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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 775 · 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. 1.0.53 × 24 — where does the decimal point go? (a) 0.1272 (b) 1.272 (c) 127.2 (d) 12.72
  2. 2.0.99 × 21 — where does the decimal point go? (a) 20.79 (b) 207.9 (c) 2.079 (d) 0.2079
  3. 3.4.6 × 23 — where does the decimal point go? (a) 105.8 (b) 10.58 (c) 1.058 (d) 1058
  4. 4.0.61 × 9 — where does the decimal point go? (a) 5.49 (b) 0.0549 (c) 0.549 (d) 54.9
  5. 5.2.5 × 0.9 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 0.0225 (d) 22.5
  6. 6.0.38 × 4 — where does the decimal point go? (a) 0.0152 (b) 0.152 (c) 15.2 (d) 1.52
  7. 7.7.8 × 0.8 — where does the decimal point go? (a) 6.24 (b) 0.0624 (c) 62.4 (d) 0.624
  8. 8.6.1 × 32 — where does the decimal point go? (a) 19.52 (b) 195.2 (c) 1.952 (d) 1952
  9. 9.9.8 × 7 — where does the decimal point go? (a) 6.86 (b) 0.686 (c) 68.6 (d) 686
  10. 10.5.1 × 6 — where does the decimal point go? (a) 306 (b) 30.6 (c) 0.306 (d) 3.06
  11. 11.0.91 × 46 — where does the decimal point go? (a) 41.86 (b) 0.4186 (c) 4.186 (d) 418.6
  12. 12.0.27 × 4.2 — where does the decimal point go? (a) 1.134 (b) 0.01134 (c) 0.1134 (d) 11.34
  13. 13.0.24 × 43 — where does the decimal point go? (a) 0.1032 (b) 10.32 (c) 103.2 (d) 1.032
  14. 14.0.85 × 7 — where does the decimal point go? (a) 0.595 (b) 59.5 (c) 5.95 (d) 0.0595
  15. 15.2.8 × 8 — where does the decimal point go? (a) 0.224 (b) 2.24 (c) 224 (d) 22.4
  16. 16.0.79 × 0.2 — where does the decimal point go? (a) 0.00158 (b) 0.158 (c) 1.58 (d) 0.0158
  17. 17.5.8 × 4.9 — where does the decimal point go? (a) 28.42 (b) 284.2 (c) 2.842 (d) 0.2842
  18. 18.1.6 × 4 — where does the decimal point go? (a) 0.064 (b) 0.64 (c) 6.4 (d) 64
  19. 19.0.85 × 0.3 — where does the decimal point go? (a) 0.255 (b) 2.55 (c) 0.00255 (d) 0.0255
  20. 20.3.5 × 27 — where does the decimal point go? (a) 0.945 (b) 94.5 (c) 9.45 (d) 945
  21. 21.0.95 × 0.5 — where does the decimal point go? (a) 0.00475 (b) 4.75 (c) 0.0475 (d) 0.475
  22. 22.6.7 × 0.6 — where does the decimal point go? (a) 0.402 (b) 0.0402 (c) 40.2 (d) 4.02
  23. 23.0.26 × 0.4 — where does the decimal point go? (a) 1.04 (b) 0.00104 (c) 0.0104 (d) 0.104
  24. 24.0.61 × 0.4 — where does the decimal point go? (a) 2.44 (b) 0.244 (c) 0.00244 (d) 0.0244
  25. 25.8.8 × 4 — where does the decimal point go? (a) 3.52 (b) 0.352 (c) 35.2 (d) 352
  26. 26.0.48 × 8 — where does the decimal point go? (a) 3.84 (b) 0.384 (c) 38.4 (d) 0.0384
  27. 27.0.89 × 0.9 — where does the decimal point go? (a) 8.01 (b) 0.801 (c) 0.00801 (d) 0.0801
  28. 28.6.7 × 3 — where does the decimal point go? (a) 20.1 (b) 2.01 (c) 0.201 (d) 201
  29. 29.0.63 × 4.1 — where does the decimal point go? (a) 0.2583 (b) 0.02583 (c) 2.583 (d) 25.83
  30. 30.0.28 × 0.9 — where does the decimal point go? (a) 0.0252 (b) 2.52 (c) 0.00252 (d) 0.252
  31. 31.0.48 × 0.7 — where does the decimal point go? (a) 3.36 (b) 0.336 (c) 0.0336 (d) 0.00336
  32. 32.2.2 × 9 — where does the decimal point go? (a) 19.8 (b) 198 (c) 0.198 (d) 1.98
  33. 33.7.7 × 34 — where does the decimal point go? (a) 2618 (b) 26.18 (c) 2.618 (d) 261.8
  34. 34.3.1 × 38 — where does the decimal point go? (a) 11.78 (b) 1178 (c) 1.178 (d) 117.8
  35. 35.0.73 × 0.3 — where does the decimal point go? (a) 0.00219 (b) 0.219 (c) 0.0219 (d) 2.19
  36. 36.0.31 × 27 — where does the decimal point go? (a) 8.37 (b) 0.0837 (c) 0.837 (d) 83.7
  37. 37.0.62 × 2 — where does the decimal point go? (a) 0.0124 (b) 0.124 (c) 12.4 (d) 1.24
  38. 38.7.6 × 1.6 — where does the decimal point go? (a) 12.16 (b) 121.6 (c) 1.216 (d) 0.1216
  39. 39.4.1 × 5 — where does the decimal point go? (a) 20.5 (b) 0.205 (c) 2.05 (d) 205
  40. 40.0.16 × 31 — where does the decimal point go? (a) 49.6 (b) 0.496 (c) 0.0496 (d) 4.96

Answer key

  1. 12.72
  2. 20.79
  3. 105.8
  4. 5.49
  5. 2.25
  6. 1.52
  7. 6.24
  8. 195.2
  9. 68.6
  10. 30.6
  11. 41.86
  12. 1.134
  13. 10.32
  14. 5.95
  15. 22.4
  16. 0.158
  17. 28.42
  18. 6.4
  19. 0.255
  20. 94.5
  21. 0.475
  22. 4.02
  23. 0.104
  24. 0.244
  25. 35.2
  26. 3.84
  27. 0.801
  28. 20.1
  29. 2.583
  30. 0.252
  31. 0.336
  32. 19.8
  33. 261.8
  34. 117.8
  35. 0.219
  36. 8.37
  37. 1.24
  38. 12.16
  39. 20.5
  40. 4.96

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