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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 529 · 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. 1.9.8 × 0.7 — where does the decimal point go? (a) 0.686 (b) 6.86 (c) 68.6 (d) 0.0686
  2. 2.5.7 × 0.5 — where does the decimal point go? (a) 0.285 (b) 28.5 (c) 2.85 (d) 0.0285
  3. 3.0.72 × 9 — where does the decimal point go? (a) 64.8 (b) 0.0648 (c) 0.648 (d) 6.48
  4. 4.4.7 × 1.3 — where does the decimal point go? (a) 0.611 (b) 0.0611 (c) 6.11 (d) 61.1
  5. 5.0.26 × 0.6 — where does the decimal point go? (a) 1.56 (b) 0.0156 (c) 0.00156 (d) 0.156
  6. 6.0.89 × 0.4 — where does the decimal point go? (a) 3.56 (b) 0.00356 (c) 0.0356 (d) 0.356
  7. 7.0.57 × 0.9 — where does the decimal point go? (a) 0.513 (b) 5.13 (c) 0.00513 (d) 0.0513
  8. 8.0.18 × 0.8 — where does the decimal point go? (a) 0.00144 (b) 0.144 (c) 1.44 (d) 0.0144
  9. 9.2.8 × 0.6 — where does the decimal point go? (a) 16.8 (b) 0.0168 (c) 0.168 (d) 1.68
  10. 10.0.23 × 8 — where does the decimal point go? (a) 0.184 (b) 18.4 (c) 0.0184 (d) 1.84
  11. 11.0.36 × 8 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 28.8 (d) 0.0288
  12. 12.0.56 × 21 — where does the decimal point go? (a) 11.76 (b) 117.6 (c) 1.176 (d) 0.1176
  13. 13.5.8 × 7 — where does the decimal point go? (a) 40.6 (b) 4.06 (c) 0.406 (d) 406
  14. 14.0.43 × 2.5 — where does the decimal point go? (a) 0.1075 (b) 10.75 (c) 0.01075 (d) 1.075
  15. 15.7.2 × 2.7 — where does the decimal point go? (a) 19.44 (b) 194.4 (c) 1.944 (d) 0.1944
  16. 16.5.5 × 0.5 — where does the decimal point go? (a) 0.0275 (b) 0.275 (c) 2.75 (d) 27.5
  17. 17.4.8 × 21 — where does the decimal point go? (a) 100.8 (b) 1008 (c) 10.08 (d) 1.008
  18. 18.0.67 × 0.7 — where does the decimal point go? (a) 0.00469 (b) 0.0469 (c) 4.69 (d) 0.469
  19. 19.0.53 × 32 — where does the decimal point go? (a) 169.6 (b) 1.696 (c) 16.96 (d) 0.1696
  20. 20.6.6 × 2 — where does the decimal point go? (a) 1.32 (b) 132 (c) 0.132 (d) 13.2
  21. 21.0.81 × 9 — where does the decimal point go? (a) 72.9 (b) 7.29 (c) 0.0729 (d) 0.729
  22. 22.0.78 × 3 — where does the decimal point go? (a) 0.234 (b) 23.4 (c) 0.0234 (d) 2.34
  23. 23.0.58 × 41 — where does the decimal point go? (a) 0.2378 (b) 23.78 (c) 237.8 (d) 2.378
  24. 24.0.89 × 4 — where does the decimal point go? (a) 0.0356 (b) 0.356 (c) 35.6 (d) 3.56
  25. 25.2.5 × 5 — where does the decimal point go? (a) 12.5 (b) 0.125 (c) 125 (d) 1.25
  26. 26.0.59 × 4.2 — where does the decimal point go? (a) 0.02478 (b) 0.2478 (c) 24.78 (d) 2.478
  27. 27.0.37 × 7 — where does the decimal point go? (a) 2.59 (b) 0.259 (c) 25.9 (d) 0.0259
  28. 28.0.19 × 9 — where does the decimal point go? (a) 0.171 (b) 0.0171 (c) 1.71 (d) 17.1
  29. 29.6.8 × 3.2 — where does the decimal point go? (a) 2.176 (b) 21.76 (c) 0.2176 (d) 217.6
  30. 30.4.2 × 2.4 — where does the decimal point go? (a) 1.008 (b) 100.8 (c) 10.08 (d) 0.1008
  31. 31.2.9 × 6 — where does the decimal point go? (a) 174 (b) 17.4 (c) 1.74 (d) 0.174
  32. 32.0.25 × 47 — where does the decimal point go? (a) 11.75 (b) 117.5 (c) 1.175 (d) 0.1175
  33. 33.0.25 × 0.7 — where does the decimal point go? (a) 0.00175 (b) 0.0175 (c) 0.175 (d) 1.75
  34. 34.6.7 × 2.7 — where does the decimal point go? (a) 0.1809 (b) 1.809 (c) 18.09 (d) 180.9
  35. 35.2.9 × 46 — where does the decimal point go? (a) 133.4 (b) 13.34 (c) 1334 (d) 1.334
  36. 36.0.12 × 3 — where does the decimal point go? (a) 3.6 (b) 0.0036 (c) 0.36 (d) 0.036
  37. 37.0.97 × 5 — where does the decimal point go? (a) 48.5 (b) 4.85 (c) 0.485 (d) 0.0485
  38. 38.0.48 × 0.6 — where does the decimal point go? (a) 0.0288 (b) 0.288 (c) 0.00288 (d) 2.88
  39. 39.4.8 × 2.6 — where does the decimal point go? (a) 12.48 (b) 0.1248 (c) 1.248 (d) 124.8
  40. 40.2.7 × 0.5 — where does the decimal point go? (a) 0.0135 (b) 13.5 (c) 1.35 (d) 0.135

Answer key

  1. 6.86
  2. 2.85
  3. 6.48
  4. 6.11
  5. 0.156
  6. 0.356
  7. 0.513
  8. 0.144
  9. 1.68
  10. 1.84
  11. 2.88
  12. 11.76
  13. 40.6
  14. 1.075
  15. 19.44
  16. 2.75
  17. 100.8
  18. 0.469
  19. 16.96
  20. 13.2
  21. 7.29
  22. 2.34
  23. 23.78
  24. 3.56
  25. 12.5
  26. 2.478
  27. 2.59
  28. 1.71
  29. 21.76
  30. 10.08
  31. 17.4
  32. 11.75
  33. 0.175
  34. 18.09
  35. 133.4
  36. 0.36
  37. 4.85
  38. 0.288
  39. 12.48
  40. 1.35

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