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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 290 · 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. 1.0.37 × 45 — where does the decimal point go? (a) 0.1665 (b) 1.665 (c) 166.5 (d) 16.65
  2. 2.0.91 × 26 — where does the decimal point go? (a) 23.66 (b) 236.6 (c) 2.366 (d) 0.2366
  3. 3.6.2 × 2.8 — where does the decimal point go? (a) 0.1736 (b) 1.736 (c) 17.36 (d) 173.6
  4. 4.0.51 × 1.2 — where does the decimal point go? (a) 0.612 (b) 6.12 (c) 0.00612 (d) 0.0612
  5. 5.0.97 × 2 — where does the decimal point go? (a) 1.94 (b) 19.4 (c) 0.0194 (d) 0.194
  6. 6.0.55 × 2.9 — where does the decimal point go? (a) 0.01595 (b) 15.95 (c) 1.595 (d) 0.1595
  7. 7.0.75 × 4.7 — where does the decimal point go? (a) 0.03525 (b) 35.25 (c) 3.525 (d) 0.3525
  8. 8.1.4 × 41 — where does the decimal point go? (a) 0.574 (b) 5.74 (c) 57.4 (d) 574
  9. 9.0.91 × 0.7 — where does the decimal point go? (a) 0.637 (b) 0.00637 (c) 0.0637 (d) 6.37
  10. 10.0.97 × 0.6 — where does the decimal point go? (a) 5.82 (b) 0.0582 (c) 0.582 (d) 0.00582
  11. 11.0.88 × 3.9 — where does the decimal point go? (a) 0.3432 (b) 34.32 (c) 0.03432 (d) 3.432
  12. 12.0.68 × 3.9 — where does the decimal point go? (a) 0.02652 (b) 26.52 (c) 0.2652 (d) 2.652
  13. 13.5.1 × 17 — where does the decimal point go? (a) 86.7 (b) 8.67 (c) 867 (d) 0.867
  14. 14.0.81 × 3 — where does the decimal point go? (a) 2.43 (b) 0.243 (c) 0.0243 (d) 24.3
  15. 15.3.9 × 0.3 — where does the decimal point go? (a) 0.0117 (b) 0.117 (c) 1.17 (d) 11.7
  16. 16.0.64 × 1.9 — where does the decimal point go? (a) 12.16 (b) 0.1216 (c) 0.01216 (d) 1.216
  17. 17.0.61 × 7 — where does the decimal point go? (a) 42.7 (b) 0.0427 (c) 4.27 (d) 0.427
  18. 18.9.2 × 7 — where does the decimal point go? (a) 64.4 (b) 644 (c) 6.44 (d) 0.644
  19. 19.0.37 × 0.8 — where does the decimal point go? (a) 0.0296 (b) 0.296 (c) 0.00296 (d) 2.96
  20. 20.2.7 × 46 — where does the decimal point go? (a) 1242 (b) 12.42 (c) 1.242 (d) 124.2
  21. 21.0.47 × 12 — where does the decimal point go? (a) 0.0564 (b) 0.564 (c) 56.4 (d) 5.64
  22. 22.0.37 × 0.7 — where does the decimal point go? (a) 0.0259 (b) 0.259 (c) 0.00259 (d) 2.59
  23. 23.6.6 × 2 — where does the decimal point go? (a) 1.32 (b) 0.132 (c) 13.2 (d) 132
  24. 24.0.97 × 7 — where does the decimal point go? (a) 67.9 (b) 0.0679 (c) 6.79 (d) 0.679
  25. 25.6.1 × 2 — where does the decimal point go? (a) 0.122 (b) 1.22 (c) 12.2 (d) 122
  26. 26.3.5 × 0.7 — where does the decimal point go? (a) 2.45 (b) 0.245 (c) 24.5 (d) 0.0245
  27. 27.0.48 × 28 — where does the decimal point go? (a) 1.344 (b) 134.4 (c) 13.44 (d) 0.1344
  28. 28.0.19 × 2 — where does the decimal point go? (a) 0.038 (b) 0.38 (c) 3.8 (d) 0.0038
  29. 29.3.5 × 5 — where does the decimal point go? (a) 17.5 (b) 1.75 (c) 175 (d) 0.175
  30. 30.9.3 × 0.2 — where does the decimal point go? (a) 0.186 (b) 0.0186 (c) 1.86 (d) 18.6
  31. 31.0.59 × 5 — where does the decimal point go? (a) 2.95 (b) 0.295 (c) 0.0295 (d) 29.5
  32. 32.1.9 × 2 — where does the decimal point go? (a) 0.038 (b) 38 (c) 0.38 (d) 3.8
  33. 33.0.33 × 7 — where does the decimal point go? (a) 0.0231 (b) 2.31 (c) 0.231 (d) 23.1
  34. 34.2.6 × 13 — where does the decimal point go? (a) 0.338 (b) 338 (c) 33.8 (d) 3.38
  35. 35.8.1 × 3.4 — where does the decimal point go? (a) 27.54 (b) 2.754 (c) 275.4 (d) 0.2754
  36. 36.0.24 × 2 — where does the decimal point go? (a) 0.48 (b) 0.048 (c) 4.8 (d) 0.0048
  37. 37.0.37 × 0.6 — where does the decimal point go? (a) 2.22 (b) 0.0222 (c) 0.00222 (d) 0.222
  38. 38.9.2 × 9 — where does the decimal point go? (a) 82.8 (b) 8.28 (c) 0.828 (d) 828
  39. 39.2.2 × 3 — where does the decimal point go? (a) 66 (b) 0.066 (c) 6.6 (d) 0.66
  40. 40.0.34 × 2 — where does the decimal point go? (a) 0.0068 (b) 0.68 (c) 6.8 (d) 0.068

Answer key

  1. 16.65
  2. 23.66
  3. 17.36
  4. 0.612
  5. 1.94
  6. 1.595
  7. 3.525
  8. 57.4
  9. 0.637
  10. 0.582
  11. 3.432
  12. 2.652
  13. 86.7
  14. 2.43
  15. 1.17
  16. 1.216
  17. 4.27
  18. 64.4
  19. 0.296
  20. 124.2
  21. 5.64
  22. 0.259
  23. 13.2
  24. 6.79
  25. 12.2
  26. 2.45
  27. 13.44
  28. 0.38
  29. 17.5
  30. 1.86
  31. 2.95
  32. 3.8
  33. 2.31
  34. 33.8
  35. 27.54
  36. 0.48
  37. 0.222
  38. 82.8
  39. 6.6
  40. 0.68

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