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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 404 · 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. 1.7.3 × 17 — where does the decimal point go? (a) 12.41 (b) 1.241 (c) 124.1 (d) 1241
  2. 2.9.7 × 3 — where does the decimal point go? (a) 0.291 (b) 2.91 (c) 291 (d) 29.1
  3. 3.0.32 × 6 — where does the decimal point go? (a) 19.2 (b) 1.92 (c) 0.192 (d) 0.0192
  4. 4.3.6 × 17 — where does the decimal point go? (a) 61.2 (b) 0.612 (c) 6.12 (d) 612
  5. 5.0.82 × 1.7 — where does the decimal point go? (a) 1.394 (b) 13.94 (c) 0.1394 (d) 0.01394
  6. 6.0.69 × 2 — where does the decimal point go? (a) 0.0138 (b) 13.8 (c) 1.38 (d) 0.138
  7. 7.0.63 × 0.6 — where does the decimal point go? (a) 0.00378 (b) 0.0378 (c) 3.78 (d) 0.378
  8. 8.0.32 × 4.9 — where does the decimal point go? (a) 0.01568 (b) 1.568 (c) 15.68 (d) 0.1568
  9. 9.0.13 × 4 — where does the decimal point go? (a) 5.2 (b) 0.52 (c) 0.052 (d) 0.0052
  10. 10.4.9 × 49 — where does the decimal point go? (a) 240.1 (b) 2401 (c) 24.01 (d) 2.401
  11. 11.6.6 × 2.2 — where does the decimal point go? (a) 0.1452 (b) 145.2 (c) 14.52 (d) 1.452
  12. 12.0.17 × 16 — where does the decimal point go? (a) 0.0272 (b) 0.272 (c) 27.2 (d) 2.72
  13. 13.4.9 × 0.2 — where does the decimal point go? (a) 9.8 (b) 0.98 (c) 0.0098 (d) 0.098
  14. 14.1.3 × 11 — where does the decimal point go? (a) 1.43 (b) 0.143 (c) 14.3 (d) 143
  15. 15.0.56 × 4.8 — where does the decimal point go? (a) 2.688 (b) 0.02688 (c) 0.2688 (d) 26.88
  16. 16.0.52 × 3 — where does the decimal point go? (a) 0.0156 (b) 15.6 (c) 0.156 (d) 1.56
  17. 17.0.94 × 8 — where does the decimal point go? (a) 75.2 (b) 0.752 (c) 7.52 (d) 0.0752
  18. 18.0.74 × 0.9 — where does the decimal point go? (a) 0.666 (b) 0.0666 (c) 0.00666 (d) 6.66
  19. 19.8.1 × 0.5 — where does the decimal point go? (a) 0.0405 (b) 40.5 (c) 4.05 (d) 0.405
  20. 20.0.69 × 7 — where does the decimal point go? (a) 0.0483 (b) 0.483 (c) 48.3 (d) 4.83
  21. 21.6.7 × 0.2 — where does the decimal point go? (a) 13.4 (b) 0.0134 (c) 1.34 (d) 0.134
  22. 22.6.9 × 0.7 — where does the decimal point go? (a) 4.83 (b) 0.483 (c) 0.0483 (d) 48.3
  23. 23.0.43 × 0.8 — where does the decimal point go? (a) 3.44 (b) 0.344 (c) 0.0344 (d) 0.00344
  24. 24.2.9 × 5 — where does the decimal point go? (a) 0.145 (b) 145 (c) 14.5 (d) 1.45
  25. 25.5.4 × 2.9 — where does the decimal point go? (a) 0.1566 (b) 1.566 (c) 156.6 (d) 15.66
  26. 26.0.22 × 6 — where does the decimal point go? (a) 0.132 (b) 13.2 (c) 0.0132 (d) 1.32
  27. 27.0.29 × 12 — where does the decimal point go? (a) 0.0348 (b) 0.348 (c) 3.48 (d) 34.8
  28. 28.3.1 × 5 — where does the decimal point go? (a) 15.5 (b) 0.155 (c) 1.55 (d) 155
  29. 29.0.66 × 3 — where does the decimal point go? (a) 1.98 (b) 0.198 (c) 0.0198 (d) 19.8
  30. 30.0.66 × 18 — where does the decimal point go? (a) 118.8 (b) 11.88 (c) 1.188 (d) 0.1188
  31. 31.7.3 × 3.1 — where does the decimal point go? (a) 0.2263 (b) 2.263 (c) 22.63 (d) 226.3
  32. 32.7.2 × 0.6 — where does the decimal point go? (a) 0.432 (b) 43.2 (c) 0.0432 (d) 4.32
  33. 33.0.44 × 0.6 — where does the decimal point go? (a) 0.264 (b) 0.00264 (c) 2.64 (d) 0.0264
  34. 34.1.9 × 3 — where does the decimal point go? (a) 0.57 (b) 5.7 (c) 57 (d) 0.057
  35. 35.6.5 × 7 — where does the decimal point go? (a) 0.455 (b) 455 (c) 45.5 (d) 4.55
  36. 36.4.3 × 0.3 — where does the decimal point go? (a) 0.0129 (b) 0.129 (c) 1.29 (d) 12.9
  37. 37.2.8 × 0.3 — where does the decimal point go? (a) 8.4 (b) 0.84 (c) 0.0084 (d) 0.084
  38. 38.3.6 × 0.6 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 0.0216 (d) 21.6
  39. 39.2.8 × 4 — where does the decimal point go? (a) 112 (b) 1.12 (c) 11.2 (d) 0.112
  40. 40.4.9 × 6 — where does the decimal point go? (a) 294 (b) 2.94 (c) 0.294 (d) 29.4

Answer key

  1. 124.1
  2. 29.1
  3. 1.92
  4. 61.2
  5. 1.394
  6. 1.38
  7. 0.378
  8. 1.568
  9. 0.52
  10. 240.1
  11. 14.52
  12. 2.72
  13. 0.98
  14. 14.3
  15. 2.688
  16. 1.56
  17. 7.52
  18. 0.666
  19. 4.05
  20. 4.83
  21. 1.34
  22. 4.83
  23. 0.344
  24. 14.5
  25. 15.66
  26. 1.32
  27. 3.48
  28. 15.5
  29. 1.98
  30. 11.88
  31. 22.63
  32. 4.32
  33. 0.264
  34. 5.7
  35. 45.5
  36. 1.29
  37. 0.84
  38. 2.16
  39. 11.2
  40. 29.4

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