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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 57 · 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. 1.1.3 × 41 — where does the decimal point go? (a) 53.3 (b) 533 (c) 5.33 (d) 0.533
  2. 2.0.51 × 37 — where does the decimal point go? (a) 18.87 (b) 0.1887 (c) 188.7 (d) 1.887
  3. 3.0.28 × 47 — where does the decimal point go? (a) 13.16 (b) 1.316 (c) 0.1316 (d) 131.6
  4. 4.0.27 × 3 — where does the decimal point go? (a) 0.0081 (b) 0.81 (c) 0.081 (d) 8.1
  5. 5.5.4 × 0.3 — where does the decimal point go? (a) 0.0162 (b) 0.162 (c) 16.2 (d) 1.62
  6. 6.8.4 × 2 — where does the decimal point go? (a) 1.68 (b) 0.168 (c) 16.8 (d) 168
  7. 7.9.7 × 3.9 — where does the decimal point go? (a) 37.83 (b) 0.3783 (c) 3.783 (d) 378.3
  8. 8.0.38 × 1.9 — where does the decimal point go? (a) 7.22 (b) 0.00722 (c) 0.722 (d) 0.0722
  9. 9.8.7 × 3 — where does the decimal point go? (a) 26.1 (b) 2.61 (c) 261 (d) 0.261
  10. 10.8.4 × 8 — where does the decimal point go? (a) 67.2 (b) 672 (c) 0.672 (d) 6.72
  11. 11.9.4 × 7 — where does the decimal point go? (a) 658 (b) 0.658 (c) 6.58 (d) 65.8
  12. 12.4.4 × 3.8 — where does the decimal point go? (a) 1.672 (b) 16.72 (c) 0.1672 (d) 167.2
  13. 13.0.67 × 34 — where does the decimal point go? (a) 0.2278 (b) 227.8 (c) 22.78 (d) 2.278
  14. 14.0.14 × 0.3 — where does the decimal point go? (a) 0.0042 (b) 0.42 (c) 0.042 (d) 0.00042
  15. 15.0.57 × 3 — where does the decimal point go? (a) 0.171 (b) 17.1 (c) 0.0171 (d) 1.71
  16. 16.0.77 × 3 — where does the decimal point go? (a) 0.0231 (b) 0.231 (c) 2.31 (d) 23.1
  17. 17.1.7 × 2 — where does the decimal point go? (a) 3.4 (b) 34 (c) 0.034 (d) 0.34
  18. 18.9.7 × 5 — where does the decimal point go? (a) 0.485 (b) 485 (c) 4.85 (d) 48.5
  19. 19.2.9 × 33 — where does the decimal point go? (a) 95.7 (b) 9.57 (c) 0.957 (d) 957
  20. 20.1.9 × 0.7 — where does the decimal point go? (a) 1.33 (b) 0.0133 (c) 0.133 (d) 13.3
  21. 21.0.32 × 4.3 — where does the decimal point go? (a) 0.1376 (b) 1.376 (c) 13.76 (d) 0.01376
  22. 22.0.76 × 9 — where does the decimal point go? (a) 6.84 (b) 68.4 (c) 0.0684 (d) 0.684
  23. 23.0.49 × 4.9 — where does the decimal point go? (a) 2.401 (b) 0.02401 (c) 0.2401 (d) 24.01
  24. 24.2.6 × 42 — where does the decimal point go? (a) 10.92 (b) 109.2 (c) 1.092 (d) 1092
  25. 25.1.2 × 42 — where does the decimal point go? (a) 5.04 (b) 0.504 (c) 50.4 (d) 504
  26. 26.0.61 × 0.5 — where does the decimal point go? (a) 0.0305 (b) 3.05 (c) 0.00305 (d) 0.305
  27. 27.4.1 × 0.2 — where does the decimal point go? (a) 0.0082 (b) 0.82 (c) 0.082 (d) 8.2
  28. 28.9.9 × 0.3 — where does the decimal point go? (a) 0.297 (b) 2.97 (c) 29.7 (d) 0.0297
  29. 29.0.57 × 0.5 — where does the decimal point go? (a) 0.0285 (b) 0.285 (c) 2.85 (d) 0.00285
  30. 30.4.1 × 2 — where does the decimal point go? (a) 0.082 (b) 0.82 (c) 8.2 (d) 82
  31. 31.0.23 × 5 — where does the decimal point go? (a) 1.15 (b) 0.0115 (c) 11.5 (d) 0.115
  32. 32.9.2 × 0.6 — where does the decimal point go? (a) 5.52 (b) 55.2 (c) 0.552 (d) 0.0552
  33. 33.0.91 × 1.6 — where does the decimal point go? (a) 14.56 (b) 0.1456 (c) 0.01456 (d) 1.456
  34. 34.7.4 × 4.1 — where does the decimal point go? (a) 0.3034 (b) 30.34 (c) 3.034 (d) 303.4
  35. 35.4.8 × 3.2 — where does the decimal point go? (a) 1.536 (b) 15.36 (c) 153.6 (d) 0.1536
  36. 36.0.48 × 0.7 — where does the decimal point go? (a) 0.0336 (b) 0.336 (c) 3.36 (d) 0.00336
  37. 37.0.44 × 4 — where does the decimal point go? (a) 0.0176 (b) 17.6 (c) 1.76 (d) 0.176
  38. 38.9.2 × 9 — where does the decimal point go? (a) 82.8 (b) 8.28 (c) 828 (d) 0.828
  39. 39.4.9 × 0.3 — where does the decimal point go? (a) 0.0147 (b) 0.147 (c) 14.7 (d) 1.47
  40. 40.1.7 × 1.9 — where does the decimal point go? (a) 0.323 (b) 3.23 (c) 0.0323 (d) 32.3

Answer key

  1. 53.3
  2. 18.87
  3. 13.16
  4. 0.81
  5. 1.62
  6. 16.8
  7. 37.83
  8. 0.722
  9. 26.1
  10. 67.2
  11. 65.8
  12. 16.72
  13. 22.78
  14. 0.042
  15. 1.71
  16. 2.31
  17. 3.4
  18. 48.5
  19. 95.7
  20. 1.33
  21. 1.376
  22. 6.84
  23. 2.401
  24. 109.2
  25. 50.4
  26. 0.305
  27. 0.82
  28. 2.97
  29. 0.285
  30. 8.2
  31. 1.15
  32. 5.52
  33. 1.456
  34. 30.34
  35. 15.36
  36. 0.336
  37. 1.76
  38. 82.8
  39. 1.47
  40. 3.23

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