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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 742 · 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. 1.7.3 × 5 — where does the decimal point go? (a) 3.65 (b) 36.5 (c) 0.365 (d) 365
  2. 2.0.62 × 0.9 — where does the decimal point go? (a) 5.58 (b) 0.0558 (c) 0.00558 (d) 0.558
  3. 3.9.6 × 7 — where does the decimal point go? (a) 67.2 (b) 6.72 (c) 0.672 (d) 672
  4. 4.0.83 × 4.3 — where does the decimal point go? (a) 3.569 (b) 35.69 (c) 0.3569 (d) 0.03569
  5. 5.0.77 × 3.4 — where does the decimal point go? (a) 0.2618 (b) 26.18 (c) 2.618 (d) 0.02618
  6. 6.0.91 × 2 — where does the decimal point go? (a) 18.2 (b) 1.82 (c) 0.0182 (d) 0.182
  7. 7.4.1 × 2 — where does the decimal point go? (a) 0.82 (b) 8.2 (c) 0.082 (d) 82
  8. 8.7.8 × 2.7 — where does the decimal point go? (a) 21.06 (b) 210.6 (c) 0.2106 (d) 2.106
  9. 9.0.76 × 3 — where does the decimal point go? (a) 0.228 (b) 22.8 (c) 2.28 (d) 0.0228
  10. 10.0.58 × 4 — where does the decimal point go? (a) 23.2 (b) 0.232 (c) 0.0232 (d) 2.32
  11. 11.0.81 × 3 — where does the decimal point go? (a) 0.243 (b) 24.3 (c) 0.0243 (d) 2.43
  12. 12.2.2 × 2 — where does the decimal point go? (a) 0.044 (b) 4.4 (c) 0.44 (d) 44
  13. 13.0.94 × 8 — where does the decimal point go? (a) 75.2 (b) 0.0752 (c) 0.752 (d) 7.52
  14. 14.0.39 × 0.6 — where does the decimal point go? (a) 0.00234 (b) 0.234 (c) 0.0234 (d) 2.34
  15. 15.6.2 × 4 — where does the decimal point go? (a) 24.8 (b) 248 (c) 2.48 (d) 0.248
  16. 16.0.56 × 2.6 — where does the decimal point go? (a) 0.1456 (b) 0.01456 (c) 1.456 (d) 14.56
  17. 17.1.2 × 6 — where does the decimal point go? (a) 0.72 (b) 72 (c) 0.072 (d) 7.2
  18. 18.3.6 × 17 — where does the decimal point go? (a) 0.612 (b) 61.2 (c) 6.12 (d) 612
  19. 19.9.5 × 5 — where does the decimal point go? (a) 0.475 (b) 4.75 (c) 475 (d) 47.5
  20. 20.0.62 × 8 — where does the decimal point go? (a) 49.6 (b) 0.0496 (c) 4.96 (d) 0.496
  21. 21.2.4 × 31 — where does the decimal point go? (a) 0.744 (b) 74.4 (c) 744 (d) 7.44
  22. 22.1.9 × 5 — where does the decimal point go? (a) 0.95 (b) 0.095 (c) 9.5 (d) 95
  23. 23.7.9 × 5 — where does the decimal point go? (a) 39.5 (b) 395 (c) 3.95 (d) 0.395
  24. 24.5.6 × 4.4 — where does the decimal point go? (a) 0.2464 (b) 246.4 (c) 24.64 (d) 2.464
  25. 25.9.9 × 2 — where does the decimal point go? (a) 198 (b) 0.198 (c) 19.8 (d) 1.98
  26. 26.0.72 × 9 — where does the decimal point go? (a) 0.0648 (b) 64.8 (c) 6.48 (d) 0.648
  27. 27.2.7 × 7 — where does the decimal point go? (a) 189 (b) 18.9 (c) 0.189 (d) 1.89
  28. 28.0.19 × 4.2 — where does the decimal point go? (a) 0.798 (b) 7.98 (c) 0.0798 (d) 0.00798
  29. 29.2.9 × 2.3 — where does the decimal point go? (a) 0.0667 (b) 66.7 (c) 0.667 (d) 6.67
  30. 30.0.81 × 0.4 — where does the decimal point go? (a) 0.00324 (b) 0.0324 (c) 0.324 (d) 3.24
  31. 31.0.14 × 8 — where does the decimal point go? (a) 1.12 (b) 0.112 (c) 0.0112 (d) 11.2
  32. 32.0.79 × 4.8 — where does the decimal point go? (a) 0.03792 (b) 3.792 (c) 37.92 (d) 0.3792
  33. 33.4.8 × 2 — where does the decimal point go? (a) 0.096 (b) 0.96 (c) 96 (d) 9.6
  34. 34.5.2 × 3 — where does the decimal point go? (a) 156 (b) 0.156 (c) 1.56 (d) 15.6
  35. 35.5.7 × 6 — where does the decimal point go? (a) 0.342 (b) 342 (c) 3.42 (d) 34.2
  36. 36.0.68 × 0.4 — where does the decimal point go? (a) 0.00272 (b) 2.72 (c) 0.272 (d) 0.0272
  37. 37.0.27 × 4 — where does the decimal point go? (a) 0.108 (b) 10.8 (c) 0.0108 (d) 1.08
  38. 38.0.13 × 2.6 — where does the decimal point go? (a) 3.38 (b) 0.338 (c) 0.00338 (d) 0.0338
  39. 39.8.4 × 0.3 — where does the decimal point go? (a) 2.52 (b) 25.2 (c) 0.252 (d) 0.0252
  40. 40.0.97 × 4.7 — where does the decimal point go? (a) 4.559 (b) 0.4559 (c) 45.59 (d) 0.04559

Answer key

  1. 36.5
  2. 0.558
  3. 67.2
  4. 3.569
  5. 2.618
  6. 1.82
  7. 8.2
  8. 21.06
  9. 2.28
  10. 2.32
  11. 2.43
  12. 4.4
  13. 7.52
  14. 0.234
  15. 24.8
  16. 1.456
  17. 7.2
  18. 61.2
  19. 47.5
  20. 4.96
  21. 74.4
  22. 9.5
  23. 39.5
  24. 24.64
  25. 19.8
  26. 6.48
  27. 18.9
  28. 0.798
  29. 6.67
  30. 0.324
  31. 1.12
  32. 3.792
  33. 9.6
  34. 15.6
  35. 34.2
  36. 0.272
  37. 1.08
  38. 0.338
  39. 2.52
  40. 4.559

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