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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 576 · 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. 1.8.1 × 0.3 — where does the decimal point go? (a) 2.43 (b) 0.243 (c) 0.0243 (d) 24.3
  2. 2.0.47 × 13 — where does the decimal point go? (a) 61.1 (b) 6.11 (c) 0.0611 (d) 0.611
  3. 3.0.94 × 0.9 — where does the decimal point go? (a) 8.46 (b) 0.00846 (c) 0.846 (d) 0.0846
  4. 4.1.8 × 31 — where does the decimal point go? (a) 558 (b) 5.58 (c) 0.558 (d) 55.8
  5. 5.0.61 × 0.9 — where does the decimal point go? (a) 5.49 (b) 0.0549 (c) 0.549 (d) 0.00549
  6. 6.0.95 × 0.3 — where does the decimal point go? (a) 0.00285 (b) 0.0285 (c) 0.285 (d) 2.85
  7. 7.9.8 × 33 — where does the decimal point go? (a) 3.234 (b) 3234 (c) 32.34 (d) 323.4
  8. 8.2.5 × 1.3 — where does the decimal point go? (a) 0.325 (b) 3.25 (c) 32.5 (d) 0.0325
  9. 9.0.27 × 7 — where does the decimal point go? (a) 0.189 (b) 18.9 (c) 1.89 (d) 0.0189
  10. 10.0.14 × 0.7 — where does the decimal point go? (a) 0.098 (b) 0.00098 (c) 0.0098 (d) 0.98
  11. 11.4.9 × 4.6 — where does the decimal point go? (a) 2.254 (b) 225.4 (c) 0.2254 (d) 22.54
  12. 12.1.2 × 18 — where does the decimal point go? (a) 0.216 (b) 216 (c) 21.6 (d) 2.16
  13. 13.0.19 × 35 — where does the decimal point go? (a) 66.5 (b) 0.0665 (c) 6.65 (d) 0.665
  14. 14.8.7 × 17 — where does the decimal point go? (a) 1.479 (b) 147.9 (c) 14.79 (d) 1479
  15. 15.8.6 × 48 — where does the decimal point go? (a) 4.128 (b) 412.8 (c) 4128 (d) 41.28
  16. 16.0.86 × 2 — where does the decimal point go? (a) 0.0172 (b) 1.72 (c) 17.2 (d) 0.172
  17. 17.3.8 × 3 — where does the decimal point go? (a) 0.114 (b) 11.4 (c) 1.14 (d) 114
  18. 18.0.75 × 2.5 — where does the decimal point go? (a) 0.1875 (b) 1.875 (c) 18.75 (d) 0.01875
  19. 19.7.3 × 3.6 — where does the decimal point go? (a) 0.2628 (b) 2.628 (c) 262.8 (d) 26.28
  20. 20.0.77 × 3.1 — where does the decimal point go? (a) 2.387 (b) 23.87 (c) 0.2387 (d) 0.02387
  21. 21.0.86 × 0.3 — where does the decimal point go? (a) 0.0258 (b) 0.258 (c) 0.00258 (d) 2.58
  22. 22.3.1 × 2.7 — where does the decimal point go? (a) 83.7 (b) 0.0837 (c) 0.837 (d) 8.37
  23. 23.6.3 × 26 — where does the decimal point go? (a) 163.8 (b) 1.638 (c) 1638 (d) 16.38
  24. 24.0.29 × 4 — where does the decimal point go? (a) 0.0116 (b) 11.6 (c) 1.16 (d) 0.116
  25. 25.5.6 × 7 — where does the decimal point go? (a) 392 (b) 3.92 (c) 39.2 (d) 0.392
  26. 26.3.3 × 24 — where does the decimal point go? (a) 7.92 (b) 79.2 (c) 792 (d) 0.792
  27. 27.0.45 × 0.7 — where does the decimal point go? (a) 0.315 (b) 3.15 (c) 0.0315 (d) 0.00315
  28. 28.2.6 × 12 — where does the decimal point go? (a) 0.312 (b) 31.2 (c) 3.12 (d) 312
  29. 29.2.2 × 9 — where does the decimal point go? (a) 1.98 (b) 198 (c) 19.8 (d) 0.198
  30. 30.5.1 × 12 — where does the decimal point go? (a) 0.612 (b) 612 (c) 61.2 (d) 6.12
  31. 31.5.3 × 27 — where does the decimal point go? (a) 143.1 (b) 1431 (c) 14.31 (d) 1.431
  32. 32.5.3 × 4 — where does the decimal point go? (a) 0.212 (b) 212 (c) 2.12 (d) 21.2
  33. 33.6.2 × 44 — where does the decimal point go? (a) 2.728 (b) 2728 (c) 27.28 (d) 272.8
  34. 34.0.42 × 4.4 — where does the decimal point go? (a) 1.848 (b) 0.1848 (c) 18.48 (d) 0.01848
  35. 35.0.76 × 4 — where does the decimal point go? (a) 0.0304 (b) 3.04 (c) 0.304 (d) 30.4
  36. 36.0.89 × 13 — where does the decimal point go? (a) 115.7 (b) 0.1157 (c) 1.157 (d) 11.57
  37. 37.2.2 × 49 — where does the decimal point go? (a) 10.78 (b) 1.078 (c) 1078 (d) 107.8
  38. 38.8.9 × 0.6 — where does the decimal point go? (a) 5.34 (b) 0.0534 (c) 0.534 (d) 53.4
  39. 39.7.7 × 28 — where does the decimal point go? (a) 2.156 (b) 2156 (c) 21.56 (d) 215.6
  40. 40.0.94 × 24 — where does the decimal point go? (a) 22.56 (b) 0.2256 (c) 225.6 (d) 2.256

Answer key

  1. 2.43
  2. 6.11
  3. 0.846
  4. 55.8
  5. 0.549
  6. 0.285
  7. 323.4
  8. 3.25
  9. 1.89
  10. 0.098
  11. 22.54
  12. 21.6
  13. 6.65
  14. 147.9
  15. 412.8
  16. 1.72
  17. 11.4
  18. 1.875
  19. 26.28
  20. 2.387
  21. 0.258
  22. 8.37
  23. 163.8
  24. 1.16
  25. 39.2
  26. 79.2
  27. 0.315
  28. 31.2
  29. 19.8
  30. 61.2
  31. 143.1
  32. 21.2
  33. 272.8
  34. 1.848
  35. 3.04
  36. 11.57
  37. 107.8
  38. 5.34
  39. 215.6
  40. 22.56

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