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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 702 · 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. 1.1.4 × 0.9 — where does the decimal point go? (a) 1.26 (b) 12.6 (c) 0.126 (d) 0.0126
  2. 2.5.7 × 5 — where does the decimal point go? (a) 0.285 (b) 28.5 (c) 2.85 (d) 285
  3. 3.0.38 × 9 — where does the decimal point go? (a) 0.0342 (b) 3.42 (c) 0.342 (d) 34.2
  4. 4.1.4 × 2.4 — where does the decimal point go? (a) 33.6 (b) 3.36 (c) 0.0336 (d) 0.336
  5. 5.0.84 × 0.9 — where does the decimal point go? (a) 0.756 (b) 7.56 (c) 0.0756 (d) 0.00756
  6. 6.5.7 × 3.8 — where does the decimal point go? (a) 21.66 (b) 2.166 (c) 0.2166 (d) 216.6
  7. 7.0.34 × 9 — where does the decimal point go? (a) 30.6 (b) 0.0306 (c) 0.306 (d) 3.06
  8. 8.8.9 × 1.6 — where does the decimal point go? (a) 0.1424 (b) 14.24 (c) 142.4 (d) 1.424
  9. 9.6.7 × 29 — where does the decimal point go? (a) 1943 (b) 1.943 (c) 194.3 (d) 19.43
  10. 10.0.97 × 1.5 — where does the decimal point go? (a) 1.455 (b) 0.1455 (c) 14.55 (d) 0.01455
  11. 11.6.8 × 0.4 — where does the decimal point go? (a) 27.2 (b) 0.272 (c) 0.0272 (d) 2.72
  12. 12.1.9 × 0.9 — where does the decimal point go? (a) 17.1 (b) 0.0171 (c) 1.71 (d) 0.171
  13. 13.0.23 × 0.7 — where does the decimal point go? (a) 1.61 (b) 0.161 (c) 0.00161 (d) 0.0161
  14. 14.6.8 × 22 — where does the decimal point go? (a) 1496 (b) 14.96 (c) 149.6 (d) 1.496
  15. 15.4.6 × 2.1 — where does the decimal point go? (a) 96.6 (b) 9.66 (c) 0.966 (d) 0.0966
  16. 16.4.7 × 4.4 — where does the decimal point go? (a) 2.068 (b) 206.8 (c) 20.68 (d) 0.2068
  17. 17.5.4 × 28 — where does the decimal point go? (a) 151.2 (b) 1512 (c) 15.12 (d) 1.512
  18. 18.3.2 × 8 — where does the decimal point go? (a) 25.6 (b) 256 (c) 0.256 (d) 2.56
  19. 19.0.44 × 7 — where does the decimal point go? (a) 30.8 (b) 3.08 (c) 0.0308 (d) 0.308
  20. 20.0.17 × 23 — where does the decimal point go? (a) 0.391 (b) 3.91 (c) 0.0391 (d) 39.1
  21. 21.7.5 × 1.9 — where does the decimal point go? (a) 0.1425 (b) 142.5 (c) 1.425 (d) 14.25
  22. 22.6.4 × 2 — where does the decimal point go? (a) 12.8 (b) 0.128 (c) 1.28 (d) 128
  23. 23.0.93 × 7 — where does the decimal point go? (a) 6.51 (b) 0.651 (c) 0.0651 (d) 65.1
  24. 24.2.7 × 4.3 — where does the decimal point go? (a) 116.1 (b) 1.161 (c) 11.61 (d) 0.1161
  25. 25.8.2 × 4 — where does the decimal point go? (a) 0.328 (b) 32.8 (c) 328 (d) 3.28
  26. 26.8.9 × 4.8 — where does the decimal point go? (a) 4.272 (b) 427.2 (c) 42.72 (d) 0.4272
  27. 27.9.6 × 0.2 — where does the decimal point go? (a) 0.0192 (b) 0.192 (c) 19.2 (d) 1.92
  28. 28.0.71 × 42 — where does the decimal point go? (a) 29.82 (b) 2.982 (c) 0.2982 (d) 298.2
  29. 29.0.71 × 0.5 — where does the decimal point go? (a) 0.00355 (b) 3.55 (c) 0.355 (d) 0.0355
  30. 30.0.43 × 3.4 — where does the decimal point go? (a) 1.462 (b) 0.01462 (c) 14.62 (d) 0.1462
  31. 31.1.5 × 3 — where does the decimal point go? (a) 0.45 (b) 4.5 (c) 0.045 (d) 45
  32. 32.0.91 × 13 — where does the decimal point go? (a) 1.183 (b) 118.3 (c) 11.83 (d) 0.1183
  33. 33.3.2 × 17 — where does the decimal point go? (a) 5.44 (b) 54.4 (c) 0.544 (d) 544
  34. 34.0.61 × 0.3 — where does the decimal point go? (a) 0.0183 (b) 0.183 (c) 0.00183 (d) 1.83
  35. 35.0.68 × 16 — where does the decimal point go? (a) 1.088 (b) 108.8 (c) 0.1088 (d) 10.88
  36. 36.0.23 × 29 — where does the decimal point go? (a) 66.7 (b) 0.667 (c) 6.67 (d) 0.0667
  37. 37.5.8 × 0.3 — where does the decimal point go? (a) 0.0174 (b) 0.174 (c) 1.74 (d) 17.4
  38. 38.7.8 × 0.9 — where does the decimal point go? (a) 0.0702 (b) 0.702 (c) 7.02 (d) 70.2
  39. 39.0.64 × 3.9 — where does the decimal point go? (a) 0.02496 (b) 0.2496 (c) 24.96 (d) 2.496
  40. 40.8.7 × 3.3 — where does the decimal point go? (a) 287.1 (b) 2.871 (c) 0.2871 (d) 28.71

Answer key

  1. 1.26
  2. 28.5
  3. 3.42
  4. 3.36
  5. 0.756
  6. 21.66
  7. 3.06
  8. 14.24
  9. 194.3
  10. 1.455
  11. 2.72
  12. 1.71
  13. 0.161
  14. 149.6
  15. 9.66
  16. 20.68
  17. 151.2
  18. 25.6
  19. 3.08
  20. 3.91
  21. 14.25
  22. 12.8
  23. 6.51
  24. 11.61
  25. 32.8
  26. 42.72
  27. 1.92
  28. 29.82
  29. 0.355
  30. 1.462
  31. 4.5
  32. 11.83
  33. 54.4
  34. 0.183
  35. 10.88
  36. 6.67
  37. 1.74
  38. 7.02
  39. 2.496
  40. 28.71

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