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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 196 · 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. 1.3.6 × 6 — where does the decimal point go? (a) 0.216 (b) 216 (c) 2.16 (d) 21.6
  2. 2.4.8 × 0.9 — where does the decimal point go? (a) 0.432 (b) 43.2 (c) 4.32 (d) 0.0432
  3. 3.0.19 × 1.3 — where does the decimal point go? (a) 0.247 (b) 0.0247 (c) 0.00247 (d) 2.47
  4. 4.0.61 × 3.9 — where does the decimal point go? (a) 0.02379 (b) 23.79 (c) 2.379 (d) 0.2379
  5. 5.1.5 × 0.3 — where does the decimal point go? (a) 0.0045 (b) 0.45 (c) 4.5 (d) 0.045
  6. 6.0.92 × 0.9 — where does the decimal point go? (a) 0.00828 (b) 8.28 (c) 0.0828 (d) 0.828
  7. 7.0.13 × 1.4 — where does the decimal point go? (a) 0.0182 (b) 1.82 (c) 0.00182 (d) 0.182
  8. 8.0.22 × 21 — where does the decimal point go? (a) 46.2 (b) 0.462 (c) 4.62 (d) 0.0462
  9. 9.3.7 × 41 — where does the decimal point go? (a) 1.517 (b) 15.17 (c) 151.7 (d) 1517
  10. 10.0.25 × 3 — where does the decimal point go? (a) 0.75 (b) 0.0075 (c) 7.5 (d) 0.075
  11. 11.3.1 × 28 — where does the decimal point go? (a) 0.868 (b) 8.68 (c) 86.8 (d) 868
  12. 12.7.2 × 43 — where does the decimal point go? (a) 3096 (b) 30.96 (c) 3.096 (d) 309.6
  13. 13.2.3 × 17 — where does the decimal point go? (a) 391 (b) 0.391 (c) 3.91 (d) 39.1
  14. 14.7.2 × 7 — where does the decimal point go? (a) 504 (b) 5.04 (c) 50.4 (d) 0.504
  15. 15.9.1 × 0.4 — where does the decimal point go? (a) 0.364 (b) 36.4 (c) 0.0364 (d) 3.64
  16. 16.1.4 × 7 — where does the decimal point go? (a) 98 (b) 0.098 (c) 0.98 (d) 9.8
  17. 17.0.16 × 0.2 — where does the decimal point go? (a) 0.32 (b) 0.00032 (c) 0.032 (d) 0.0032
  18. 18.7.1 × 6 — where does the decimal point go? (a) 0.426 (b) 426 (c) 4.26 (d) 42.6
  19. 19.0.61 × 8 — where does the decimal point go? (a) 4.88 (b) 0.0488 (c) 48.8 (d) 0.488
  20. 20.2.4 × 7 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 16.8 (d) 168
  21. 21.0.14 × 49 — where does the decimal point go? (a) 6.86 (b) 0.686 (c) 68.6 (d) 0.0686
  22. 22.0.56 × 17 — where does the decimal point go? (a) 9.52 (b) 95.2 (c) 0.0952 (d) 0.952
  23. 23.0.71 × 19 — where does the decimal point go? (a) 13.49 (b) 134.9 (c) 1.349 (d) 0.1349
  24. 24.8.1 × 6 — where does the decimal point go? (a) 0.486 (b) 486 (c) 4.86 (d) 48.6
  25. 25.0.53 × 4 — where does the decimal point go? (a) 0.212 (b) 0.0212 (c) 21.2 (d) 2.12
  26. 26.1.5 × 4.1 — where does the decimal point go? (a) 0.615 (b) 61.5 (c) 6.15 (d) 0.0615
  27. 27.0.43 × 2 — where does the decimal point go? (a) 0.0086 (b) 0.86 (c) 8.6 (d) 0.086
  28. 28.2.4 × 2.2 — where does the decimal point go? (a) 0.528 (b) 52.8 (c) 0.0528 (d) 5.28
  29. 29.0.48 × 37 — where does the decimal point go? (a) 0.1776 (b) 177.6 (c) 17.76 (d) 1.776
  30. 30.0.67 × 11 — where does the decimal point go? (a) 73.7 (b) 7.37 (c) 0.737 (d) 0.0737
  31. 31.0.79 × 0.4 — where does the decimal point go? (a) 0.00316 (b) 3.16 (c) 0.0316 (d) 0.316
  32. 32.9.9 × 12 — where does the decimal point go? (a) 118.8 (b) 1188 (c) 11.88 (d) 1.188
  33. 33.0.47 × 0.5 — where does the decimal point go? (a) 0.00235 (b) 0.0235 (c) 2.35 (d) 0.235
  34. 34.0.81 × 2.5 — where does the decimal point go? (a) 20.25 (b) 0.2025 (c) 2.025 (d) 0.02025
  35. 35.9.6 × 0.3 — where does the decimal point go? (a) 0.288 (b) 28.8 (c) 0.0288 (d) 2.88
  36. 36.0.87 × 0.6 — where does the decimal point go? (a) 5.22 (b) 0.0522 (c) 0.00522 (d) 0.522
  37. 37.0.91 × 0.9 — where does the decimal point go? (a) 0.819 (b) 8.19 (c) 0.0819 (d) 0.00819
  38. 38.2.8 × 2.3 — where does the decimal point go? (a) 6.44 (b) 0.644 (c) 64.4 (d) 0.0644
  39. 39.0.38 × 2 — where does the decimal point go? (a) 0.76 (b) 0.076 (c) 7.6 (d) 0.0076
  40. 40.6.2 × 4 — where does the decimal point go? (a) 24.8 (b) 0.248 (c) 248 (d) 2.48

Answer key

  1. 21.6
  2. 4.32
  3. 0.247
  4. 2.379
  5. 0.45
  6. 0.828
  7. 0.182
  8. 4.62
  9. 151.7
  10. 0.75
  11. 86.8
  12. 309.6
  13. 39.1
  14. 50.4
  15. 3.64
  16. 9.8
  17. 0.032
  18. 42.6
  19. 4.88
  20. 16.8
  21. 6.86
  22. 9.52
  23. 13.49
  24. 48.6
  25. 2.12
  26. 6.15
  27. 0.86
  28. 5.28
  29. 17.76
  30. 7.37
  31. 0.316
  32. 118.8
  33. 0.235
  34. 2.025
  35. 2.88
  36. 0.522
  37. 0.819
  38. 6.44
  39. 0.76
  40. 24.8

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