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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 117 · 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. 1.2.6 × 6 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 156 (d) 15.6
  2. 2.2.4 × 4.4 — where does the decimal point go? (a) 0.1056 (b) 1.056 (c) 105.6 (d) 10.56
  3. 3.0.36 × 0.9 — where does the decimal point go? (a) 3.24 (b) 0.0324 (c) 0.324 (d) 0.00324
  4. 4.0.89 × 5 — where does the decimal point go? (a) 4.45 (b) 44.5 (c) 0.445 (d) 0.0445
  5. 5.9.1 × 4 — where does the decimal point go? (a) 3.64 (b) 36.4 (c) 0.364 (d) 364
  6. 6.0.16 × 46 — where does the decimal point go? (a) 73.6 (b) 0.736 (c) 7.36 (d) 0.0736
  7. 7.8.3 × 0.3 — where does the decimal point go? (a) 24.9 (b) 0.0249 (c) 0.249 (d) 2.49
  8. 8.0.36 × 0.6 — where does the decimal point go? (a) 0.00216 (b) 2.16 (c) 0.0216 (d) 0.216
  9. 9.2.5 × 3 — where does the decimal point go? (a) 0.075 (b) 7.5 (c) 75 (d) 0.75
  10. 10.0.93 × 0.9 — where does the decimal point go? (a) 0.00837 (b) 8.37 (c) 0.0837 (d) 0.837
  11. 11.0.21 × 5 — where does the decimal point go? (a) 10.5 (b) 0.0105 (c) 1.05 (d) 0.105
  12. 12.5.3 × 7 — where does the decimal point go? (a) 37.1 (b) 0.371 (c) 371 (d) 3.71
  13. 13.3.2 × 0.8 — where does the decimal point go? (a) 0.0256 (b) 2.56 (c) 0.256 (d) 25.6
  14. 14.5.2 × 2.3 — where does the decimal point go? (a) 0.1196 (b) 119.6 (c) 1.196 (d) 11.96
  15. 15.1.7 × 14 — where does the decimal point go? (a) 2.38 (b) 0.238 (c) 238 (d) 23.8
  16. 16.7.4 × 6 — where does the decimal point go? (a) 0.444 (b) 4.44 (c) 444 (d) 44.4
  17. 17.0.79 × 4.5 — where does the decimal point go? (a) 3.555 (b) 0.03555 (c) 35.55 (d) 0.3555
  18. 18.4.1 × 0.8 — where does the decimal point go? (a) 0.328 (b) 32.8 (c) 0.0328 (d) 3.28
  19. 19.0.77 × 0.7 — where does the decimal point go? (a) 0.00539 (b) 0.0539 (c) 5.39 (d) 0.539
  20. 20.6.1 × 2.6 — where does the decimal point go? (a) 1.586 (b) 0.1586 (c) 158.6 (d) 15.86
  21. 21.2.1 × 0.3 — where does the decimal point go? (a) 6.3 (b) 0.0063 (c) 0.063 (d) 0.63
  22. 22.8.7 × 9 — where does the decimal point go? (a) 78.3 (b) 7.83 (c) 0.783 (d) 783
  23. 23.3.9 × 32 — where does the decimal point go? (a) 12.48 (b) 124.8 (c) 1.248 (d) 1248
  24. 24.0.66 × 21 — where does the decimal point go? (a) 138.6 (b) 1.386 (c) 0.1386 (d) 13.86
  25. 25.7.9 × 3 — where does the decimal point go? (a) 2.37 (b) 23.7 (c) 237 (d) 0.237
  26. 26.3.1 × 4.3 — where does the decimal point go? (a) 1.333 (b) 133.3 (c) 0.1333 (d) 13.33
  27. 27.2.6 × 34 — where does the decimal point go? (a) 8.84 (b) 88.4 (c) 0.884 (d) 884
  28. 28.0.84 × 13 — where does the decimal point go? (a) 10.92 (b) 1.092 (c) 109.2 (d) 0.1092
  29. 29.6.1 × 46 — where does the decimal point go? (a) 2806 (b) 280.6 (c) 2.806 (d) 28.06
  30. 30.0.32 × 0.3 — where does the decimal point go? (a) 0.00096 (b) 0.0096 (c) 0.96 (d) 0.096
  31. 31.0.73 × 0.5 — where does the decimal point go? (a) 0.0365 (b) 0.365 (c) 3.65 (d) 0.00365
  32. 32.0.52 × 6 — where does the decimal point go? (a) 0.312 (b) 31.2 (c) 0.0312 (d) 3.12
  33. 33.0.84 × 39 — where does the decimal point go? (a) 327.6 (b) 0.3276 (c) 32.76 (d) 3.276
  34. 34.6.4 × 0.9 — where does the decimal point go? (a) 57.6 (b) 0.576 (c) 0.0576 (d) 5.76
  35. 35.0.58 × 3.2 — where does the decimal point go? (a) 18.56 (b) 0.1856 (c) 1.856 (d) 0.01856
  36. 36.0.84 × 4 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 3.36 (d) 33.6
  37. 37.0.69 × 0.8 — where does the decimal point go? (a) 0.0552 (b) 5.52 (c) 0.00552 (d) 0.552
  38. 38.9.1 × 22 — where does the decimal point go? (a) 200.2 (b) 2002 (c) 20.02 (d) 2.002
  39. 39.0.55 × 0.3 — where does the decimal point go? (a) 1.65 (b) 0.0165 (c) 0.00165 (d) 0.165
  40. 40.2.1 × 34 — where does the decimal point go? (a) 0.714 (b) 7.14 (c) 714 (d) 71.4

Answer key

  1. 15.6
  2. 10.56
  3. 0.324
  4. 4.45
  5. 36.4
  6. 7.36
  7. 2.49
  8. 0.216
  9. 7.5
  10. 0.837
  11. 1.05
  12. 37.1
  13. 2.56
  14. 11.96
  15. 23.8
  16. 44.4
  17. 3.555
  18. 3.28
  19. 0.539
  20. 15.86
  21. 0.63
  22. 78.3
  23. 124.8
  24. 13.86
  25. 23.7
  26. 13.33
  27. 88.4
  28. 10.92
  29. 280.6
  30. 0.096
  31. 0.365
  32. 3.12
  33. 32.76
  34. 5.76
  35. 1.856
  36. 3.36
  37. 0.552
  38. 200.2
  39. 0.165
  40. 71.4

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