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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 488 · 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. 1.3.8 × 14 — where does the decimal point go? (a) 0.532 (b) 53.2 (c) 5.32 (d) 532
  2. 2.5.1 × 18 — where does the decimal point go? (a) 91.8 (b) 9.18 (c) 0.918 (d) 918
  3. 3.0.47 × 2.7 — where does the decimal point go? (a) 0.01269 (b) 12.69 (c) 1.269 (d) 0.1269
  4. 4.3.1 × 4.1 — where does the decimal point go? (a) 127.1 (b) 1.271 (c) 12.71 (d) 0.1271
  5. 5.4.2 × 46 — where does the decimal point go? (a) 19.32 (b) 193.2 (c) 1932 (d) 1.932
  6. 6.0.97 × 3 — where does the decimal point go? (a) 0.291 (b) 2.91 (c) 29.1 (d) 0.0291
  7. 7.0.19 × 3 — where does the decimal point go? (a) 5.7 (b) 0.57 (c) 0.0057 (d) 0.057
  8. 8.0.32 × 0.3 — where does the decimal point go? (a) 0.096 (b) 0.00096 (c) 0.96 (d) 0.0096
  9. 9.3.3 × 0.6 — where does the decimal point go? (a) 0.198 (b) 19.8 (c) 0.0198 (d) 1.98
  10. 10.2.4 × 19 — where does the decimal point go? (a) 0.456 (b) 456 (c) 45.6 (d) 4.56
  11. 11.8.8 × 1.9 — where does the decimal point go? (a) 167.2 (b) 1.672 (c) 0.1672 (d) 16.72
  12. 12.9.9 × 0.7 — where does the decimal point go? (a) 0.0693 (b) 0.693 (c) 69.3 (d) 6.93
  13. 13.0.74 × 6 — where does the decimal point go? (a) 4.44 (b) 44.4 (c) 0.0444 (d) 0.444
  14. 14.0.38 × 19 — where does the decimal point go? (a) 7.22 (b) 0.0722 (c) 72.2 (d) 0.722
  15. 15.6.1 × 4 — where does the decimal point go? (a) 2.44 (b) 244 (c) 24.4 (d) 0.244
  16. 16.2.1 × 8 — where does the decimal point go? (a) 168 (b) 1.68 (c) 16.8 (d) 0.168
  17. 17.0.26 × 6 — where does the decimal point go? (a) 1.56 (b) 0.0156 (c) 0.156 (d) 15.6
  18. 18.0.59 × 8 — where does the decimal point go? (a) 47.2 (b) 0.472 (c) 0.0472 (d) 4.72
  19. 19.5.1 × 2 — where does the decimal point go? (a) 10.2 (b) 1.02 (c) 0.102 (d) 102
  20. 20.1.5 × 2.1 — where does the decimal point go? (a) 31.5 (b) 3.15 (c) 0.315 (d) 0.0315
  21. 21.5.5 × 15 — where does the decimal point go? (a) 82.5 (b) 825 (c) 0.825 (d) 8.25
  22. 22.0.36 × 17 — where does the decimal point go? (a) 61.2 (b) 0.0612 (c) 6.12 (d) 0.612
  23. 23.0.56 × 1.4 — where does the decimal point go? (a) 0.0784 (b) 0.00784 (c) 0.784 (d) 7.84
  24. 24.6.4 × 27 — where does the decimal point go? (a) 17.28 (b) 172.8 (c) 1728 (d) 1.728
  25. 25.0.52 × 0.4 — where does the decimal point go? (a) 0.208 (b) 2.08 (c) 0.00208 (d) 0.0208
  26. 26.8.9 × 2 — where does the decimal point go? (a) 178 (b) 1.78 (c) 0.178 (d) 17.8
  27. 27.0.68 × 9 — where does the decimal point go? (a) 6.12 (b) 0.612 (c) 0.0612 (d) 61.2
  28. 28.0.54 × 4.6 — where does the decimal point go? (a) 24.84 (b) 0.02484 (c) 0.2484 (d) 2.484
  29. 29.9.3 × 15 — where does the decimal point go? (a) 1395 (b) 13.95 (c) 1.395 (d) 139.5
  30. 30.5.9 × 22 — where does the decimal point go? (a) 1298 (b) 129.8 (c) 12.98 (d) 1.298
  31. 31.3.1 × 0.5 — where does the decimal point go? (a) 0.155 (b) 1.55 (c) 15.5 (d) 0.0155
  32. 32.0.82 × 4 — where does the decimal point go? (a) 3.28 (b) 0.0328 (c) 0.328 (d) 32.8
  33. 33.2.7 × 0.9 — where does the decimal point go? (a) 0.243 (b) 24.3 (c) 2.43 (d) 0.0243
  34. 34.0.71 × 2 — where does the decimal point go? (a) 14.2 (b) 0.142 (c) 0.0142 (d) 1.42
  35. 35.0.28 × 1.9 — where does the decimal point go? (a) 0.532 (b) 0.0532 (c) 0.00532 (d) 5.32
  36. 36.3.1 × 0.3 — where does the decimal point go? (a) 0.93 (b) 0.093 (c) 9.3 (d) 0.0093
  37. 37.5.2 × 0.9 — where does the decimal point go? (a) 4.68 (b) 0.468 (c) 46.8 (d) 0.0468
  38. 38.4.8 × 1.7 — where does the decimal point go? (a) 0.816 (b) 81.6 (c) 0.0816 (d) 8.16
  39. 39.0.61 × 35 — where does the decimal point go? (a) 21.35 (b) 213.5 (c) 2.135 (d) 0.2135
  40. 40.4.6 × 3 — where does the decimal point go? (a) 138 (b) 13.8 (c) 0.138 (d) 1.38

Answer key

  1. 53.2
  2. 91.8
  3. 1.269
  4. 12.71
  5. 193.2
  6. 2.91
  7. 0.57
  8. 0.096
  9. 1.98
  10. 45.6
  11. 16.72
  12. 6.93
  13. 4.44
  14. 7.22
  15. 24.4
  16. 16.8
  17. 1.56
  18. 4.72
  19. 10.2
  20. 3.15
  21. 82.5
  22. 6.12
  23. 0.784
  24. 172.8
  25. 0.208
  26. 17.8
  27. 6.12
  28. 2.484
  29. 139.5
  30. 129.8
  31. 1.55
  32. 3.28
  33. 2.43
  34. 1.42
  35. 0.532
  36. 0.93
  37. 4.68
  38. 8.16
  39. 21.35
  40. 13.8

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