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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 51 · 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. 1.1.3 × 0.3 — where does the decimal point go? (a) 0.39 (b) 3.9 (c) 0.0039 (d) 0.039
  2. 2.4.9 × 3.8 — where does the decimal point go? (a) 18.62 (b) 1.862 (c) 0.1862 (d) 186.2
  3. 3.0.13 × 18 — where does the decimal point go? (a) 0.0234 (b) 2.34 (c) 0.234 (d) 23.4
  4. 4.7.7 × 9 — where does the decimal point go? (a) 693 (b) 0.693 (c) 6.93 (d) 69.3
  5. 5.4.6 × 18 — where does the decimal point go? (a) 8.28 (b) 828 (c) 82.8 (d) 0.828
  6. 6.8.5 × 0.3 — where does the decimal point go? (a) 0.255 (b) 2.55 (c) 25.5 (d) 0.0255
  7. 7.0.57 × 5 — where does the decimal point go? (a) 2.85 (b) 28.5 (c) 0.285 (d) 0.0285
  8. 8.5.2 × 8 — where does the decimal point go? (a) 4.16 (b) 41.6 (c) 0.416 (d) 416
  9. 9.9.3 × 0.5 — where does the decimal point go? (a) 4.65 (b) 46.5 (c) 0.465 (d) 0.0465
  10. 10.8.3 × 3.3 — where does the decimal point go? (a) 0.2739 (b) 273.9 (c) 27.39 (d) 2.739
  11. 11.0.81 × 2 — where does the decimal point go? (a) 1.62 (b) 0.0162 (c) 0.162 (d) 16.2
  12. 12.2.3 × 2 — where does the decimal point go? (a) 0.46 (b) 4.6 (c) 0.046 (d) 46
  13. 13.0.79 × 5 — where does the decimal point go? (a) 0.0395 (b) 39.5 (c) 3.95 (d) 0.395
  14. 14.0.88 × 2.8 — where does the decimal point go? (a) 2.464 (b) 0.02464 (c) 0.2464 (d) 24.64
  15. 15.0.62 × 22 — where does the decimal point go? (a) 1.364 (b) 13.64 (c) 0.1364 (d) 136.4
  16. 16.9.8 × 4 — where does the decimal point go? (a) 392 (b) 39.2 (c) 0.392 (d) 3.92
  17. 17.5.5 × 0.7 — where does the decimal point go? (a) 38.5 (b) 0.0385 (c) 3.85 (d) 0.385
  18. 18.0.54 × 8 — where does the decimal point go? (a) 43.2 (b) 0.0432 (c) 0.432 (d) 4.32
  19. 19.0.42 × 6 — where does the decimal point go? (a) 2.52 (b) 0.252 (c) 0.0252 (d) 25.2
  20. 20.7.2 × 7 — where does the decimal point go? (a) 5.04 (b) 50.4 (c) 504 (d) 0.504
  21. 21.7.5 × 1.1 — where does the decimal point go? (a) 8.25 (b) 82.5 (c) 0.0825 (d) 0.825
  22. 22.0.52 × 4.8 — where does the decimal point go? (a) 2.496 (b) 0.02496 (c) 0.2496 (d) 24.96
  23. 23.7.1 × 0.2 — where does the decimal point go? (a) 0.142 (b) 14.2 (c) 0.0142 (d) 1.42
  24. 24.1.7 × 0.7 — where does the decimal point go? (a) 0.119 (b) 11.9 (c) 1.19 (d) 0.0119
  25. 25.6.7 × 4 — where does the decimal point go? (a) 2.68 (b) 0.268 (c) 268 (d) 26.8
  26. 26.0.25 × 2.7 — where does the decimal point go? (a) 0.675 (b) 6.75 (c) 0.0675 (d) 0.00675
  27. 27.2.7 × 2 — where does the decimal point go? (a) 54 (b) 5.4 (c) 0.54 (d) 0.054
  28. 28.4.2 × 7 — where does the decimal point go? (a) 2.94 (b) 294 (c) 0.294 (d) 29.4
  29. 29.3.4 × 0.4 — where does the decimal point go? (a) 1.36 (b) 0.0136 (c) 13.6 (d) 0.136
  30. 30.1.9 × 0.6 — where does the decimal point go? (a) 0.0114 (b) 0.114 (c) 11.4 (d) 1.14
  31. 31.0.19 × 1.4 — where does the decimal point go? (a) 0.0266 (b) 0.266 (c) 0.00266 (d) 2.66
  32. 32.5.7 × 0.3 — where does the decimal point go? (a) 17.1 (b) 0.171 (c) 0.0171 (d) 1.71
  33. 33.0.74 × 2 — where does the decimal point go? (a) 0.0148 (b) 1.48 (c) 0.148 (d) 14.8
  34. 34.0.73 × 0.5 — where does the decimal point go? (a) 0.0365 (b) 0.365 (c) 0.00365 (d) 3.65
  35. 35.5.9 × 9 — where does the decimal point go? (a) 0.531 (b) 531 (c) 5.31 (d) 53.1
  36. 36.0.18 × 42 — where does the decimal point go? (a) 7.56 (b) 75.6 (c) 0.756 (d) 0.0756
  37. 37.4.8 × 4.9 — where does the decimal point go? (a) 235.2 (b) 23.52 (c) 2.352 (d) 0.2352
  38. 38.0.44 × 1.4 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 6.16 (d) 0.00616
  39. 39.0.87 × 26 — where does the decimal point go? (a) 22.62 (b) 226.2 (c) 2.262 (d) 0.2262
  40. 40.0.36 × 4.2 — where does the decimal point go? (a) 1.512 (b) 0.1512 (c) 0.01512 (d) 15.12

Answer key

  1. 0.39
  2. 18.62
  3. 2.34
  4. 69.3
  5. 82.8
  6. 2.55
  7. 2.85
  8. 41.6
  9. 4.65
  10. 27.39
  11. 1.62
  12. 4.6
  13. 3.95
  14. 2.464
  15. 13.64
  16. 39.2
  17. 3.85
  18. 4.32
  19. 2.52
  20. 50.4
  21. 8.25
  22. 2.496
  23. 1.42
  24. 1.19
  25. 26.8
  26. 0.675
  27. 5.4
  28. 29.4
  29. 1.36
  30. 1.14
  31. 0.266
  32. 1.71
  33. 1.48
  34. 0.365
  35. 53.1
  36. 7.56
  37. 23.52
  38. 0.616
  39. 22.62
  40. 1.512

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