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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 227 · 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. 1.0.15 × 3.1 — where does the decimal point go? (a) 0.0465 (b) 0.00465 (c) 0.465 (d) 4.65
  2. 2.1.9 × 38 — where does the decimal point go? (a) 7.22 (b) 72.2 (c) 722 (d) 0.722
  3. 3.1.8 × 3 — where does the decimal point go? (a) 54 (b) 5.4 (c) 0.054 (d) 0.54
  4. 4.6.9 × 8 — where does the decimal point go? (a) 0.552 (b) 552 (c) 5.52 (d) 55.2
  5. 5.2.4 × 0.4 — where does the decimal point go? (a) 0.096 (b) 9.6 (c) 0.0096 (d) 0.96
  6. 6.0.81 × 27 — where does the decimal point go? (a) 2.187 (b) 0.2187 (c) 218.7 (d) 21.87
  7. 7.9.4 × 4 — where does the decimal point go? (a) 376 (b) 0.376 (c) 37.6 (d) 3.76
  8. 8.4.1 × 43 — where does the decimal point go? (a) 17.63 (b) 1.763 (c) 1763 (d) 176.3
  9. 9.1.3 × 0.9 — where does the decimal point go? (a) 11.7 (b) 1.17 (c) 0.117 (d) 0.0117
  10. 10.5.4 × 3 — where does the decimal point go? (a) 16.2 (b) 0.162 (c) 1.62 (d) 162
  11. 11.0.63 × 0.4 — where does the decimal point go? (a) 0.00252 (b) 2.52 (c) 0.0252 (d) 0.252
  12. 12.6.9 × 33 — where does the decimal point go? (a) 2277 (b) 22.77 (c) 2.277 (d) 227.7
  13. 13.0.59 × 3.1 — where does the decimal point go? (a) 0.1829 (b) 0.01829 (c) 18.29 (d) 1.829
  14. 14.0.46 × 0.2 — where does the decimal point go? (a) 0.0092 (b) 0.00092 (c) 0.092 (d) 0.92
  15. 15.2.3 × 47 — where does the decimal point go? (a) 1.081 (b) 1081 (c) 108.1 (d) 10.81
  16. 16.0.43 × 2 — where does the decimal point go? (a) 8.6 (b) 0.0086 (c) 0.086 (d) 0.86
  17. 17.0.97 × 0.2 — where does the decimal point go? (a) 1.94 (b) 0.194 (c) 0.0194 (d) 0.00194
  18. 18.5.1 × 0.2 — where does the decimal point go? (a) 0.0102 (b) 1.02 (c) 10.2 (d) 0.102
  19. 19.7.1 × 2 — where does the decimal point go? (a) 14.2 (b) 0.142 (c) 1.42 (d) 142
  20. 20.5.6 × 0.7 — where does the decimal point go? (a) 39.2 (b) 3.92 (c) 0.392 (d) 0.0392
  21. 21.3.3 × 3.3 — where does the decimal point go? (a) 1.089 (b) 10.89 (c) 0.1089 (d) 108.9
  22. 22.0.59 × 0.5 — where does the decimal point go? (a) 0.0295 (b) 2.95 (c) 0.295 (d) 0.00295
  23. 23.9.5 × 0.7 — where does the decimal point go? (a) 0.665 (b) 0.0665 (c) 66.5 (d) 6.65
  24. 24.0.26 × 0.4 — where does the decimal point go? (a) 0.00104 (b) 0.104 (c) 0.0104 (d) 1.04
  25. 25.3.1 × 8 — where does the decimal point go? (a) 2.48 (b) 24.8 (c) 0.248 (d) 248
  26. 26.4.1 × 8 — where does the decimal point go? (a) 3.28 (b) 32.8 (c) 0.328 (d) 328
  27. 27.2.9 × 34 — where does the decimal point go? (a) 0.986 (b) 98.6 (c) 986 (d) 9.86
  28. 28.0.68 × 0.3 — where does the decimal point go? (a) 0.00204 (b) 0.204 (c) 2.04 (d) 0.0204
  29. 29.3.6 × 0.8 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 0.0288 (d) 28.8
  30. 30.1.6 × 2 — where does the decimal point go? (a) 0.32 (b) 32 (c) 0.032 (d) 3.2
  31. 31.5.3 × 0.2 — where does the decimal point go? (a) 1.06 (b) 10.6 (c) 0.0106 (d) 0.106
  32. 32.0.55 × 29 — where does the decimal point go? (a) 159.5 (b) 1.595 (c) 0.1595 (d) 15.95
  33. 33.7.9 × 0.3 — where does the decimal point go? (a) 2.37 (b) 23.7 (c) 0.0237 (d) 0.237
  34. 34.9.9 × 2 — where does the decimal point go? (a) 19.8 (b) 0.198 (c) 1.98 (d) 198
  35. 35.0.57 × 0.4 — where does the decimal point go? (a) 2.28 (b) 0.00228 (c) 0.228 (d) 0.0228
  36. 36.1.7 × 0.9 — where does the decimal point go? (a) 0.153 (b) 1.53 (c) 0.0153 (d) 15.3
  37. 37.0.42 × 18 — where does the decimal point go? (a) 0.0756 (b) 75.6 (c) 0.756 (d) 7.56
  38. 38.6.3 × 1.2 — where does the decimal point go? (a) 0.756 (b) 75.6 (c) 7.56 (d) 0.0756
  39. 39.0.38 × 0.6 — where does the decimal point go? (a) 0.00228 (b) 0.0228 (c) 2.28 (d) 0.228
  40. 40.3.9 × 21 — where does the decimal point go? (a) 0.819 (b) 8.19 (c) 81.9 (d) 819

Answer key

  1. 0.465
  2. 72.2
  3. 5.4
  4. 55.2
  5. 0.96
  6. 21.87
  7. 37.6
  8. 176.3
  9. 1.17
  10. 16.2
  11. 0.252
  12. 227.7
  13. 1.829
  14. 0.092
  15. 108.1
  16. 0.86
  17. 0.194
  18. 1.02
  19. 14.2
  20. 3.92
  21. 10.89
  22. 0.295
  23. 6.65
  24. 0.104
  25. 24.8
  26. 32.8
  27. 98.6
  28. 0.204
  29. 2.88
  30. 3.2
  31. 1.06
  32. 15.95
  33. 2.37
  34. 19.8
  35. 0.228
  36. 1.53
  37. 7.56
  38. 7.56
  39. 0.228
  40. 81.9

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