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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 200 · 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. 1.8.2 × 31 — where does the decimal point go? (a) 2.542 (b) 25.42 (c) 254.2 (d) 2542
  2. 2.0.39 × 31 — where does the decimal point go? (a) 1.209 (b) 12.09 (c) 120.9 (d) 0.1209
  3. 3.3.2 × 2.3 — where does the decimal point go? (a) 0.0736 (b) 0.736 (c) 73.6 (d) 7.36
  4. 4.3.9 × 0.3 — where does the decimal point go? (a) 0.117 (b) 1.17 (c) 11.7 (d) 0.0117
  5. 5.0.27 × 0.5 — where does the decimal point go? (a) 1.35 (b) 0.135 (c) 0.00135 (d) 0.0135
  6. 6.0.43 × 19 — where does the decimal point go? (a) 8.17 (b) 0.817 (c) 0.0817 (d) 81.7
  7. 7.0.61 × 6 — where does the decimal point go? (a) 0.0366 (b) 36.6 (c) 0.366 (d) 3.66
  8. 8.7.2 × 2.7 — where does the decimal point go? (a) 0.1944 (b) 194.4 (c) 19.44 (d) 1.944
  9. 9.2.3 × 0.4 — where does the decimal point go? (a) 0.092 (b) 0.0092 (c) 9.2 (d) 0.92
  10. 10.3.4 × 44 — where does the decimal point go? (a) 1.496 (b) 14.96 (c) 149.6 (d) 1496
  11. 11.1.2 × 0.8 — where does the decimal point go? (a) 9.6 (b) 0.0096 (c) 0.096 (d) 0.96
  12. 12.2.1 × 3 — where does the decimal point go? (a) 0.063 (b) 63 (c) 6.3 (d) 0.63
  13. 13.0.23 × 7 — where does the decimal point go? (a) 0.161 (b) 16.1 (c) 1.61 (d) 0.0161
  14. 14.0.79 × 6 — where does the decimal point go? (a) 47.4 (b) 0.474 (c) 0.0474 (d) 4.74
  15. 15.6.9 × 2 — where does the decimal point go? (a) 138 (b) 13.8 (c) 1.38 (d) 0.138
  16. 16.7.4 × 0.6 — where does the decimal point go? (a) 4.44 (b) 44.4 (c) 0.444 (d) 0.0444
  17. 17.0.62 × 16 — where does the decimal point go? (a) 99.2 (b) 9.92 (c) 0.992 (d) 0.0992
  18. 18.9.6 × 3 — where does the decimal point go? (a) 0.288 (b) 288 (c) 2.88 (d) 28.8
  19. 19.4.9 × 0.7 — where does the decimal point go? (a) 3.43 (b) 0.343 (c) 34.3 (d) 0.0343
  20. 20.0.14 × 4.3 — where does the decimal point go? (a) 0.00602 (b) 0.0602 (c) 6.02 (d) 0.602
  21. 21.7.7 × 8 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 61.6 (d) 616
  22. 22.9.8 × 28 — where does the decimal point go? (a) 274.4 (b) 2744 (c) 27.44 (d) 2.744
  23. 23.5.1 × 3.4 — where does the decimal point go? (a) 17.34 (b) 1.734 (c) 173.4 (d) 0.1734
  24. 24.9.8 × 9 — where does the decimal point go? (a) 882 (b) 8.82 (c) 0.882 (d) 88.2
  25. 25.2.6 × 0.7 — where does the decimal point go? (a) 0.0182 (b) 1.82 (c) 18.2 (d) 0.182
  26. 26.5.3 × 3.2 — where does the decimal point go? (a) 169.6 (b) 1.696 (c) 16.96 (d) 0.1696
  27. 27.7.2 × 19 — where does the decimal point go? (a) 13.68 (b) 1368 (c) 1.368 (d) 136.8
  28. 28.0.49 × 0.5 — where does the decimal point go? (a) 0.0245 (b) 0.00245 (c) 0.245 (d) 2.45
  29. 29.5.7 × 0.5 — where does the decimal point go? (a) 28.5 (b) 0.285 (c) 0.0285 (d) 2.85
  30. 30.2.9 × 1.3 — where does the decimal point go? (a) 0.0377 (b) 3.77 (c) 0.377 (d) 37.7
  31. 31.8.1 × 2 — where does the decimal point go? (a) 1.62 (b) 162 (c) 0.162 (d) 16.2
  32. 32.5.5 × 0.9 — where does the decimal point go? (a) 0.0495 (b) 4.95 (c) 0.495 (d) 49.5
  33. 33.7.3 × 2 — where does the decimal point go? (a) 1.46 (b) 0.146 (c) 146 (d) 14.6
  34. 34.0.13 × 0.4 — where does the decimal point go? (a) 0.52 (b) 0.052 (c) 0.0052 (d) 0.00052
  35. 35.4.2 × 4.4 — where does the decimal point go? (a) 18.48 (b) 1.848 (c) 0.1848 (d) 184.8
  36. 36.0.21 × 0.6 — where does the decimal point go? (a) 0.126 (b) 1.26 (c) 0.0126 (d) 0.00126
  37. 37.4.7 × 13 — where does the decimal point go? (a) 611 (b) 6.11 (c) 0.611 (d) 61.1
  38. 38.0.29 × 41 — where does the decimal point go? (a) 11.89 (b) 1.189 (c) 118.9 (d) 0.1189
  39. 39.0.52 × 2.6 — where does the decimal point go? (a) 0.01352 (b) 1.352 (c) 0.1352 (d) 13.52
  40. 40.2.9 × 44 — where does the decimal point go? (a) 127.6 (b) 1276 (c) 12.76 (d) 1.276

Answer key

  1. 254.2
  2. 12.09
  3. 7.36
  4. 1.17
  5. 0.135
  6. 8.17
  7. 3.66
  8. 19.44
  9. 0.92
  10. 149.6
  11. 0.96
  12. 6.3
  13. 1.61
  14. 4.74
  15. 13.8
  16. 4.44
  17. 9.92
  18. 28.8
  19. 3.43
  20. 0.602
  21. 61.6
  22. 274.4
  23. 17.34
  24. 88.2
  25. 1.82
  26. 16.96
  27. 136.8
  28. 0.245
  29. 2.85
  30. 3.77
  31. 16.2
  32. 4.95
  33. 14.6
  34. 0.052
  35. 18.48
  36. 0.126
  37. 61.1
  38. 11.89
  39. 1.352
  40. 127.6

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