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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 158 · 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. 1.0.59 × 5 — where does the decimal point go? (a) 2.95 (b) 29.5 (c) 0.295 (d) 0.0295
  2. 2.2.3 × 7 — where does the decimal point go? (a) 161 (b) 1.61 (c) 16.1 (d) 0.161
  3. 3.0.98 × 3.9 — where does the decimal point go? (a) 0.3822 (b) 38.22 (c) 3.822 (d) 0.03822
  4. 4.4.8 × 3.2 — where does the decimal point go? (a) 0.1536 (b) 1.536 (c) 153.6 (d) 15.36
  5. 5.0.71 × 4.7 — where does the decimal point go? (a) 0.3337 (b) 33.37 (c) 3.337 (d) 0.03337
  6. 6.2.9 × 37 — where does the decimal point go? (a) 107.3 (b) 10.73 (c) 1073 (d) 1.073
  7. 7.0.78 × 0.3 — where does the decimal point go? (a) 0.234 (b) 0.0234 (c) 0.00234 (d) 2.34
  8. 8.1.7 × 26 — where does the decimal point go? (a) 4.42 (b) 442 (c) 44.2 (d) 0.442
  9. 9.8.8 × 9 — where does the decimal point go? (a) 79.2 (b) 792 (c) 7.92 (d) 0.792
  10. 10.9.4 × 6 — where does the decimal point go? (a) 0.564 (b) 56.4 (c) 5.64 (d) 564
  11. 11.0.17 × 49 — where does the decimal point go? (a) 0.833 (b) 8.33 (c) 83.3 (d) 0.0833
  12. 12.2.7 × 26 — where does the decimal point go? (a) 702 (b) 70.2 (c) 0.702 (d) 7.02
  13. 13.1.3 × 4.9 — where does the decimal point go? (a) 0.637 (b) 63.7 (c) 6.37 (d) 0.0637
  14. 14.7.1 × 6 — where does the decimal point go? (a) 0.426 (b) 4.26 (c) 42.6 (d) 426
  15. 15.7.7 × 0.7 — where does the decimal point go? (a) 0.539 (b) 0.0539 (c) 53.9 (d) 5.39
  16. 16.0.54 × 0.4 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 0.0216 (d) 0.00216
  17. 17.0.19 × 45 — where does the decimal point go? (a) 8.55 (b) 0.0855 (c) 85.5 (d) 0.855
  18. 18.3.7 × 1.9 — where does the decimal point go? (a) 0.703 (b) 7.03 (c) 0.0703 (d) 70.3
  19. 19.0.27 × 4 — where does the decimal point go? (a) 0.108 (b) 0.0108 (c) 1.08 (d) 10.8
  20. 20.0.23 × 36 — where does the decimal point go? (a) 0.828 (b) 82.8 (c) 8.28 (d) 0.0828
  21. 21.0.59 × 0.6 — where does the decimal point go? (a) 0.354 (b) 0.0354 (c) 0.00354 (d) 3.54
  22. 22.0.77 × 0.2 — where does the decimal point go? (a) 0.0154 (b) 0.154 (c) 1.54 (d) 0.00154
  23. 23.5.1 × 2.9 — where does the decimal point go? (a) 147.9 (b) 0.1479 (c) 14.79 (d) 1.479
  24. 24.2.2 × 38 — where does the decimal point go? (a) 8.36 (b) 83.6 (c) 836 (d) 0.836
  25. 25.8.2 × 7 — where does the decimal point go? (a) 57.4 (b) 5.74 (c) 574 (d) 0.574
  26. 26.0.71 × 0.6 — where does the decimal point go? (a) 0.0426 (b) 0.426 (c) 4.26 (d) 0.00426
  27. 27.0.16 × 0.6 — where does the decimal point go? (a) 0.96 (b) 0.096 (c) 0.00096 (d) 0.0096
  28. 28.0.77 × 33 — where does the decimal point go? (a) 2.541 (b) 0.2541 (c) 25.41 (d) 254.1
  29. 29.6.6 × 22 — where does the decimal point go? (a) 1452 (b) 14.52 (c) 145.2 (d) 1.452
  30. 30.0.12 × 8 — where does the decimal point go? (a) 0.96 (b) 9.6 (c) 0.0096 (d) 0.096
  31. 31.7.7 × 0.3 — where does the decimal point go? (a) 0.0231 (b) 2.31 (c) 0.231 (d) 23.1
  32. 32.2.4 × 8 — where does the decimal point go? (a) 192 (b) 1.92 (c) 0.192 (d) 19.2
  33. 33.0.54 × 0.6 — where does the decimal point go? (a) 3.24 (b) 0.324 (c) 0.00324 (d) 0.0324
  34. 34.2.3 × 2 — where does the decimal point go? (a) 46 (b) 0.046 (c) 4.6 (d) 0.46
  35. 35.0.99 × 16 — where does the decimal point go? (a) 15.84 (b) 1.584 (c) 0.1584 (d) 158.4
  36. 36.0.23 × 6 — where does the decimal point go? (a) 1.38 (b) 13.8 (c) 0.0138 (d) 0.138
  37. 37.0.63 × 8 — where does the decimal point go? (a) 0.504 (b) 5.04 (c) 50.4 (d) 0.0504
  38. 38.4.7 × 36 — where does the decimal point go? (a) 1.692 (b) 1692 (c) 169.2 (d) 16.92
  39. 39.5.3 × 26 — where does the decimal point go? (a) 13.78 (b) 137.8 (c) 1378 (d) 1.378
  40. 40.3.5 × 4.9 — where does the decimal point go? (a) 17.15 (b) 171.5 (c) 0.1715 (d) 1.715

Answer key

  1. 2.95
  2. 16.1
  3. 3.822
  4. 15.36
  5. 3.337
  6. 107.3
  7. 0.234
  8. 44.2
  9. 79.2
  10. 56.4
  11. 8.33
  12. 70.2
  13. 6.37
  14. 42.6
  15. 5.39
  16. 0.216
  17. 8.55
  18. 7.03
  19. 1.08
  20. 8.28
  21. 0.354
  22. 0.154
  23. 14.79
  24. 83.6
  25. 57.4
  26. 0.426
  27. 0.096
  28. 25.41
  29. 145.2
  30. 0.96
  31. 2.31
  32. 19.2
  33. 0.324
  34. 4.6
  35. 15.84
  36. 1.38
  37. 5.04
  38. 169.2
  39. 137.8
  40. 17.15

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