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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 436 · 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. 1.6.8 × 2.4 — where does the decimal point go? (a) 163.2 (b) 16.32 (c) 1.632 (d) 0.1632
  2. 2.0.32 × 8 — where does the decimal point go? (a) 0.0256 (b) 25.6 (c) 0.256 (d) 2.56
  3. 3.0.18 × 2 — where does the decimal point go? (a) 3.6 (b) 0.036 (c) 0.36 (d) 0.0036
  4. 4.7.2 × 0.4 — where does the decimal point go? (a) 28.8 (b) 2.88 (c) 0.0288 (d) 0.288
  5. 5.2.4 × 2 — where does the decimal point go? (a) 0.48 (b) 48 (c) 0.048 (d) 4.8
  6. 6.9.4 × 0.6 — where does the decimal point go? (a) 0.564 (b) 5.64 (c) 56.4 (d) 0.0564
  7. 7.1.6 × 1.1 — where does the decimal point go? (a) 1.76 (b) 0.0176 (c) 17.6 (d) 0.176
  8. 8.1.8 × 33 — where does the decimal point go? (a) 5.94 (b) 594 (c) 0.594 (d) 59.4
  9. 9.0.81 × 0.4 — where does the decimal point go? (a) 0.00324 (b) 0.0324 (c) 3.24 (d) 0.324
  10. 10.9.4 × 2 — where does the decimal point go? (a) 0.188 (b) 1.88 (c) 18.8 (d) 188
  11. 11.0.17 × 0.4 — where does the decimal point go? (a) 0.068 (b) 0.0068 (c) 0.00068 (d) 0.68
  12. 12.0.15 × 43 — where does the decimal point go? (a) 0.645 (b) 0.0645 (c) 64.5 (d) 6.45
  13. 13.0.53 × 0.6 — where does the decimal point go? (a) 0.00318 (b) 0.318 (c) 3.18 (d) 0.0318
  14. 14.9.8 × 23 — where does the decimal point go? (a) 22.54 (b) 225.4 (c) 2.254 (d) 2254
  15. 15.0.39 × 1.6 — where does the decimal point go? (a) 0.00624 (b) 0.624 (c) 0.0624 (d) 6.24
  16. 16.3.1 × 5 — where does the decimal point go? (a) 15.5 (b) 0.155 (c) 1.55 (d) 155
  17. 17.1.4 × 43 — where does the decimal point go? (a) 60.2 (b) 602 (c) 0.602 (d) 6.02
  18. 18.0.41 × 7 — where does the decimal point go? (a) 0.0287 (b) 0.287 (c) 2.87 (d) 28.7
  19. 19.4.9 × 1.8 — where does the decimal point go? (a) 8.82 (b) 88.2 (c) 0.882 (d) 0.0882
  20. 20.2.2 × 0.4 — where does the decimal point go? (a) 0.0088 (b) 0.88 (c) 8.8 (d) 0.088
  21. 21.0.31 × 4.3 — where does the decimal point go? (a) 13.33 (b) 0.1333 (c) 0.01333 (d) 1.333
  22. 22.0.47 × 4.8 — where does the decimal point go? (a) 22.56 (b) 0.2256 (c) 2.256 (d) 0.02256
  23. 23.3.9 × 4.7 — where does the decimal point go? (a) 18.33 (b) 0.1833 (c) 1.833 (d) 183.3
  24. 24.0.75 × 21 — where does the decimal point go? (a) 1.575 (b) 157.5 (c) 15.75 (d) 0.1575
  25. 25.0.44 × 11 — where does the decimal point go? (a) 4.84 (b) 0.0484 (c) 0.484 (d) 48.4
  26. 26.0.93 × 4.9 — where does the decimal point go? (a) 0.04557 (b) 45.57 (c) 4.557 (d) 0.4557
  27. 27.2.5 × 1.3 — where does the decimal point go? (a) 3.25 (b) 32.5 (c) 0.0325 (d) 0.325
  28. 28.6.4 × 17 — where does the decimal point go? (a) 108.8 (b) 1.088 (c) 10.88 (d) 1088
  29. 29.0.48 × 2.9 — where does the decimal point go? (a) 0.1392 (b) 1.392 (c) 13.92 (d) 0.01392
  30. 30.2.9 × 9 — where does the decimal point go? (a) 2.61 (b) 26.1 (c) 261 (d) 0.261
  31. 31.1.9 × 48 — where does the decimal point go? (a) 0.912 (b) 9.12 (c) 91.2 (d) 912
  32. 32.1.9 × 41 — where does the decimal point go? (a) 7.79 (b) 77.9 (c) 0.779 (d) 779
  33. 33.0.55 × 31 — where does the decimal point go? (a) 1.705 (b) 17.05 (c) 170.5 (d) 0.1705
  34. 34.0.48 × 3 — where does the decimal point go? (a) 1.44 (b) 0.144 (c) 14.4 (d) 0.0144
  35. 35.6.4 × 0.3 — where does the decimal point go? (a) 19.2 (b) 1.92 (c) 0.0192 (d) 0.192
  36. 36.5.6 × 46 — where does the decimal point go? (a) 2576 (b) 257.6 (c) 25.76 (d) 2.576
  37. 37.4.7 × 9 — where does the decimal point go? (a) 42.3 (b) 0.423 (c) 423 (d) 4.23
  38. 38.0.32 × 41 — where does the decimal point go? (a) 131.2 (b) 0.1312 (c) 13.12 (d) 1.312
  39. 39.0.53 × 0.2 — where does the decimal point go? (a) 1.06 (b) 0.00106 (c) 0.0106 (d) 0.106
  40. 40.0.77 × 14 — where does the decimal point go? (a) 107.8 (b) 0.1078 (c) 1.078 (d) 10.78

Answer key

  1. 16.32
  2. 2.56
  3. 0.36
  4. 2.88
  5. 4.8
  6. 5.64
  7. 1.76
  8. 59.4
  9. 0.324
  10. 18.8
  11. 0.068
  12. 6.45
  13. 0.318
  14. 225.4
  15. 0.624
  16. 15.5
  17. 60.2
  18. 2.87
  19. 8.82
  20. 0.88
  21. 1.333
  22. 2.256
  23. 18.33
  24. 15.75
  25. 4.84
  26. 4.557
  27. 3.25
  28. 108.8
  29. 1.392
  30. 26.1
  31. 91.2
  32. 77.9
  33. 17.05
  34. 1.44
  35. 1.92
  36. 257.6
  37. 42.3
  38. 13.12
  39. 0.106
  40. 10.78

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