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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 298 · 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. 1.0.26 × 11 — where does the decimal point go? (a) 0.286 (b) 28.6 (c) 2.86 (d) 0.0286
  2. 2.0.95 × 9 — where does the decimal point go? (a) 0.0855 (b) 85.5 (c) 0.855 (d) 8.55
  3. 3.0.76 × 27 — where does the decimal point go? (a) 205.2 (b) 20.52 (c) 0.2052 (d) 2.052
  4. 4.0.61 × 0.7 — where does the decimal point go? (a) 4.27 (b) 0.427 (c) 0.0427 (d) 0.00427
  5. 5.7.5 × 0.7 — where does the decimal point go? (a) 0.525 (b) 52.5 (c) 0.0525 (d) 5.25
  6. 6.0.99 × 12 — where does the decimal point go? (a) 0.1188 (b) 118.8 (c) 1.188 (d) 11.88
  7. 7.6.1 × 7 — where does the decimal point go? (a) 42.7 (b) 0.427 (c) 427 (d) 4.27
  8. 8.0.63 × 3.3 — where does the decimal point go? (a) 2.079 (b) 0.2079 (c) 0.02079 (d) 20.79
  9. 9.7.7 × 0.2 — where does the decimal point go? (a) 1.54 (b) 0.154 (c) 15.4 (d) 0.0154
  10. 10.6.6 × 31 — where does the decimal point go? (a) 204.6 (b) 2046 (c) 2.046 (d) 20.46
  11. 11.8.5 × 43 — where does the decimal point go? (a) 365.5 (b) 36.55 (c) 3655 (d) 3.655
  12. 12.5.4 × 19 — where does the decimal point go? (a) 10.26 (b) 1.026 (c) 102.6 (d) 1026
  13. 13.0.13 × 6 — where does the decimal point go? (a) 0.0078 (b) 7.8 (c) 0.078 (d) 0.78
  14. 14.0.87 × 0.4 — where does the decimal point go? (a) 0.0348 (b) 3.48 (c) 0.348 (d) 0.00348
  15. 15.0.52 × 12 — where does the decimal point go? (a) 6.24 (b) 62.4 (c) 0.0624 (d) 0.624
  16. 16.0.86 × 0.8 — where does the decimal point go? (a) 0.00688 (b) 0.0688 (c) 0.688 (d) 6.88
  17. 17.7.7 × 8 — where does the decimal point go? (a) 6.16 (b) 61.6 (c) 616 (d) 0.616
  18. 18.8.6 × 0.4 — where does the decimal point go? (a) 34.4 (b) 0.344 (c) 0.0344 (d) 3.44
  19. 19.0.24 × 1.6 — where does the decimal point go? (a) 3.84 (b) 0.384 (c) 0.00384 (d) 0.0384
  20. 20.9.2 × 17 — where does the decimal point go? (a) 1564 (b) 1.564 (c) 15.64 (d) 156.4
  21. 21.0.93 × 4.5 — where does the decimal point go? (a) 0.4185 (b) 0.04185 (c) 41.85 (d) 4.185
  22. 22.8.9 × 6 — where does the decimal point go? (a) 5.34 (b) 534 (c) 53.4 (d) 0.534
  23. 23.2.1 × 0.6 — where does the decimal point go? (a) 12.6 (b) 0.0126 (c) 1.26 (d) 0.126
  24. 24.8.3 × 0.5 — where does the decimal point go? (a) 4.15 (b) 0.415 (c) 41.5 (d) 0.0415
  25. 25.0.53 × 3.1 — where does the decimal point go? (a) 0.1643 (b) 0.01643 (c) 1.643 (d) 16.43
  26. 26.1.9 × 49 — where does the decimal point go? (a) 0.931 (b) 9.31 (c) 93.1 (d) 931
  27. 27.6.8 × 4 — where does the decimal point go? (a) 0.272 (b) 27.2 (c) 272 (d) 2.72
  28. 28.2.3 × 9 — where does the decimal point go? (a) 20.7 (b) 207 (c) 0.207 (d) 2.07
  29. 29.4.3 × 0.7 — where does the decimal point go? (a) 0.0301 (b) 0.301 (c) 3.01 (d) 30.1
  30. 30.4.3 × 11 — where does the decimal point go? (a) 4.73 (b) 473 (c) 0.473 (d) 47.3
  31. 31.5.1 × 4.2 — where does the decimal point go? (a) 214.2 (b) 21.42 (c) 2.142 (d) 0.2142
  32. 32.8.6 × 1.1 — where does the decimal point go? (a) 0.946 (b) 0.0946 (c) 94.6 (d) 9.46
  33. 33.0.38 × 0.2 — where does the decimal point go? (a) 0.0076 (b) 0.00076 (c) 0.076 (d) 0.76
  34. 34.6.9 × 36 — where does the decimal point go? (a) 2.484 (b) 2484 (c) 24.84 (d) 248.4
  35. 35.0.48 × 42 — where does the decimal point go? (a) 20.16 (b) 2.016 (c) 201.6 (d) 0.2016
  36. 36.0.92 × 2.8 — where does the decimal point go? (a) 25.76 (b) 2.576 (c) 0.02576 (d) 0.2576
  37. 37.1.8 × 6 — where does the decimal point go? (a) 10.8 (b) 108 (c) 1.08 (d) 0.108
  38. 38.0.68 × 4.2 — where does the decimal point go? (a) 2.856 (b) 28.56 (c) 0.02856 (d) 0.2856
  39. 39.0.34 × 24 — where does the decimal point go? (a) 0.816 (b) 81.6 (c) 0.0816 (d) 8.16
  40. 40.9.1 × 1.2 — where does the decimal point go? (a) 1.092 (b) 0.1092 (c) 10.92 (d) 109.2

Answer key

  1. 2.86
  2. 8.55
  3. 20.52
  4. 0.427
  5. 5.25
  6. 11.88
  7. 42.7
  8. 2.079
  9. 1.54
  10. 204.6
  11. 365.5
  12. 102.6
  13. 0.78
  14. 0.348
  15. 6.24
  16. 0.688
  17. 61.6
  18. 3.44
  19. 0.384
  20. 156.4
  21. 4.185
  22. 53.4
  23. 1.26
  24. 4.15
  25. 1.643
  26. 93.1
  27. 27.2
  28. 20.7
  29. 3.01
  30. 47.3
  31. 21.42
  32. 9.46
  33. 0.076
  34. 248.4
  35. 20.16
  36. 2.576
  37. 10.8
  38. 2.856
  39. 8.16
  40. 10.92

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