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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 922 · 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. 1.0.64 × 41 — where does the decimal point go? (a) 2.624 (b) 0.2624 (c) 262.4 (d) 26.24
  2. 2.0.38 × 7 — where does the decimal point go? (a) 26.6 (b) 0.266 (c) 2.66 (d) 0.0266
  3. 3.2.6 × 0.7 — where does the decimal point go? (a) 0.182 (b) 1.82 (c) 0.0182 (d) 18.2
  4. 4.8.3 × 17 — where does the decimal point go? (a) 141.1 (b) 1.411 (c) 14.11 (d) 1411
  5. 5.0.23 × 4.6 — where does the decimal point go? (a) 10.58 (b) 0.1058 (c) 1.058 (d) 0.01058
  6. 6.0.92 × 0.2 — where does the decimal point go? (a) 0.00184 (b) 0.184 (c) 0.0184 (d) 1.84
  7. 7.9.9 × 25 — where does the decimal point go? (a) 24.75 (b) 2.475 (c) 2475 (d) 247.5
  8. 8.3.4 × 0.9 — where does the decimal point go? (a) 0.0306 (b) 30.6 (c) 0.306 (d) 3.06
  9. 9.0.24 × 0.3 — where does the decimal point go? (a) 0.72 (b) 0.00072 (c) 0.0072 (d) 0.072
  10. 10.6.8 × 3.9 — where does the decimal point go? (a) 2.652 (b) 0.2652 (c) 26.52 (d) 265.2
  11. 11.0.63 × 8 — where does the decimal point go? (a) 0.0504 (b) 50.4 (c) 0.504 (d) 5.04
  12. 12.2.9 × 0.8 — where does the decimal point go? (a) 0.0232 (b) 23.2 (c) 2.32 (d) 0.232
  13. 13.2.6 × 33 — where does the decimal point go? (a) 85.8 (b) 858 (c) 0.858 (d) 8.58
  14. 14.0.67 × 9 — where does the decimal point go? (a) 60.3 (b) 0.0603 (c) 0.603 (d) 6.03
  15. 15.0.43 × 4.8 — where does the decimal point go? (a) 2.064 (b) 0.02064 (c) 20.64 (d) 0.2064
  16. 16.0.42 × 13 — where does the decimal point go? (a) 0.546 (b) 54.6 (c) 0.0546 (d) 5.46
  17. 17.0.43 × 4.6 — where does the decimal point go? (a) 19.78 (b) 1.978 (c) 0.1978 (d) 0.01978
  18. 18.3.8 × 43 — where does the decimal point go? (a) 1.634 (b) 16.34 (c) 163.4 (d) 1634
  19. 19.2.1 × 2.7 — where does the decimal point go? (a) 0.567 (b) 0.0567 (c) 5.67 (d) 56.7
  20. 20.0.28 × 0.3 — where does the decimal point go? (a) 0.0084 (b) 0.84 (c) 0.084 (d) 0.00084
  21. 21.3.3 × 4.2 — where does the decimal point go? (a) 13.86 (b) 0.1386 (c) 138.6 (d) 1.386
  22. 22.0.34 × 4 — where does the decimal point go? (a) 13.6 (b) 0.0136 (c) 1.36 (d) 0.136
  23. 23.0.52 × 9 — where does the decimal point go? (a) 0.468 (b) 4.68 (c) 46.8 (d) 0.0468
  24. 24.0.13 × 29 — where does the decimal point go? (a) 37.7 (b) 3.77 (c) 0.377 (d) 0.0377
  25. 25.1.7 × 1.7 — where does the decimal point go? (a) 28.9 (b) 0.289 (c) 0.0289 (d) 2.89
  26. 26.5.4 × 22 — where does the decimal point go? (a) 11.88 (b) 1.188 (c) 118.8 (d) 1188
  27. 27.2.4 × 0.3 — where does the decimal point go? (a) 7.2 (b) 0.072 (c) 0.0072 (d) 0.72
  28. 28.2.8 × 2.4 — where does the decimal point go? (a) 67.2 (b) 0.0672 (c) 6.72 (d) 0.672
  29. 29.0.57 × 0.5 — where does the decimal point go? (a) 0.00285 (b) 0.0285 (c) 0.285 (d) 2.85
  30. 30.8.2 × 2 — where does the decimal point go? (a) 1.64 (b) 0.164 (c) 164 (d) 16.4
  31. 31.6.4 × 3.2 — where does the decimal point go? (a) 2.048 (b) 0.2048 (c) 204.8 (d) 20.48
  32. 32.1.2 × 0.2 — where does the decimal point go? (a) 0.0024 (b) 0.024 (c) 0.24 (d) 2.4
  33. 33.5.6 × 3 — where does the decimal point go? (a) 16.8 (b) 1.68 (c) 0.168 (d) 168
  34. 34.9.4 × 2.4 — where does the decimal point go? (a) 0.2256 (b) 22.56 (c) 2.256 (d) 225.6
  35. 35.8.5 × 3 — where does the decimal point go? (a) 255 (b) 0.255 (c) 25.5 (d) 2.55
  36. 36.4.8 × 12 — where does the decimal point go? (a) 5.76 (b) 57.6 (c) 576 (d) 0.576
  37. 37.6.5 × 1.9 — where does the decimal point go? (a) 1.235 (b) 12.35 (c) 123.5 (d) 0.1235
  38. 38.5.5 × 5 — where does the decimal point go? (a) 27.5 (b) 275 (c) 0.275 (d) 2.75
  39. 39.7.6 × 4 — where does the decimal point go? (a) 3.04 (b) 30.4 (c) 0.304 (d) 304
  40. 40.0.89 × 0.8 — where does the decimal point go? (a) 0.0712 (b) 7.12 (c) 0.712 (d) 0.00712

Answer key

  1. 26.24
  2. 2.66
  3. 1.82
  4. 141.1
  5. 1.058
  6. 0.184
  7. 247.5
  8. 3.06
  9. 0.072
  10. 26.52
  11. 5.04
  12. 2.32
  13. 85.8
  14. 6.03
  15. 2.064
  16. 5.46
  17. 1.978
  18. 163.4
  19. 5.67
  20. 0.084
  21. 13.86
  22. 1.36
  23. 4.68
  24. 3.77
  25. 2.89
  26. 118.8
  27. 0.72
  28. 6.72
  29. 0.285
  30. 16.4
  31. 20.48
  32. 0.24
  33. 16.8
  34. 22.56
  35. 25.5
  36. 57.6
  37. 12.35
  38. 27.5
  39. 30.4
  40. 0.712

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