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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 397 · 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. 1.0.79 × 4 — where does the decimal point go? (a) 31.6 (b) 0.0316 (c) 3.16 (d) 0.316
  2. 2.4.1 × 16 — where does the decimal point go? (a) 6.56 (b) 656 (c) 65.6 (d) 0.656
  3. 3.7.6 × 43 — where does the decimal point go? (a) 32.68 (b) 3.268 (c) 326.8 (d) 3268
  4. 4.0.55 × 3.5 — where does the decimal point go? (a) 0.1925 (b) 0.01925 (c) 19.25 (d) 1.925
  5. 5.0.58 × 0.3 — where does the decimal point go? (a) 1.74 (b) 0.174 (c) 0.00174 (d) 0.0174
  6. 6.0.56 × 0.6 — where does the decimal point go? (a) 0.336 (b) 0.0336 (c) 3.36 (d) 0.00336
  7. 7.0.88 × 0.2 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 0.00176 (d) 0.0176
  8. 8.5.3 × 21 — where does the decimal point go? (a) 1.113 (b) 1113 (c) 111.3 (d) 11.13
  9. 9.0.63 × 0.3 — where does the decimal point go? (a) 0.0189 (b) 1.89 (c) 0.00189 (d) 0.189
  10. 10.3.8 × 1.9 — where does the decimal point go? (a) 7.22 (b) 0.722 (c) 72.2 (d) 0.0722
  11. 11.2.8 × 3 — where does the decimal point go? (a) 0.84 (b) 0.084 (c) 84 (d) 8.4
  12. 12.0.95 × 3.7 — where does the decimal point go? (a) 3.515 (b) 0.03515 (c) 35.15 (d) 0.3515
  13. 13.8.6 × 39 — where does the decimal point go? (a) 3354 (b) 3.354 (c) 33.54 (d) 335.4
  14. 14.1.9 × 2.3 — where does the decimal point go? (a) 4.37 (b) 0.0437 (c) 43.7 (d) 0.437
  15. 15.3.8 × 29 — where does the decimal point go? (a) 110.2 (b) 1102 (c) 11.02 (d) 1.102
  16. 16.7.1 × 5 — where does the decimal point go? (a) 35.5 (b) 0.355 (c) 355 (d) 3.55
  17. 17.3.3 × 4.7 — where does the decimal point go? (a) 15.51 (b) 155.1 (c) 0.1551 (d) 1.551
  18. 18.0.25 × 0.9 — where does the decimal point go? (a) 2.25 (b) 0.00225 (c) 0.225 (d) 0.0225
  19. 19.0.21 × 5 — where does the decimal point go? (a) 0.0105 (b) 1.05 (c) 10.5 (d) 0.105
  20. 20.3.6 × 3 — where does the decimal point go? (a) 0.108 (b) 108 (c) 1.08 (d) 10.8
  21. 21.0.73 × 42 — where does the decimal point go? (a) 0.3066 (b) 3.066 (c) 30.66 (d) 306.6
  22. 22.0.29 × 45 — where does the decimal point go? (a) 130.5 (b) 13.05 (c) 1.305 (d) 0.1305
  23. 23.0.32 × 0.7 — where does the decimal point go? (a) 0.224 (b) 0.00224 (c) 2.24 (d) 0.0224
  24. 24.1.3 × 0.2 — where does the decimal point go? (a) 0.026 (b) 0.26 (c) 0.0026 (d) 2.6
  25. 25.9.3 × 19 — where does the decimal point go? (a) 1.767 (b) 176.7 (c) 17.67 (d) 1767
  26. 26.5.2 × 2.4 — where does the decimal point go? (a) 124.8 (b) 12.48 (c) 0.1248 (d) 1.248
  27. 27.0.86 × 49 — where does the decimal point go? (a) 4.214 (b) 421.4 (c) 0.4214 (d) 42.14
  28. 28.1.8 × 29 — where does the decimal point go? (a) 5.22 (b) 52.2 (c) 0.522 (d) 522
  29. 29.5.2 × 33 — where does the decimal point go? (a) 17.16 (b) 171.6 (c) 1716 (d) 1.716
  30. 30.1.2 × 14 — where does the decimal point go? (a) 0.168 (b) 168 (c) 16.8 (d) 1.68
  31. 31.4.3 × 0.4 — where does the decimal point go? (a) 17.2 (b) 0.0172 (c) 0.172 (d) 1.72
  32. 32.0.87 × 0.2 — where does the decimal point go? (a) 0.174 (b) 0.00174 (c) 0.0174 (d) 1.74
  33. 33.5.7 × 9 — where does the decimal point go? (a) 0.513 (b) 513 (c) 5.13 (d) 51.3
  34. 34.9.9 × 22 — where does the decimal point go? (a) 217.8 (b) 2.178 (c) 21.78 (d) 2178
  35. 35.9.9 × 5 — where does the decimal point go? (a) 4.95 (b) 495 (c) 49.5 (d) 0.495
  36. 36.0.42 × 8 — where does the decimal point go? (a) 0.336 (b) 3.36 (c) 33.6 (d) 0.0336
  37. 37.5.2 × 0.8 — where does the decimal point go? (a) 0.416 (b) 0.0416 (c) 4.16 (d) 41.6
  38. 38.5.5 × 3 — where does the decimal point go? (a) 0.165 (b) 16.5 (c) 165 (d) 1.65
  39. 39.0.94 × 3.2 — where does the decimal point go? (a) 3.008 (b) 30.08 (c) 0.03008 (d) 0.3008
  40. 40.6.6 × 0.9 — where does the decimal point go? (a) 5.94 (b) 0.0594 (c) 0.594 (d) 59.4

Answer key

  1. 3.16
  2. 65.6
  3. 326.8
  4. 1.925
  5. 0.174
  6. 0.336
  7. 0.176
  8. 111.3
  9. 0.189
  10. 7.22
  11. 8.4
  12. 3.515
  13. 335.4
  14. 4.37
  15. 110.2
  16. 35.5
  17. 15.51
  18. 0.225
  19. 1.05
  20. 10.8
  21. 30.66
  22. 13.05
  23. 0.224
  24. 0.26
  25. 176.7
  26. 12.48
  27. 42.14
  28. 52.2
  29. 171.6
  30. 16.8
  31. 1.72
  32. 0.174
  33. 51.3
  34. 217.8
  35. 49.5
  36. 3.36
  37. 4.16
  38. 16.5
  39. 3.008
  40. 5.94

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