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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 651 · 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. 1.2.8 × 26 — where does the decimal point go? (a) 72.8 (b) 7.28 (c) 0.728 (d) 728
  2. 2.6.8 × 2.7 — where does the decimal point go? (a) 183.6 (b) 0.1836 (c) 18.36 (d) 1.836
  3. 3.0.66 × 9 — where does the decimal point go? (a) 59.4 (b) 0.0594 (c) 5.94 (d) 0.594
  4. 4.2.8 × 8 — where does the decimal point go? (a) 22.4 (b) 2.24 (c) 224 (d) 0.224
  5. 5.8.1 × 6 — where does the decimal point go? (a) 486 (b) 48.6 (c) 4.86 (d) 0.486
  6. 6.0.19 × 0.7 — where does the decimal point go? (a) 0.0133 (b) 0.133 (c) 1.33 (d) 0.00133
  7. 7.5.6 × 16 — where does the decimal point go? (a) 89.6 (b) 0.896 (c) 8.96 (d) 896
  8. 8.0.14 × 4.9 — where does the decimal point go? (a) 0.686 (b) 0.0686 (c) 0.00686 (d) 6.86
  9. 9.3.2 × 6 — where does the decimal point go? (a) 1.92 (b) 0.192 (c) 19.2 (d) 192
  10. 10.0.52 × 8 — where does the decimal point go? (a) 0.416 (b) 41.6 (c) 4.16 (d) 0.0416
  11. 11.0.59 × 3.6 — where does the decimal point go? (a) 2.124 (b) 21.24 (c) 0.2124 (d) 0.02124
  12. 12.0.17 × 31 — where does the decimal point go? (a) 52.7 (b) 0.0527 (c) 0.527 (d) 5.27
  13. 13.0.65 × 33 — where does the decimal point go? (a) 2.145 (b) 21.45 (c) 214.5 (d) 0.2145
  14. 14.3.4 × 3 — where does the decimal point go? (a) 10.2 (b) 1.02 (c) 102 (d) 0.102
  15. 15.9.8 × 2.6 — where does the decimal point go? (a) 254.8 (b) 2.548 (c) 25.48 (d) 0.2548
  16. 16.9.2 × 6 — where does the decimal point go? (a) 552 (b) 5.52 (c) 0.552 (d) 55.2
  17. 17.6.3 × 7 — where does the decimal point go? (a) 44.1 (b) 4.41 (c) 0.441 (d) 441
  18. 18.7.3 × 0.6 — where does the decimal point go? (a) 4.38 (b) 43.8 (c) 0.0438 (d) 0.438
  19. 19.9.4 × 49 — where does the decimal point go? (a) 46.06 (b) 4.606 (c) 460.6 (d) 4606
  20. 20.0.17 × 7 — where does the decimal point go? (a) 11.9 (b) 0.119 (c) 1.19 (d) 0.0119
  21. 21.0.61 × 6 — where does the decimal point go? (a) 3.66 (b) 0.0366 (c) 36.6 (d) 0.366
  22. 22.7.7 × 1.1 — where does the decimal point go? (a) 0.847 (b) 0.0847 (c) 8.47 (d) 84.7
  23. 23.3.1 × 4.9 — where does the decimal point go? (a) 151.9 (b) 1.519 (c) 15.19 (d) 0.1519
  24. 24.6.7 × 6 — where does the decimal point go? (a) 0.402 (b) 402 (c) 4.02 (d) 40.2
  25. 25.0.88 × 0.8 — where does the decimal point go? (a) 0.0704 (b) 0.00704 (c) 0.704 (d) 7.04
  26. 26.8.6 × 0.2 — where does the decimal point go? (a) 17.2 (b) 1.72 (c) 0.172 (d) 0.0172
  27. 27.0.13 × 43 — where does the decimal point go? (a) 5.59 (b) 0.559 (c) 55.9 (d) 0.0559
  28. 28.2.8 × 13 — where does the decimal point go? (a) 36.4 (b) 364 (c) 3.64 (d) 0.364
  29. 29.0.49 × 36 — where does the decimal point go? (a) 0.1764 (b) 176.4 (c) 1.764 (d) 17.64
  30. 30.0.97 × 4.3 — where does the decimal point go? (a) 0.4171 (b) 41.71 (c) 4.171 (d) 0.04171
  31. 31.0.27 × 37 — where does the decimal point go? (a) 99.9 (b) 0.0999 (c) 9.99 (d) 0.999
  32. 32.0.81 × 1.8 — where does the decimal point go? (a) 1.458 (b) 0.01458 (c) 0.1458 (d) 14.58
  33. 33.0.31 × 0.2 — where does the decimal point go? (a) 0.062 (b) 0.0062 (c) 0.00062 (d) 0.62
  34. 34.6.3 × 0.3 — where does the decimal point go? (a) 1.89 (b) 18.9 (c) 0.0189 (d) 0.189
  35. 35.6.4 × 46 — where does the decimal point go? (a) 294.4 (b) 2944 (c) 29.44 (d) 2.944
  36. 36.0.26 × 0.6 — where does the decimal point go? (a) 1.56 (b) 0.156 (c) 0.0156 (d) 0.00156
  37. 37.0.71 × 0.9 — where does the decimal point go? (a) 0.639 (b) 6.39 (c) 0.00639 (d) 0.0639
  38. 38.0.72 × 4.7 — where does the decimal point go? (a) 3.384 (b) 0.03384 (c) 0.3384 (d) 33.84
  39. 39.3.5 × 3 — where does the decimal point go? (a) 1.05 (b) 105 (c) 0.105 (d) 10.5
  40. 40.5.6 × 3 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 168 (d) 0.168

Answer key

  1. 72.8
  2. 18.36
  3. 5.94
  4. 22.4
  5. 48.6
  6. 0.133
  7. 89.6
  8. 0.686
  9. 19.2
  10. 4.16
  11. 2.124
  12. 5.27
  13. 21.45
  14. 10.2
  15. 25.48
  16. 55.2
  17. 44.1
  18. 4.38
  19. 460.6
  20. 1.19
  21. 3.66
  22. 8.47
  23. 15.19
  24. 40.2
  25. 0.704
  26. 1.72
  27. 5.59
  28. 36.4
  29. 17.64
  30. 4.171
  31. 9.99
  32. 1.458
  33. 0.062
  34. 1.89
  35. 294.4
  36. 0.156
  37. 0.639
  38. 3.384
  39. 10.5
  40. 16.8

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