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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 732 · 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. 1.0.33 × 22 — where does the decimal point go? (a) 0.0726 (b) 0.726 (c) 7.26 (d) 72.6
  2. 2.9.6 × 0.7 — where does the decimal point go? (a) 67.2 (b) 0.672 (c) 0.0672 (d) 6.72
  3. 3.8.9 × 3.9 — where does the decimal point go? (a) 347.1 (b) 34.71 (c) 0.3471 (d) 3.471
  4. 4.0.13 × 17 — where does the decimal point go? (a) 0.221 (b) 2.21 (c) 0.0221 (d) 22.1
  5. 5.4.7 × 3 — where does the decimal point go? (a) 14.1 (b) 1.41 (c) 0.141 (d) 141
  6. 6.3.7 × 16 — where does the decimal point go? (a) 59.2 (b) 5.92 (c) 592 (d) 0.592
  7. 7.3.9 × 12 — where does the decimal point go? (a) 468 (b) 4.68 (c) 0.468 (d) 46.8
  8. 8.0.36 × 2 — where does the decimal point go? (a) 7.2 (b) 0.72 (c) 0.0072 (d) 0.072
  9. 9.0.13 × 45 — where does the decimal point go? (a) 0.0585 (b) 58.5 (c) 0.585 (d) 5.85
  10. 10.0.47 × 4 — where does the decimal point go? (a) 18.8 (b) 0.188 (c) 0.0188 (d) 1.88
  11. 11.0.58 × 3.6 — where does the decimal point go? (a) 20.88 (b) 0.02088 (c) 0.2088 (d) 2.088
  12. 12.5.5 × 4.9 — where does the decimal point go? (a) 26.95 (b) 269.5 (c) 0.2695 (d) 2.695
  13. 13.1.3 × 39 — where does the decimal point go? (a) 5.07 (b) 50.7 (c) 507 (d) 0.507
  14. 14.7.4 × 3.7 — where does the decimal point go? (a) 273.8 (b) 2.738 (c) 27.38 (d) 0.2738
  15. 15.0.87 × 25 — where does the decimal point go? (a) 21.75 (b) 0.2175 (c) 217.5 (d) 2.175
  16. 16.7.1 × 0.9 — where does the decimal point go? (a) 63.9 (b) 0.639 (c) 6.39 (d) 0.0639
  17. 17.3.4 × 0.7 — where does the decimal point go? (a) 0.238 (b) 23.8 (c) 2.38 (d) 0.0238
  18. 18.1.3 × 0.3 — where does the decimal point go? (a) 0.39 (b) 0.0039 (c) 0.039 (d) 3.9
  19. 19.0.53 × 41 — where does the decimal point go? (a) 0.2173 (b) 2.173 (c) 21.73 (d) 217.3
  20. 20.3.7 × 1.1 — where does the decimal point go? (a) 40.7 (b) 4.07 (c) 0.407 (d) 0.0407
  21. 21.4.9 × 0.5 — where does the decimal point go? (a) 0.0245 (b) 0.245 (c) 2.45 (d) 24.5
  22. 22.0.17 × 49 — where does the decimal point go? (a) 8.33 (b) 83.3 (c) 0.833 (d) 0.0833
  23. 23.8.9 × 3 — where does the decimal point go? (a) 26.7 (b) 0.267 (c) 267 (d) 2.67
  24. 24.7.2 × 0.6 — where does the decimal point go? (a) 43.2 (b) 0.432 (c) 0.0432 (d) 4.32
  25. 25.0.59 × 4 — where does the decimal point go? (a) 23.6 (b) 2.36 (c) 0.0236 (d) 0.236
  26. 26.0.66 × 8 — where does the decimal point go? (a) 0.0528 (b) 5.28 (c) 52.8 (d) 0.528
  27. 27.0.77 × 0.8 — where does the decimal point go? (a) 0.0616 (b) 0.616 (c) 0.00616 (d) 6.16
  28. 28.6.8 × 41 — where does the decimal point go? (a) 27.88 (b) 2.788 (c) 278.8 (d) 2788
  29. 29.0.53 × 0.8 — where does the decimal point go? (a) 4.24 (b) 0.00424 (c) 0.424 (d) 0.0424
  30. 30.3.9 × 0.8 — where does the decimal point go? (a) 3.12 (b) 31.2 (c) 0.0312 (d) 0.312
  31. 31.0.78 × 3.7 — where does the decimal point go? (a) 2.886 (b) 28.86 (c) 0.02886 (d) 0.2886
  32. 32.0.88 × 9 — where does the decimal point go? (a) 0.792 (b) 7.92 (c) 0.0792 (d) 79.2
  33. 33.3.1 × 0.2 — where does the decimal point go? (a) 0.0062 (b) 6.2 (c) 0.062 (d) 0.62
  34. 34.6.9 × 9 — where does the decimal point go? (a) 621 (b) 6.21 (c) 0.621 (d) 62.1
  35. 35.0.77 × 39 — where does the decimal point go? (a) 3.003 (b) 0.3003 (c) 30.03 (d) 300.3
  36. 36.9.2 × 8 — where does the decimal point go? (a) 0.736 (b) 7.36 (c) 736 (d) 73.6
  37. 37.0.79 × 4.7 — where does the decimal point go? (a) 3.713 (b) 0.03713 (c) 37.13 (d) 0.3713
  38. 38.2.4 × 0.9 — where does the decimal point go? (a) 0.0216 (b) 21.6 (c) 0.216 (d) 2.16
  39. 39.0.29 × 1.6 — where does the decimal point go? (a) 0.00464 (b) 4.64 (c) 0.0464 (d) 0.464
  40. 40.1.7 × 24 — where does the decimal point go? (a) 4.08 (b) 408 (c) 0.408 (d) 40.8

Answer key

  1. 7.26
  2. 6.72
  3. 34.71
  4. 2.21
  5. 14.1
  6. 59.2
  7. 46.8
  8. 0.72
  9. 5.85
  10. 1.88
  11. 2.088
  12. 26.95
  13. 50.7
  14. 27.38
  15. 21.75
  16. 6.39
  17. 2.38
  18. 0.39
  19. 21.73
  20. 4.07
  21. 2.45
  22. 8.33
  23. 26.7
  24. 4.32
  25. 2.36
  26. 5.28
  27. 0.616
  28. 278.8
  29. 0.424
  30. 3.12
  31. 2.886
  32. 7.92
  33. 0.62
  34. 62.1
  35. 30.03
  36. 73.6
  37. 3.713
  38. 2.16
  39. 0.464
  40. 40.8

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