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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 682 · 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. 1.0.36 × 0.3 — where does the decimal point go? (a) 1.08 (b) 0.0108 (c) 0.00108 (d) 0.108
  2. 2.1.2 × 8 — where does the decimal point go? (a) 9.6 (b) 0.96 (c) 0.096 (d) 96
  3. 3.5.3 × 3.2 — where does the decimal point go? (a) 1.696 (b) 16.96 (c) 169.6 (d) 0.1696
  4. 4.0.17 × 19 — where does the decimal point go? (a) 0.0323 (b) 32.3 (c) 0.323 (d) 3.23
  5. 5.9.4 × 18 — where does the decimal point go? (a) 1.692 (b) 16.92 (c) 169.2 (d) 1692
  6. 6.0.99 × 0.8 — where does the decimal point go? (a) 7.92 (b) 0.0792 (c) 0.00792 (d) 0.792
  7. 7.0.78 × 0.3 — where does the decimal point go? (a) 2.34 (b) 0.234 (c) 0.0234 (d) 0.00234
  8. 8.0.14 × 0.7 — where does the decimal point go? (a) 0.00098 (b) 0.0098 (c) 0.98 (d) 0.098
  9. 9.0.68 × 0.3 — where does the decimal point go? (a) 2.04 (b) 0.204 (c) 0.0204 (d) 0.00204
  10. 10.2.6 × 1.1 — where does the decimal point go? (a) 28.6 (b) 0.286 (c) 2.86 (d) 0.0286
  11. 11.3.2 × 26 — where does the decimal point go? (a) 83.2 (b) 8.32 (c) 0.832 (d) 832
  12. 12.0.29 × 2 — where does the decimal point go? (a) 5.8 (b) 0.58 (c) 0.058 (d) 0.0058
  13. 13.5.7 × 9 — where does the decimal point go? (a) 5.13 (b) 51.3 (c) 0.513 (d) 513
  14. 14.2.7 × 38 — where does the decimal point go? (a) 1026 (b) 10.26 (c) 1.026 (d) 102.6
  15. 15.0.92 × 6 — where does the decimal point go? (a) 5.52 (b) 0.552 (c) 55.2 (d) 0.0552
  16. 16.0.16 × 33 — where does the decimal point go? (a) 0.528 (b) 52.8 (c) 0.0528 (d) 5.28
  17. 17.3.2 × 6 — where does the decimal point go? (a) 19.2 (b) 1.92 (c) 0.192 (d) 192
  18. 18.4.1 × 41 — where does the decimal point go? (a) 16.81 (b) 168.1 (c) 1.681 (d) 1681
  19. 19.1.9 × 3 — where does the decimal point go? (a) 0.057 (b) 0.57 (c) 57 (d) 5.7
  20. 20.9.3 × 3 — where does the decimal point go? (a) 0.279 (b) 27.9 (c) 279 (d) 2.79
  21. 21.0.95 × 0.7 — where does the decimal point go? (a) 0.665 (b) 6.65 (c) 0.00665 (d) 0.0665
  22. 22.0.88 × 0.7 — where does the decimal point go? (a) 0.00616 (b) 6.16 (c) 0.616 (d) 0.0616
  23. 23.9.3 × 4 — where does the decimal point go? (a) 3.72 (b) 0.372 (c) 37.2 (d) 372
  24. 24.7.2 × 9 — where does the decimal point go? (a) 64.8 (b) 6.48 (c) 0.648 (d) 648
  25. 25.4.5 × 11 — where does the decimal point go? (a) 4.95 (b) 49.5 (c) 495 (d) 0.495
  26. 26.0.41 × 8 — where does the decimal point go? (a) 0.0328 (b) 0.328 (c) 32.8 (d) 3.28
  27. 27.8.3 × 0.4 — where does the decimal point go? (a) 0.332 (b) 33.2 (c) 3.32 (d) 0.0332
  28. 28.5.1 × 49 — where does the decimal point go? (a) 249.9 (b) 24.99 (c) 2.499 (d) 2499
  29. 29.0.93 × 36 — where does the decimal point go? (a) 0.3348 (b) 334.8 (c) 3.348 (d) 33.48
  30. 30.9.8 × 1.4 — where does the decimal point go? (a) 0.1372 (b) 137.2 (c) 13.72 (d) 1.372
  31. 31.8.2 × 1.8 — where does the decimal point go? (a) 14.76 (b) 147.6 (c) 1.476 (d) 0.1476
  32. 32.2.3 × 8 — where does the decimal point go? (a) 0.184 (b) 18.4 (c) 1.84 (d) 184
  33. 33.6.6 × 4.6 — where does the decimal point go? (a) 30.36 (b) 0.3036 (c) 3.036 (d) 303.6
  34. 34.6.9 × 4 — where does the decimal point go? (a) 2.76 (b) 276 (c) 27.6 (d) 0.276
  35. 35.0.39 × 0.2 — where does the decimal point go? (a) 0.078 (b) 0.00078 (c) 0.78 (d) 0.0078
  36. 36.3.7 × 3.3 — where does the decimal point go? (a) 122.1 (b) 1.221 (c) 12.21 (d) 0.1221
  37. 37.0.12 × 0.3 — where does the decimal point go? (a) 0.036 (b) 0.00036 (c) 0.0036 (d) 0.36
  38. 38.3.1 × 21 — where does the decimal point go? (a) 0.651 (b) 65.1 (c) 651 (d) 6.51
  39. 39.0.38 × 8 — where does the decimal point go? (a) 3.04 (b) 0.304 (c) 30.4 (d) 0.0304
  40. 40.2.5 × 3.1 — where does the decimal point go? (a) 7.75 (b) 0.0775 (c) 0.775 (d) 77.5

Answer key

  1. 0.108
  2. 9.6
  3. 16.96
  4. 3.23
  5. 169.2
  6. 0.792
  7. 0.234
  8. 0.098
  9. 0.204
  10. 2.86
  11. 83.2
  12. 0.58
  13. 51.3
  14. 102.6
  15. 5.52
  16. 5.28
  17. 19.2
  18. 168.1
  19. 5.7
  20. 27.9
  21. 0.665
  22. 0.616
  23. 37.2
  24. 64.8
  25. 49.5
  26. 3.28
  27. 3.32
  28. 249.9
  29. 33.48
  30. 13.72
  31. 14.76
  32. 18.4
  33. 30.36
  34. 27.6
  35. 0.078
  36. 12.21
  37. 0.036
  38. 65.1
  39. 3.04
  40. 7.75

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