0.9 — where does the decimal point go? (a) 0.0324 (b) 0.324 (c) 3.24 (d) 32.4
  36. 36.1.7 × 3.8 — where does the decimal point go? (a) 0.646 (b) 6.46 (c) 0.0646 (d) 64.6
  37. 37.9.6 × 3 — where does the decimal point go? (a) 2.88 (b) 288 (c) 0.288 (d) 28.8
  38. 38.1.5 × 5 — where does the decimal point go? (a) 0.075 (b) 7.5 (c) 75 (d) 0.75
  39. 39.0.89 × 0.5 — where does the decimal point go? (a) 0.00445 (b) 4.45 (c) 0.0445 (d) 0.445
  40. 40.0.64 × 9 — where does the decimal point go? (a) 0.576 (b) 5.76 (c) 0.0576 (d) 57.6

Answer key

  1. 0.623
  2. 1.25
  3. 0.768
  4. 165.6
  5. 11.5
  6. 6.32
  7. 1.98
  8. 1.26
  9. 30.6
  10. 54.6
  11. 1.056
  12. 81.9
  13. 0.44
  14. 0.576
  15. 13.28
  16. 0.145
  17. 2.76
  18. 0.62
  19. 55.2
  20. 3.44
  21. 7.28
  22. 0.322
  23. 179.2
  24. 191.1
  25. 136.8
  26. 1.98
  27. 13.5
  28. 10.32
  29. 0.357
  30. 16.8
  31. 18.81
  32. 2.56
  33. 1.36
  34. 9.76
  35. 3.24
  36. 6.46
  37. 28.8
  38. 7.5
  39. 0.445
  40. 5.76

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