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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 632 · 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. 1.1.2 × 4 — where does the decimal point go? (a) 48 (b) 0.48 (c) 4.8 (d) 0.048
  2. 2.0.83 × 3.2 — where does the decimal point go? (a) 0.02656 (b) 0.2656 (c) 2.656 (d) 26.56
  3. 3.0.16 × 0.3 — where does the decimal point go? (a) 0.00048 (b) 0.48 (c) 0.0048 (d) 0.048
  4. 4.0.86 × 2 — where does the decimal point go? (a) 1.72 (b) 0.0172 (c) 0.172 (d) 17.2
  5. 5.0.27 × 1.7 — where does the decimal point go? (a) 0.00459 (b) 0.459 (c) 0.0459 (d) 4.59
  6. 6.5.9 × 0.5 — where does the decimal point go? (a) 29.5 (b) 0.0295 (c) 2.95 (d) 0.295
  7. 7.4.7 × 4 — where does the decimal point go? (a) 18.8 (b) 188 (c) 1.88 (d) 0.188
  8. 8.0.56 × 3 — where does the decimal point go? (a) 1.68 (b) 0.168 (c) 16.8 (d) 0.0168
  9. 9.0.18 × 2.3 — where does the decimal point go? (a) 4.14 (b) 0.00414 (c) 0.414 (d) 0.0414
  10. 10.7.7 × 29 — where does the decimal point go? (a) 223.3 (b) 2.233 (c) 2233 (d) 22.33
  11. 11.0.88 × 12 — where does the decimal point go? (a) 10.56 (b) 0.1056 (c) 1.056 (d) 105.6
  12. 12.7.6 × 37 — where does the decimal point go? (a) 28.12 (b) 2812 (c) 2.812 (d) 281.2
  13. 13.6.5 × 1.5 — where does the decimal point go? (a) 0.975 (b) 0.0975 (c) 9.75 (d) 97.5
  14. 14.0.72 × 0.6 — where does the decimal point go? (a) 4.32 (b) 0.0432 (c) 0.00432 (d) 0.432
  15. 15.4.4 × 0.3 — where does the decimal point go? (a) 13.2 (b) 0.0132 (c) 0.132 (d) 1.32
  16. 16.2.5 × 7 — where does the decimal point go? (a) 1.75 (b) 175 (c) 17.5 (d) 0.175
  17. 17.0.59 × 17 — where does the decimal point go? (a) 100.3 (b) 1.003 (c) 0.1003 (d) 10.03
  18. 18.1.9 × 33 — where does the decimal point go? (a) 62.7 (b) 6.27 (c) 0.627 (d) 627
  19. 19.2.8 × 21 — where does the decimal point go? (a) 588 (b) 0.588 (c) 5.88 (d) 58.8
  20. 20.0.84 × 7 — where does the decimal point go? (a) 58.8 (b) 0.0588 (c) 5.88 (d) 0.588
  21. 21.0.23 × 25 — where does the decimal point go? (a) 5.75 (b) 57.5 (c) 0.575 (d) 0.0575
  22. 22.3.2 × 49 — where does the decimal point go? (a) 1568 (b) 1.568 (c) 156.8 (d) 15.68
  23. 23.2.7 × 3 — where does the decimal point go? (a) 0.81 (b) 0.081 (c) 81 (d) 8.1
  24. 24.0.14 × 3.2 — where does the decimal point go? (a) 0.0448 (b) 0.448 (c) 0.00448 (d) 4.48
  25. 25.0.56 × 4.4 — where does the decimal point go? (a) 2.464 (b) 0.2464 (c) 24.64 (d) 0.02464
  26. 26.4.1 × 0.2 — where does the decimal point go? (a) 8.2 (b) 0.82 (c) 0.0082 (d) 0.082
  27. 27.0.57 × 0.8 — where does the decimal point go? (a) 0.0456 (b) 4.56 (c) 0.00456 (d) 0.456
  28. 28.2.2 × 24 — where does the decimal point go? (a) 0.528 (b) 528 (c) 5.28 (d) 52.8
  29. 29.0.43 × 0.7 — where does the decimal point go? (a) 3.01 (b) 0.0301 (c) 0.301 (d) 0.00301
  30. 30.2.2 × 2.7 — where does the decimal point go? (a) 0.0594 (b) 59.4 (c) 0.594 (d) 5.94
  31. 31.0.94 × 4 — where does the decimal point go? (a) 37.6 (b) 0.0376 (c) 0.376 (d) 3.76
  32. 32.0.89 × 32 — where does the decimal point go? (a) 284.8 (b) 28.48 (c) 2.848 (d) 0.2848
  33. 33.0.53 × 0.6 — where does the decimal point go? (a) 0.318 (b) 3.18 (c) 0.00318 (d) 0.0318
  34. 34.4.7 × 8 — where does the decimal point go? (a) 3.76 (b) 376 (c) 0.376 (d) 37.6
  35. 35.8.3 × 3.4 — where does the decimal point go? (a) 0.2822 (b) 2.822 (c) 282.2 (d) 28.22
  36. 36.0.86 × 0.8 — where does the decimal point go? (a) 0.00688 (b) 6.88 (c) 0.0688 (d) 0.688
  37. 37.6.5 × 1.1 — where does the decimal point go? (a) 7.15 (b) 0.715 (c) 0.0715 (d) 71.5
  38. 38.8.8 × 0.9 — where does the decimal point go? (a) 7.92 (b) 0.792 (c) 79.2 (d) 0.0792
  39. 39.0.96 × 2.8 — where does the decimal point go? (a) 0.02688 (b) 2.688 (c) 0.2688 (d) 26.88
  40. 40.8.3 × 0.6 — where does the decimal point go? (a) 0.498 (b) 4.98 (c) 49.8 (d) 0.0498

Answer key

  1. 4.8
  2. 2.656
  3. 0.048
  4. 1.72
  5. 0.459
  6. 2.95
  7. 18.8
  8. 1.68
  9. 0.414
  10. 223.3
  11. 10.56
  12. 281.2
  13. 9.75
  14. 0.432
  15. 1.32
  16. 17.5
  17. 10.03
  18. 62.7
  19. 58.8
  20. 5.88
  21. 5.75
  22. 156.8
  23. 8.1
  24. 0.448
  25. 2.464
  26. 0.82
  27. 0.456
  28. 52.8
  29. 0.301
  30. 5.94
  31. 3.76
  32. 28.48
  33. 0.318
  34. 37.6
  35. 28.22
  36. 0.688
  37. 7.15
  38. 7.92
  39. 2.688
  40. 4.98

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