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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 155 · 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. 1.4.8 × 0.9 — where does the decimal point go? (a) 4.32 (b) 0.0432 (c) 0.432 (d) 43.2
  2. 2.0.41 × 35 — where does the decimal point go? (a) 0.1435 (b) 14.35 (c) 1.435 (d) 143.5
  3. 3.5.8 × 48 — where does the decimal point go? (a) 27.84 (b) 278.4 (c) 2.784 (d) 2784
  4. 4.8.7 × 15 — where does the decimal point go? (a) 130.5 (b) 13.05 (c) 1305 (d) 1.305
  5. 5.0.66 × 27 — where does the decimal point go? (a) 17.82 (b) 1.782 (c) 0.1782 (d) 178.2
  6. 6.7.5 × 0.7 — where does the decimal point go? (a) 5.25 (b) 52.5 (c) 0.525 (d) 0.0525
  7. 7.9.9 × 2 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 198 (d) 19.8
  8. 8.0.33 × 34 — where does the decimal point go? (a) 1.122 (b) 112.2 (c) 0.1122 (d) 11.22
  9. 9.0.29 × 2.2 — where does the decimal point go? (a) 0.0638 (b) 0.00638 (c) 0.638 (d) 6.38
  10. 10.0.41 × 14 — where does the decimal point go? (a) 5.74 (b) 0.0574 (c) 57.4 (d) 0.574
  11. 11.0.76 × 1.8 — where does the decimal point go? (a) 0.1368 (b) 13.68 (c) 0.01368 (d) 1.368
  12. 12.5.2 × 0.3 — where does the decimal point go? (a) 1.56 (b) 0.0156 (c) 15.6 (d) 0.156
  13. 13.8.2 × 2 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 16.4 (d) 164
  14. 14.0.81 × 0.2 — where does the decimal point go? (a) 0.0162 (b) 0.00162 (c) 1.62 (d) 0.162
  15. 15.7.6 × 8 — where does the decimal point go? (a) 0.608 (b) 60.8 (c) 608 (d) 6.08
  16. 16.0.89 × 3 — where does the decimal point go? (a) 26.7 (b) 0.0267 (c) 0.267 (d) 2.67
  17. 17.0.69 × 7 — where does the decimal point go? (a) 48.3 (b) 0.483 (c) 4.83 (d) 0.0483
  18. 18.8.9 × 0.5 — where does the decimal point go? (a) 44.5 (b) 0.445 (c) 4.45 (d) 0.0445
  19. 19.6.8 × 9 — where does the decimal point go? (a) 6.12 (b) 61.2 (c) 0.612 (d) 612
  20. 20.0.91 × 0.8 — where does the decimal point go? (a) 0.00728 (b) 7.28 (c) 0.0728 (d) 0.728
  21. 21.8.9 × 0.8 — where does the decimal point go? (a) 0.0712 (b) 7.12 (c) 71.2 (d) 0.712
  22. 22.5.7 × 5 — where does the decimal point go? (a) 285 (b) 2.85 (c) 28.5 (d) 0.285
  23. 23.0.98 × 3.9 — where does the decimal point go? (a) 0.03822 (b) 0.3822 (c) 38.22 (d) 3.822
  24. 24.0.51 × 5 — where does the decimal point go? (a) 0.0255 (b) 0.255 (c) 2.55 (d) 25.5
  25. 25.6.4 × 4 — where does the decimal point go? (a) 2.56 (b) 256 (c) 25.6 (d) 0.256
  26. 26.1.3 × 0.6 — where does the decimal point go? (a) 0.0078 (b) 0.78 (c) 0.078 (d) 7.8
  27. 27.0.89 × 0.8 — where does the decimal point go? (a) 0.712 (b) 0.0712 (c) 0.00712 (d) 7.12
  28. 28.0.88 × 34 — where does the decimal point go? (a) 0.2992 (b) 29.92 (c) 299.2 (d) 2.992
  29. 29.2.3 × 38 — where does the decimal point go? (a) 87.4 (b) 8.74 (c) 0.874 (d) 874
  30. 30.0.15 × 11 — where does the decimal point go? (a) 0.165 (b) 1.65 (c) 16.5 (d) 0.0165
  31. 31.6.9 × 3 — where does the decimal point go? (a) 20.7 (b) 0.207 (c) 2.07 (d) 207
  32. 32.2.3 × 0.5 — where does the decimal point go? (a) 1.15 (b) 11.5 (c) 0.115 (d) 0.0115
  33. 33.9.5 × 7 — where does the decimal point go? (a) 665 (b) 6.65 (c) 66.5 (d) 0.665
  34. 34.4.6 × 0.4 — where does the decimal point go? (a) 1.84 (b) 0.0184 (c) 0.184 (d) 18.4
  35. 35.6.2 × 0.4 — where does the decimal point go? (a) 0.248 (b) 0.0248 (c) 2.48 (d) 24.8
  36. 36.0.75 × 7 — where does the decimal point go? (a) 0.525 (b) 5.25 (c) 52.5 (d) 0.0525
  37. 37.0.49 × 5 — where does the decimal point go? (a) 0.0245 (b) 2.45 (c) 0.245 (d) 24.5
  38. 38.5.4 × 2.3 — where does the decimal point go? (a) 0.1242 (b) 1.242 (c) 124.2 (d) 12.42
  39. 39.0.39 × 0.2 — where does the decimal point go? (a) 0.0078 (b) 0.00078 (c) 0.78 (d) 0.078
  40. 40.7.4 × 2.3 — where does the decimal point go? (a) 170.2 (b) 1.702 (c) 0.1702 (d) 17.02

Answer key

  1. 4.32
  2. 14.35
  3. 278.4
  4. 130.5
  5. 17.82
  6. 5.25
  7. 19.8
  8. 11.22
  9. 0.638
  10. 5.74
  11. 1.368
  12. 1.56
  13. 16.4
  14. 0.162
  15. 60.8
  16. 2.67
  17. 4.83
  18. 4.45
  19. 61.2
  20. 0.728
  21. 7.12
  22. 28.5
  23. 3.822
  24. 2.55
  25. 25.6
  26. 0.78
  27. 0.712
  28. 29.92
  29. 87.4
  30. 1.65
  31. 20.7
  32. 1.15
  33. 66.5
  34. 1.84
  35. 2.48
  36. 5.25
  37. 2.45
  38. 12.42
  39. 0.078
  40. 17.02

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