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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 113 · 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. 1.3.3 × 49 — where does the decimal point go? (a) 16.17 (b) 161.7 (c) 1617 (d) 1.617
  2. 2.0.64 × 13 — where does the decimal point go? (a) 0.0832 (b) 0.832 (c) 8.32 (d) 83.2
  3. 3.9.8 × 7 — where does the decimal point go? (a) 686 (b) 0.686 (c) 6.86 (d) 68.6
  4. 4.4.7 × 0.3 — where does the decimal point go? (a) 14.1 (b) 0.0141 (c) 0.141 (d) 1.41
  5. 5.7.4 × 0.7 — where does the decimal point go? (a) 0.0518 (b) 51.8 (c) 0.518 (d) 5.18
  6. 6.0.15 × 0.7 — where does the decimal point go? (a) 0.00105 (b) 0.0105 (c) 0.105 (d) 1.05
  7. 7.4.8 × 2.2 — where does the decimal point go? (a) 1.056 (b) 0.1056 (c) 10.56 (d) 105.6
  8. 8.1.4 × 0.3 — where does the decimal point go? (a) 0.042 (b) 0.0042 (c) 4.2 (d) 0.42
  9. 9.7.8 × 7 — where does the decimal point go? (a) 546 (b) 54.6 (c) 0.546 (d) 5.46
  10. 10.1.4 × 0.4 — where does the decimal point go? (a) 0.056 (b) 5.6 (c) 0.0056 (d) 0.56
  11. 11.9.1 × 2.4 — where does the decimal point go? (a) 21.84 (b) 2.184 (c) 0.2184 (d) 218.4
  12. 12.2.9 × 7 — where does the decimal point go? (a) 20.3 (b) 203 (c) 2.03 (d) 0.203
  13. 13.4.9 × 26 — where does the decimal point go? (a) 1274 (b) 12.74 (c) 127.4 (d) 1.274
  14. 14.0.32 × 4 — where does the decimal point go? (a) 0.0128 (b) 0.128 (c) 1.28 (d) 12.8
  15. 15.0.38 × 4.7 — where does the decimal point go? (a) 0.1786 (b) 1.786 (c) 0.01786 (d) 17.86
  16. 16.6.9 × 18 — where does the decimal point go? (a) 1.242 (b) 12.42 (c) 124.2 (d) 1242
  17. 17.0.99 × 0.5 — where does the decimal point go? (a) 0.0495 (b) 4.95 (c) 0.00495 (d) 0.495
  18. 18.0.25 × 4.5 — where does the decimal point go? (a) 11.25 (b) 1.125 (c) 0.1125 (d) 0.01125
  19. 19.9.1 × 18 — where does the decimal point go? (a) 163.8 (b) 16.38 (c) 1.638 (d) 1638
  20. 20.0.99 × 9 — where does the decimal point go? (a) 0.891 (b) 89.1 (c) 0.0891 (d) 8.91
  21. 21.9.9 × 9 — where does the decimal point go? (a) 8.91 (b) 0.891 (c) 891 (d) 89.1
  22. 22.4.9 × 3.2 — where does the decimal point go? (a) 15.68 (b) 0.1568 (c) 1.568 (d) 156.8
  23. 23.5.3 × 9 — where does the decimal point go? (a) 47.7 (b) 4.77 (c) 0.477 (d) 477
  24. 24.2.2 × 0.8 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 0.0176 (d) 17.6
  25. 25.0.92 × 3.3 — where does the decimal point go? (a) 0.03036 (b) 30.36 (c) 3.036 (d) 0.3036
  26. 26.0.26 × 1.3 — where does the decimal point go? (a) 0.0338 (b) 0.00338 (c) 3.38 (d) 0.338
  27. 27.0.68 × 9 — where does the decimal point go? (a) 61.2 (b) 0.612 (c) 0.0612 (d) 6.12
  28. 28.0.53 × 2 — where does the decimal point go? (a) 1.06 (b) 0.0106 (c) 0.106 (d) 10.6
  29. 29.0.37 × 0.8 — where does the decimal point go? (a) 0.296 (b) 0.0296 (c) 0.00296 (d) 2.96
  30. 30.0.81 × 7 — where does the decimal point go? (a) 56.7 (b) 5.67 (c) 0.0567 (d) 0.567
  31. 31.5.6 × 0.3 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 16.8 (d) 0.0168
  32. 32.1.5 × 3 — where does the decimal point go? (a) 4.5 (b) 0.045 (c) 0.45 (d) 45
  33. 33.5.5 × 0.3 — where does the decimal point go? (a) 0.0165 (b) 1.65 (c) 0.165 (d) 16.5
  34. 34.0.64 × 18 — where does the decimal point go? (a) 11.52 (b) 1.152 (c) 0.1152 (d) 115.2
  35. 35.0.41 × 3.6 — where does the decimal point go? (a) 0.1476 (b) 0.01476 (c) 14.76 (d) 1.476
  36. 36.3.5 × 1.5 — where does the decimal point go? (a) 5.25 (b) 52.5 (c) 0.525 (d) 0.0525
  37. 37.7.1 × 35 — where does the decimal point go? (a) 24.85 (b) 248.5 (c) 2485 (d) 2.485
  38. 38.2.6 × 0.9 — where does the decimal point go? (a) 0.0234 (b) 0.234 (c) 2.34 (d) 23.4
  39. 39.0.16 × 26 — where does the decimal point go? (a) 4.16 (b) 0.416 (c) 41.6 (d) 0.0416
  40. 40.3.4 × 9 — where does the decimal point go? (a) 30.6 (b) 3.06 (c) 306 (d) 0.306

Answer key

  1. 161.7
  2. 8.32
  3. 68.6
  4. 1.41
  5. 5.18
  6. 0.105
  7. 10.56
  8. 0.42
  9. 54.6
  10. 0.56
  11. 21.84
  12. 20.3
  13. 127.4
  14. 1.28
  15. 1.786
  16. 124.2
  17. 0.495
  18. 1.125
  19. 163.8
  20. 8.91
  21. 89.1
  22. 15.68
  23. 47.7
  24. 1.76
  25. 3.036
  26. 0.338
  27. 6.12
  28. 1.06
  29. 0.296
  30. 5.67
  31. 1.68
  32. 4.5
  33. 1.65
  34. 11.52
  35. 1.476
  36. 5.25
  37. 248.5
  38. 2.34
  39. 4.16
  40. 30.6

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