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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 444 · 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. 1.0.64 × 2.1 — where does the decimal point go? (a) 1.344 (b) 0.01344 (c) 0.1344 (d) 13.44
  2. 2.0.14 × 4.6 — where does the decimal point go? (a) 6.44 (b) 0.644 (c) 0.0644 (d) 0.00644
  3. 3.1.7 × 9 — where does the decimal point go? (a) 0.153 (b) 153 (c) 1.53 (d) 15.3
  4. 4.3.9 × 5 — where does the decimal point go? (a) 195 (b) 19.5 (c) 0.195 (d) 1.95
  5. 5.0.69 × 48 — where does the decimal point go? (a) 33.12 (b) 331.2 (c) 3.312 (d) 0.3312
  6. 6.3.2 × 0.2 — where does the decimal point go? (a) 0.064 (b) 0.64 (c) 0.0064 (d) 6.4
  7. 7.0.76 × 7 — where does the decimal point go? (a) 5.32 (b) 0.532 (c) 0.0532 (d) 53.2
  8. 8.0.53 × 0.4 — where does the decimal point go? (a) 0.00212 (b) 0.0212 (c) 2.12 (d) 0.212
  9. 9.0.12 × 33 — where does the decimal point go? (a) 3.96 (b) 39.6 (c) 0.396 (d) 0.0396
  10. 10.4.2 × 1.1 — where does the decimal point go? (a) 0.462 (b) 4.62 (c) 0.0462 (d) 46.2
  11. 11.9.9 × 5 — where does the decimal point go? (a) 0.495 (b) 495 (c) 4.95 (d) 49.5
  12. 12.0.76 × 12 — where does the decimal point go? (a) 0.0912 (b) 9.12 (c) 91.2 (d) 0.912
  13. 13.4.1 × 18 — where does the decimal point go? (a) 73.8 (b) 7.38 (c) 0.738 (d) 738
  14. 14.2.1 × 0.9 — where does the decimal point go? (a) 1.89 (b) 0.189 (c) 0.0189 (d) 18.9
  15. 15.0.67 × 0.6 — where does the decimal point go? (a) 4.02 (b) 0.0402 (c) 0.00402 (d) 0.402
  16. 16.6.2 × 13 — where does the decimal point go? (a) 806 (b) 80.6 (c) 8.06 (d) 0.806
  17. 17.0.56 × 27 — where does the decimal point go? (a) 15.12 (b) 1.512 (c) 0.1512 (d) 151.2
  18. 18.1.4 × 4.4 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 0.0616 (d) 61.6
  19. 19.9.7 × 0.8 — where does the decimal point go? (a) 0.0776 (b) 7.76 (c) 0.776 (d) 77.6
  20. 20.0.33 × 3 — where does the decimal point go? (a) 0.99 (b) 0.0099 (c) 9.9 (d) 0.099
  21. 21.1.6 × 33 — where does the decimal point go? (a) 52.8 (b) 0.528 (c) 5.28 (d) 528
  22. 22.8.4 × 0.8 — where does the decimal point go? (a) 0.0672 (b) 6.72 (c) 67.2 (d) 0.672
  23. 23.6.4 × 0.6 — where does the decimal point go? (a) 0.0384 (b) 0.384 (c) 38.4 (d) 3.84
  24. 24.3.4 × 2.1 — where does the decimal point go? (a) 71.4 (b) 0.714 (c) 0.0714 (d) 7.14
  25. 25.0.56 × 39 — where does the decimal point go? (a) 2.184 (b) 0.2184 (c) 21.84 (d) 218.4
  26. 26.0.27 × 0.6 — where does the decimal point go? (a) 0.00162 (b) 0.162 (c) 1.62 (d) 0.0162
  27. 27.1.4 × 2.6 — where does the decimal point go? (a) 3.64 (b) 0.0364 (c) 0.364 (d) 36.4
  28. 28.0.54 × 2.8 — where does the decimal point go? (a) 1.512 (b) 0.1512 (c) 0.01512 (d) 15.12
  29. 29.0.67 × 6 — where does the decimal point go? (a) 0.0402 (b) 0.402 (c) 4.02 (d) 40.2
  30. 30.0.41 × 39 — where does the decimal point go? (a) 0.1599 (b) 15.99 (c) 1.599 (d) 159.9
  31. 31.0.58 × 2 — where does the decimal point go? (a) 1.16 (b) 0.0116 (c) 11.6 (d) 0.116
  32. 32.0.27 × 7 — where does the decimal point go? (a) 18.9 (b) 0.0189 (c) 0.189 (d) 1.89
  33. 33.0.32 × 3 — where does the decimal point go? (a) 0.0096 (b) 0.96 (c) 0.096 (d) 9.6
  34. 34.5.7 × 26 — where does the decimal point go? (a) 148.2 (b) 1.482 (c) 1482 (d) 14.82
  35. 35.9.3 × 0.7 — where does the decimal point go? (a) 0.651 (b) 0.0651 (c) 65.1 (d) 6.51
  36. 36.0.27 × 0.3 — where does the decimal point go? (a) 0.0081 (b) 0.00081 (c) 0.81 (d) 0.081
  37. 37.2.9 × 4 — where does the decimal point go? (a) 116 (b) 1.16 (c) 11.6 (d) 0.116
  38. 38.0.79 × 6 — where does the decimal point go? (a) 4.74 (b) 0.0474 (c) 47.4 (d) 0.474
  39. 39.0.39 × 3 — where does the decimal point go? (a) 1.17 (b) 0.0117 (c) 0.117 (d) 11.7
  40. 40.0.99 × 12 — where does the decimal point go? (a) 11.88 (b) 118.8 (c) 0.1188 (d) 1.188

Answer key

  1. 1.344
  2. 0.644
  3. 15.3
  4. 19.5
  5. 33.12
  6. 0.64
  7. 5.32
  8. 0.212
  9. 3.96
  10. 4.62
  11. 49.5
  12. 9.12
  13. 73.8
  14. 1.89
  15. 0.402
  16. 80.6
  17. 15.12
  18. 6.16
  19. 7.76
  20. 0.99
  21. 52.8
  22. 6.72
  23. 3.84
  24. 7.14
  25. 21.84
  26. 0.162
  27. 3.64
  28. 1.512
  29. 4.02
  30. 15.99
  31. 1.16
  32. 1.89
  33. 0.96
  34. 148.2
  35. 6.51
  36. 0.081
  37. 11.6
  38. 4.74
  39. 1.17
  40. 11.88

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