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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 687 · 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 × 14 — where does the decimal point go? (a) 137.2 (b) 1.372 (c) 1372 (d) 13.72
  2. 2.4.6 × 1.7 — where does the decimal point go? (a) 7.82 (b) 0.782 (c) 0.0782 (d) 78.2
  3. 3.0.89 × 3 — where does the decimal point go? (a) 2.67 (b) 0.0267 (c) 26.7 (d) 0.267
  4. 4.7.4 × 0.7 — where does the decimal point go? (a) 0.518 (b) 51.8 (c) 0.0518 (d) 5.18
  5. 5.0.91 × 0.2 — where does the decimal point go? (a) 0.00182 (b) 0.182 (c) 0.0182 (d) 1.82
  6. 6.0.67 × 0.2 — where does the decimal point go? (a) 0.00134 (b) 0.0134 (c) 1.34 (d) 0.134
  7. 7.7.3 × 2 — where does the decimal point go? (a) 1.46 (b) 146 (c) 14.6 (d) 0.146
  8. 8.3.9 × 2 — where does the decimal point go? (a) 0.78 (b) 7.8 (c) 0.078 (d) 78
  9. 9.9.7 × 26 — where does the decimal point go? (a) 252.2 (b) 25.22 (c) 2522 (d) 2.522
  10. 10.8.1 × 17 — where does the decimal point go? (a) 1377 (b) 1.377 (c) 137.7 (d) 13.77
  11. 11.6.2 × 14 — where does the decimal point go? (a) 8.68 (b) 868 (c) 86.8 (d) 0.868
  12. 12.0.19 × 0.5 — where does the decimal point go? (a) 0.095 (b) 0.0095 (c) 0.00095 (d) 0.95
  13. 13.7.6 × 0.7 — where does the decimal point go? (a) 53.2 (b) 0.0532 (c) 5.32 (d) 0.532
  14. 14.0.93 × 36 — where does the decimal point go? (a) 3.348 (b) 334.8 (c) 0.3348 (d) 33.48
  15. 15.4.2 × 0.9 — where does the decimal point go? (a) 0.378 (b) 0.0378 (c) 37.8 (d) 3.78
  16. 16.0.44 × 1.4 — where does the decimal point go? (a) 0.00616 (b) 6.16 (c) 0.0616 (d) 0.616
  17. 17.0.36 × 38 — where does the decimal point go? (a) 13.68 (b) 1.368 (c) 136.8 (d) 0.1368
  18. 18.7.3 × 2.2 — where does the decimal point go? (a) 0.1606 (b) 160.6 (c) 16.06 (d) 1.606
  19. 19.8.1 × 1.7 — where does the decimal point go? (a) 137.7 (b) 0.1377 (c) 13.77 (d) 1.377
  20. 20.2.3 × 4 — where does the decimal point go? (a) 9.2 (b) 0.92 (c) 0.092 (d) 92
  21. 21.0.84 × 4.3 — where does the decimal point go? (a) 3.612 (b) 36.12 (c) 0.3612 (d) 0.03612
  22. 22.8.8 × 6 — where does the decimal point go? (a) 5.28 (b) 0.528 (c) 528 (d) 52.8
  23. 23.0.16 × 0.7 — where does the decimal point go? (a) 0.112 (b) 1.12 (c) 0.0112 (d) 0.00112
  24. 24.0.59 × 3 — where does the decimal point go? (a) 17.7 (b) 0.0177 (c) 0.177 (d) 1.77
  25. 25.5.6 × 19 — where does the decimal point go? (a) 10.64 (b) 1064 (c) 1.064 (d) 106.4
  26. 26.0.74 × 4.6 — where does the decimal point go? (a) 34.04 (b) 0.3404 (c) 0.03404 (d) 3.404
  27. 27.0.49 × 44 — where does the decimal point go? (a) 21.56 (b) 2.156 (c) 215.6 (d) 0.2156
  28. 28.1.7 × 5 — where does the decimal point go? (a) 85 (b) 0.085 (c) 0.85 (d) 8.5
  29. 29.0.22 × 0.7 — where does the decimal point go? (a) 0.154 (b) 1.54 (c) 0.00154 (d) 0.0154
  30. 30.1.4 × 26 — where does the decimal point go? (a) 36.4 (b) 364 (c) 0.364 (d) 3.64
  31. 31.0.69 × 0.2 — where does the decimal point go? (a) 0.0138 (b) 0.138 (c) 1.38 (d) 0.00138
  32. 32.0.58 × 3.6 — where does the decimal point go? (a) 2.088 (b) 20.88 (c) 0.02088 (d) 0.2088
  33. 33.7.1 × 5 — where does the decimal point go? (a) 0.355 (b) 35.5 (c) 3.55 (d) 355
  34. 34.1.3 × 0.9 — where does the decimal point go? (a) 11.7 (b) 0.117 (c) 1.17 (d) 0.0117
  35. 35.0.71 × 19 — where does the decimal point go? (a) 13.49 (b) 134.9 (c) 1.349 (d) 0.1349
  36. 36.0.26 × 1.2 — where does the decimal point go? (a) 0.0312 (b) 0.00312 (c) 0.312 (d) 3.12
  37. 37.0.12 × 6 — where does the decimal point go? (a) 0.072 (b) 0.0072 (c) 7.2 (d) 0.72
  38. 38.8.1 × 0.5 — where does the decimal point go? (a) 4.05 (b) 0.0405 (c) 40.5 (d) 0.405
  39. 39.0.48 × 4 — where does the decimal point go? (a) 0.0192 (b) 19.2 (c) 0.192 (d) 1.92
  40. 40.0.84 × 3.1 — where does the decimal point go? (a) 26.04 (b) 0.2604 (c) 2.604 (d) 0.02604

Answer key

  1. 137.2
  2. 7.82
  3. 2.67
  4. 5.18
  5. 0.182
  6. 0.134
  7. 14.6
  8. 7.8
  9. 252.2
  10. 137.7
  11. 86.8
  12. 0.095
  13. 5.32
  14. 33.48
  15. 3.78
  16. 0.616
  17. 13.68
  18. 16.06
  19. 13.77
  20. 9.2
  21. 3.612
  22. 52.8
  23. 0.112
  24. 1.77
  25. 106.4
  26. 3.404
  27. 21.56
  28. 8.5
  29. 0.154
  30. 36.4
  31. 0.138
  32. 2.088
  33. 35.5
  34. 1.17
  35. 13.49
  36. 0.312
  37. 0.72
  38. 4.05
  39. 1.92
  40. 2.604

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