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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 704 · 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. 1.0.16 × 17 — where does the decimal point go? (a) 2.72 (b) 0.272 (c) 27.2 (d) 0.0272
  2. 2.5.2 × 8 — where does the decimal point go? (a) 41.6 (b) 0.416 (c) 416 (d) 4.16
  3. 3.0.61 × 48 — where does the decimal point go? (a) 292.8 (b) 29.28 (c) 2.928 (d) 0.2928
  4. 4.0.41 × 9 — where does the decimal point go? (a) 36.9 (b) 0.369 (c) 3.69 (d) 0.0369
  5. 5.8.1 × 22 — where does the decimal point go? (a) 17.82 (b) 1782 (c) 178.2 (d) 1.782
  6. 6.3.6 × 4.3 — where does the decimal point go? (a) 15.48 (b) 1.548 (c) 0.1548 (d) 154.8
  7. 7.1.3 × 0.8 — where does the decimal point go? (a) 10.4 (b) 0.0104 (c) 1.04 (d) 0.104
  8. 8.3.3 × 3.7 — where does the decimal point go? (a) 1.221 (b) 122.1 (c) 0.1221 (d) 12.21
  9. 9.6.7 × 27 — where does the decimal point go? (a) 180.9 (b) 1.809 (c) 1809 (d) 18.09
  10. 10.0.76 × 1.4 — where does the decimal point go? (a) 1.064 (b) 10.64 (c) 0.01064 (d) 0.1064
  11. 11.0.24 × 34 — where does the decimal point go? (a) 0.0816 (b) 0.816 (c) 81.6 (d) 8.16
  12. 12.0.57 × 1.1 — where does the decimal point go? (a) 0.627 (b) 6.27 (c) 0.00627 (d) 0.0627
  13. 13.7.9 × 3.2 — where does the decimal point go? (a) 2.528 (b) 252.8 (c) 25.28 (d) 0.2528
  14. 14.6.7 × 0.9 — where does the decimal point go? (a) 0.0603 (b) 60.3 (c) 0.603 (d) 6.03
  15. 15.0.47 × 25 — where does the decimal point go? (a) 1.175 (b) 0.1175 (c) 11.75 (d) 117.5
  16. 16.0.87 × 0.5 — where does the decimal point go? (a) 0.00435 (b) 0.0435 (c) 0.435 (d) 4.35
  17. 17.2.4 × 6 — where does the decimal point go? (a) 144 (b) 0.144 (c) 14.4 (d) 1.44
  18. 18.9.3 × 6 — where does the decimal point go? (a) 5.58 (b) 558 (c) 0.558 (d) 55.8
  19. 19.1.8 × 1.8 — where does the decimal point go? (a) 0.0324 (b) 0.324 (c) 3.24 (d) 32.4
  20. 20.0.38 × 4 — where does the decimal point go? (a) 0.152 (b) 15.2 (c) 1.52 (d) 0.0152
  21. 21.5.4 × 1.4 — where does the decimal point go? (a) 75.6 (b) 7.56 (c) 0.756 (d) 0.0756
  22. 22.8.2 × 8 — where does the decimal point go? (a) 6.56 (b) 0.656 (c) 65.6 (d) 656
  23. 23.7.8 × 4.6 — where does the decimal point go? (a) 35.88 (b) 358.8 (c) 0.3588 (d) 3.588
  24. 24.0.95 × 47 — where does the decimal point go? (a) 446.5 (b) 0.4465 (c) 4.465 (d) 44.65
  25. 25.8.1 × 9 — where does the decimal point go? (a) 0.729 (b) 7.29 (c) 72.9 (d) 729
  26. 26.7.3 × 7 — where does the decimal point go? (a) 51.1 (b) 511 (c) 0.511 (d) 5.11
  27. 27.4.7 × 3 — where does the decimal point go? (a) 141 (b) 1.41 (c) 0.141 (d) 14.1
  28. 28.0.97 × 14 — where does the decimal point go? (a) 1.358 (b) 135.8 (c) 0.1358 (d) 13.58
  29. 29.0.29 × 38 — where does the decimal point go? (a) 11.02 (b) 0.1102 (c) 110.2 (d) 1.102
  30. 30.0.46 × 0.4 — where does the decimal point go? (a) 1.84 (b) 0.0184 (c) 0.184 (d) 0.00184
  31. 31.9.1 × 0.4 — where does the decimal point go? (a) 3.64 (b) 36.4 (c) 0.0364 (d) 0.364
  32. 32.3.3 × 3.4 — where does the decimal point go? (a) 112.2 (b) 1.122 (c) 11.22 (d) 0.1122
  33. 33.0.17 × 0.2 — where does the decimal point go? (a) 0.034 (b) 0.0034 (c) 0.34 (d) 0.00034
  34. 34.0.49 × 18 — where does the decimal point go? (a) 0.882 (b) 0.0882 (c) 8.82 (d) 88.2
  35. 35.0.13 × 0.4 — where does the decimal point go? (a) 0.00052 (b) 0.52 (c) 0.052 (d) 0.0052
  36. 36.0.62 × 26 — where does the decimal point go? (a) 16.12 (b) 0.1612 (c) 161.2 (d) 1.612
  37. 37.0.45 × 2.1 — where does the decimal point go? (a) 9.45 (b) 0.00945 (c) 0.945 (d) 0.0945
  38. 38.5.2 × 3.9 — where does the decimal point go? (a) 2.028 (b) 202.8 (c) 0.2028 (d) 20.28
  39. 39.0.69 × 0.8 — where does the decimal point go? (a) 0.00552 (b) 0.552 (c) 0.0552 (d) 5.52
  40. 40.7.3 × 8 — where does the decimal point go? (a) 0.584 (b) 58.4 (c) 584 (d) 5.84

Answer key

  1. 2.72
  2. 41.6
  3. 29.28
  4. 3.69
  5. 178.2
  6. 15.48
  7. 1.04
  8. 12.21
  9. 180.9
  10. 1.064
  11. 8.16
  12. 0.627
  13. 25.28
  14. 6.03
  15. 11.75
  16. 0.435
  17. 14.4
  18. 55.8
  19. 3.24
  20. 1.52
  21. 7.56
  22. 65.6
  23. 35.88
  24. 44.65
  25. 72.9
  26. 51.1
  27. 14.1
  28. 13.58
  29. 11.02
  30. 0.184
  31. 3.64
  32. 11.22
  33. 0.034
  34. 8.82
  35. 0.052
  36. 16.12
  37. 0.945
  38. 20.28
  39. 0.552
  40. 58.4

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