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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 888 · 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. 1.4.4 × 29 — where does the decimal point go? (a) 12.76 (b) 1.276 (c) 127.6 (d) 1276
  2. 2.0.52 × 0.9 — where does the decimal point go? (a) 0.468 (b) 4.68 (c) 0.00468 (d) 0.0468
  3. 3.8.9 × 6 — where does the decimal point go? (a) 534 (b) 0.534 (c) 5.34 (d) 53.4
  4. 4.1.7 × 12 — where does the decimal point go? (a) 2.04 (b) 0.204 (c) 204 (d) 20.4
  5. 5.6.1 × 6 — where does the decimal point go? (a) 3.66 (b) 366 (c) 36.6 (d) 0.366
  6. 6.0.14 × 1.2 — where does the decimal point go? (a) 0.0168 (b) 0.00168 (c) 0.168 (d) 1.68
  7. 7.1.4 × 39 — where does the decimal point go? (a) 0.546 (b) 5.46 (c) 54.6 (d) 546
  8. 8.2.1 × 3.2 — where does the decimal point go? (a) 0.0672 (b) 6.72 (c) 0.672 (d) 67.2
  9. 9.0.69 × 25 — where does the decimal point go? (a) 0.1725 (b) 17.25 (c) 172.5 (d) 1.725
  10. 10.0.72 × 3 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 21.6 (d) 0.0216
  11. 11.0.19 × 3 — where does the decimal point go? (a) 0.57 (b) 5.7 (c) 0.057 (d) 0.0057
  12. 12.5.6 × 7 — where does the decimal point go? (a) 3.92 (b) 392 (c) 39.2 (d) 0.392
  13. 13.0.29 × 2 — where does the decimal point go? (a) 0.058 (b) 0.0058 (c) 5.8 (d) 0.58
  14. 14.0.76 × 0.6 — where does the decimal point go? (a) 0.00456 (b) 0.0456 (c) 0.456 (d) 4.56
  15. 15.2.3 × 3 — where does the decimal point go? (a) 0.69 (b) 0.069 (c) 69 (d) 6.9
  16. 16.0.12 × 9 — where does the decimal point go? (a) 0.0108 (b) 0.108 (c) 10.8 (d) 1.08
  17. 17.7.4 × 3 — where does the decimal point go? (a) 222 (b) 2.22 (c) 22.2 (d) 0.222
  18. 18.3.4 × 1.8 — where does the decimal point go? (a) 61.2 (b) 0.0612 (c) 0.612 (d) 6.12
  19. 19.7.7 × 1.7 — where does the decimal point go? (a) 130.9 (b) 0.1309 (c) 13.09 (d) 1.309
  20. 20.4.9 × 14 — where does the decimal point go? (a) 0.686 (b) 686 (c) 6.86 (d) 68.6
  21. 21.8.7 × 1.7 — where does the decimal point go? (a) 147.9 (b) 1.479 (c) 14.79 (d) 0.1479
  22. 22.2.3 × 45 — where does the decimal point go? (a) 1035 (b) 10.35 (c) 103.5 (d) 1.035
  23. 23.2.5 × 4.5 — where does the decimal point go? (a) 0.1125 (b) 1.125 (c) 11.25 (d) 112.5
  24. 24.0.99 × 6 — where does the decimal point go? (a) 0.594 (b) 59.4 (c) 5.94 (d) 0.0594
  25. 25.2.4 × 0.7 — where does the decimal point go? (a) 0.168 (b) 16.8 (c) 0.0168 (d) 1.68
  26. 26.0.96 × 0.3 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 0.00288 (d) 0.0288
  27. 27.0.28 × 49 — where does the decimal point go? (a) 13.72 (b) 137.2 (c) 1.372 (d) 0.1372
  28. 28.0.21 × 0.3 — where does the decimal point go? (a) 0.00063 (b) 0.0063 (c) 0.63 (d) 0.063
  29. 29.1.9 × 4.9 — where does the decimal point go? (a) 0.0931 (b) 0.931 (c) 9.31 (d) 93.1
  30. 30.0.69 × 3.6 — where does the decimal point go? (a) 0.2484 (b) 0.02484 (c) 24.84 (d) 2.484
  31. 31.9.1 × 3.2 — where does the decimal point go? (a) 2.912 (b) 0.2912 (c) 29.12 (d) 291.2
  32. 32.7.2 × 11 — where does the decimal point go? (a) 7.92 (b) 79.2 (c) 792 (d) 0.792
  33. 33.3.7 × 8 — where does the decimal point go? (a) 29.6 (b) 0.296 (c) 296 (d) 2.96
  34. 34.4.4 × 1.4 — where does the decimal point go? (a) 0.616 (b) 0.0616 (c) 61.6 (d) 6.16
  35. 35.1.3 × 0.3 — where does the decimal point go? (a) 3.9 (b) 0.039 (c) 0.39 (d) 0.0039
  36. 36.0.42 × 3 — where does the decimal point go? (a) 1.26 (b) 0.0126 (c) 0.126 (d) 12.6
  37. 37.0.58 × 3.9 — where does the decimal point go? (a) 0.02262 (b) 2.262 (c) 0.2262 (d) 22.62
  38. 38.0.36 × 11 — where does the decimal point go? (a) 0.396 (b) 3.96 (c) 0.0396 (d) 39.6
  39. 39.8.8 × 0.4 — where does the decimal point go? (a) 35.2 (b) 3.52 (c) 0.352 (d) 0.0352
  40. 40.0.21 × 0.2 — where does the decimal point go? (a) 0.042 (b) 0.0042 (c) 0.42 (d) 0.00042

Answer key

  1. 127.6
  2. 0.468
  3. 53.4
  4. 20.4
  5. 36.6
  6. 0.168
  7. 54.6
  8. 6.72
  9. 17.25
  10. 2.16
  11. 0.57
  12. 39.2
  13. 0.58
  14. 0.456
  15. 6.9
  16. 1.08
  17. 22.2
  18. 6.12
  19. 13.09
  20. 68.6
  21. 14.79
  22. 103.5
  23. 11.25
  24. 5.94
  25. 1.68
  26. 0.288
  27. 13.72
  28. 0.063
  29. 9.31
  30. 2.484
  31. 29.12
  32. 79.2
  33. 29.6
  34. 6.16
  35. 0.39
  36. 1.26
  37. 2.262
  38. 3.96
  39. 3.52
  40. 0.042

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