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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 131 · 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. 1.0.44 × 1.2 — where does the decimal point go? (a) 0.00528 (b) 0.528 (c) 5.28 (d) 0.0528
  2. 2.1.4 × 3 — where does the decimal point go? (a) 42 (b) 4.2 (c) 0.042 (d) 0.42
  3. 3.2.6 × 19 — where does the decimal point go? (a) 4.94 (b) 49.4 (c) 0.494 (d) 494
  4. 4.0.85 × 29 — where does the decimal point go? (a) 0.2465 (b) 24.65 (c) 2.465 (d) 246.5
  5. 5.0.45 × 7 — where does the decimal point go? (a) 0.315 (b) 3.15 (c) 0.0315 (d) 31.5
  6. 6.0.58 × 1.1 — where does the decimal point go? (a) 0.638 (b) 0.0638 (c) 6.38 (d) 0.00638
  7. 7.5.7 × 0.3 — where does the decimal point go? (a) 0.0171 (b) 1.71 (c) 0.171 (d) 17.1
  8. 8.1.6 × 9 — where does the decimal point go? (a) 14.4 (b) 1.44 (c) 0.144 (d) 144
  9. 9.0.81 × 42 — where does the decimal point go? (a) 3.402 (b) 0.3402 (c) 340.2 (d) 34.02
  10. 10.0.15 × 5 — where does the decimal point go? (a) 0.075 (b) 7.5 (c) 0.75 (d) 0.0075
  11. 11.0.49 × 2.8 — where does the decimal point go? (a) 13.72 (b) 1.372 (c) 0.01372 (d) 0.1372
  12. 12.3.8 × 42 — where does the decimal point go? (a) 1596 (b) 159.6 (c) 1.596 (d) 15.96
  13. 13.4.7 × 0.8 — where does the decimal point go? (a) 3.76 (b) 0.0376 (c) 0.376 (d) 37.6
  14. 14.1.8 × 7 — where does the decimal point go? (a) 0.126 (b) 12.6 (c) 1.26 (d) 126
  15. 15.9.2 × 2.2 — where does the decimal point go? (a) 0.2024 (b) 202.4 (c) 2.024 (d) 20.24
  16. 16.1.9 × 0.4 — where does the decimal point go? (a) 0.0076 (b) 7.6 (c) 0.76 (d) 0.076
  17. 17.6.3 × 9 — where does the decimal point go? (a) 5.67 (b) 56.7 (c) 0.567 (d) 567
  18. 18.0.12 × 9 — where does the decimal point go? (a) 10.8 (b) 0.0108 (c) 1.08 (d) 0.108
  19. 19.0.73 × 0.8 — where does the decimal point go? (a) 0.00584 (b) 0.584 (c) 0.0584 (d) 5.84
  20. 20.1.4 × 6 — where does the decimal point go? (a) 8.4 (b) 84 (c) 0.84 (d) 0.084
  21. 21.2.8 × 2.2 — where does the decimal point go? (a) 0.0616 (b) 6.16 (c) 0.616 (d) 61.6
  22. 22.0.77 × 0.5 — where does the decimal point go? (a) 0.385 (b) 0.00385 (c) 3.85 (d) 0.0385
  23. 23.3.1 × 3.8 — where does the decimal point go? (a) 0.1178 (b) 1.178 (c) 117.8 (d) 11.78
  24. 24.0.34 × 42 — where does the decimal point go? (a) 142.8 (b) 1.428 (c) 14.28 (d) 0.1428
  25. 25.3.7 × 0.3 — where does the decimal point go? (a) 0.111 (b) 0.0111 (c) 1.11 (d) 11.1
  26. 26.0.42 × 0.8 — where does the decimal point go? (a) 0.0336 (b) 0.00336 (c) 0.336 (d) 3.36
  27. 27.0.37 × 8 — where does the decimal point go? (a) 2.96 (b) 0.296 (c) 0.0296 (d) 29.6
  28. 28.2.8 × 0.9 — where does the decimal point go? (a) 0.252 (b) 25.2 (c) 2.52 (d) 0.0252
  29. 29.0.13 × 14 — where does the decimal point go? (a) 0.0182 (b) 1.82 (c) 0.182 (d) 18.2
  30. 30.2.5 × 35 — where does the decimal point go? (a) 8.75 (b) 875 (c) 0.875 (d) 87.5
  31. 31.2.2 × 1.6 — where does the decimal point go? (a) 0.0352 (b) 0.352 (c) 3.52 (d) 35.2
  32. 32.0.17 × 0.2 — where does the decimal point go? (a) 0.00034 (b) 0.34 (c) 0.034 (d) 0.0034
  33. 33.0.34 × 6 — where does the decimal point go? (a) 2.04 (b) 20.4 (c) 0.204 (d) 0.0204
  34. 34.0.44 × 3.4 — where does the decimal point go? (a) 1.496 (b) 0.1496 (c) 0.01496 (d) 14.96
  35. 35.0.28 × 2.2 — where does the decimal point go? (a) 6.16 (b) 0.00616 (c) 0.616 (d) 0.0616
  36. 36.3.5 × 2.7 — where does the decimal point go? (a) 0.0945 (b) 94.5 (c) 9.45 (d) 0.945
  37. 37.0.97 × 3 — where does the decimal point go? (a) 0.291 (b) 29.1 (c) 2.91 (d) 0.0291
  38. 38.0.81 × 4 — where does the decimal point go? (a) 0.0324 (b) 0.324 (c) 3.24 (d) 32.4
  39. 39.0.23 × 0.4 — where does the decimal point go? (a) 0.92 (b) 0.092 (c) 0.0092 (d) 0.00092
  40. 40.9.7 × 26 — where does the decimal point go? (a) 25.22 (b) 252.2 (c) 2522 (d) 2.522

Answer key

  1. 0.528
  2. 4.2
  3. 49.4
  4. 24.65
  5. 3.15
  6. 0.638
  7. 1.71
  8. 14.4
  9. 34.02
  10. 0.75
  11. 1.372
  12. 159.6
  13. 3.76
  14. 12.6
  15. 20.24
  16. 0.76
  17. 56.7
  18. 1.08
  19. 0.584
  20. 8.4
  21. 6.16
  22. 0.385
  23. 11.78
  24. 14.28
  25. 1.11
  26. 0.336
  27. 2.96
  28. 2.52
  29. 1.82
  30. 87.5
  31. 3.52
  32. 0.034
  33. 2.04
  34. 1.496
  35. 0.616
  36. 9.45
  37. 2.91
  38. 3.24
  39. 0.092
  40. 252.2

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