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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 157 · 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. 1.0.91 × 6 — where does the decimal point go? (a) 0.0546 (b) 0.546 (c) 5.46 (d) 54.6
  2. 2.0.96 × 0.3 — where does the decimal point go? (a) 0.0288 (b) 0.00288 (c) 2.88 (d) 0.288
  3. 3.0.17 × 3 — where does the decimal point go? (a) 0.051 (b) 5.1 (c) 0.51 (d) 0.0051
  4. 4.0.66 × 12 — where does the decimal point go? (a) 7.92 (b) 0.0792 (c) 79.2 (d) 0.792
  5. 5.0.74 × 17 — where does the decimal point go? (a) 1.258 (b) 12.58 (c) 0.1258 (d) 125.8
  6. 6.9.1 × 6 — where does the decimal point go? (a) 546 (b) 0.546 (c) 5.46 (d) 54.6
  7. 7.0.79 × 4 — where does the decimal point go? (a) 3.16 (b) 0.0316 (c) 31.6 (d) 0.316
  8. 8.8.4 × 2 — where does the decimal point go? (a) 16.8 (b) 168 (c) 1.68 (d) 0.168
  9. 9.0.88 × 7 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 6.16 (d) 61.6
  10. 10.5.4 × 4 — where does the decimal point go? (a) 0.216 (b) 216 (c) 21.6 (d) 2.16
  11. 11.9.5 × 0.9 — where does the decimal point go? (a) 0.855 (b) 8.55 (c) 0.0855 (d) 85.5
  12. 12.4.4 × 4 — where does the decimal point go? (a) 176 (b) 1.76 (c) 17.6 (d) 0.176
  13. 13.8.6 × 9 — where does the decimal point go? (a) 77.4 (b) 0.774 (c) 774 (d) 7.74
  14. 14.0.53 × 29 — where does the decimal point go? (a) 153.7 (b) 0.1537 (c) 15.37 (d) 1.537
  15. 15.0.17 × 0.3 — where does the decimal point go? (a) 0.0051 (b) 0.051 (c) 0.00051 (d) 0.51
  16. 16.5.7 × 7 — where does the decimal point go? (a) 0.399 (b) 3.99 (c) 39.9 (d) 399
  17. 17.0.27 × 17 — where does the decimal point go? (a) 0.459 (b) 4.59 (c) 0.0459 (d) 45.9
  18. 18.0.22 × 23 — where does the decimal point go? (a) 0.0506 (b) 0.506 (c) 5.06 (d) 50.6
  19. 19.0.73 × 0.4 — where does the decimal point go? (a) 0.0292 (b) 0.292 (c) 0.00292 (d) 2.92
  20. 20.9.2 × 4.9 — where does the decimal point go? (a) 450.8 (b) 4.508 (c) 0.4508 (d) 45.08
  21. 21.0.77 × 39 — where does the decimal point go? (a) 300.3 (b) 30.03 (c) 0.3003 (d) 3.003
  22. 22.8.8 × 16 — where does the decimal point go? (a) 1408 (b) 140.8 (c) 1.408 (d) 14.08
  23. 23.8.6 × 0.3 — where does the decimal point go? (a) 0.0258 (b) 2.58 (c) 25.8 (d) 0.258
  24. 24.9.8 × 0.6 — where does the decimal point go? (a) 5.88 (b) 0.588 (c) 0.0588 (d) 58.8
  25. 25.0.44 × 38 — where does the decimal point go? (a) 16.72 (b) 167.2 (c) 1.672 (d) 0.1672
  26. 26.7.8 × 3 — where does the decimal point go? (a) 234 (b) 23.4 (c) 0.234 (d) 2.34
  27. 27.6.7 × 0.3 — where does the decimal point go? (a) 0.201 (b) 2.01 (c) 20.1 (d) 0.0201
  28. 28.0.27 × 19 — where does the decimal point go? (a) 0.0513 (b) 0.513 (c) 5.13 (d) 51.3
  29. 29.2.8 × 4.7 — where does the decimal point go? (a) 1.316 (b) 131.6 (c) 0.1316 (d) 13.16
  30. 30.0.59 × 1.2 — where does the decimal point go? (a) 0.00708 (b) 0.708 (c) 7.08 (d) 0.0708
  31. 31.5.4 × 0.8 — where does the decimal point go? (a) 0.432 (b) 4.32 (c) 43.2 (d) 0.0432
  32. 32.6.5 × 1.9 — where does the decimal point go? (a) 123.5 (b) 12.35 (c) 0.1235 (d) 1.235
  33. 33.7.4 × 3 — where does the decimal point go? (a) 22.2 (b) 222 (c) 2.22 (d) 0.222
  34. 34.8.1 × 1.6 — where does the decimal point go? (a) 1.296 (b) 0.1296 (c) 129.6 (d) 12.96
  35. 35.0.13 × 15 — where does the decimal point go? (a) 19.5 (b) 0.195 (c) 0.0195 (d) 1.95
  36. 36.0.45 × 5 — where does the decimal point go? (a) 0.225 (b) 2.25 (c) 0.0225 (d) 22.5
  37. 37.1.7 × 42 — where does the decimal point go? (a) 71.4 (b) 7.14 (c) 0.714 (d) 714
  38. 38.0.44 × 4 — where does the decimal point go? (a) 0.176 (b) 1.76 (c) 0.0176 (d) 17.6
  39. 39.8.6 × 4.3 — where does the decimal point go? (a) 3.698 (b) 0.3698 (c) 369.8 (d) 36.98
  40. 40.1.7 × 16 — where does the decimal point go? (a) 27.2 (b) 272 (c) 2.72 (d) 0.272

Answer key

  1. 5.46
  2. 0.288
  3. 0.51
  4. 7.92
  5. 12.58
  6. 54.6
  7. 3.16
  8. 16.8
  9. 6.16
  10. 21.6
  11. 8.55
  12. 17.6
  13. 77.4
  14. 15.37
  15. 0.051
  16. 39.9
  17. 4.59
  18. 5.06
  19. 0.292
  20. 45.08
  21. 30.03
  22. 140.8
  23. 2.58
  24. 5.88
  25. 16.72
  26. 23.4
  27. 2.01
  28. 5.13
  29. 13.16
  30. 0.708
  31. 4.32
  32. 12.35
  33. 22.2
  34. 12.96
  35. 1.95
  36. 2.25
  37. 71.4
  38. 1.76
  39. 36.98
  40. 27.2

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