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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 251 · 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. 1.1.3 × 7 — where does the decimal point go? (a) 91 (b) 9.1 (c) 0.091 (d) 0.91
  2. 2.3.1 × 0.6 — where does the decimal point go? (a) 1.86 (b) 18.6 (c) 0.0186 (d) 0.186
  3. 3.0.34 × 0.7 — where does the decimal point go? (a) 2.38 (b) 0.00238 (c) 0.0238 (d) 0.238
  4. 4.0.65 × 0.3 — where does the decimal point go? (a) 1.95 (b) 0.00195 (c) 0.0195 (d) 0.195
  5. 5.5.7 × 4.4 — where does the decimal point go? (a) 2.508 (b) 0.2508 (c) 25.08 (d) 250.8
  6. 6.6.9 × 4 — where does the decimal point go? (a) 27.6 (b) 0.276 (c) 2.76 (d) 276
  7. 7.6.3 × 6 — where does the decimal point go? (a) 0.378 (b) 378 (c) 3.78 (d) 37.8
  8. 8.3.4 × 4.2 — where does the decimal point go? (a) 14.28 (b) 0.1428 (c) 142.8 (d) 1.428
  9. 9.5.1 × 0.4 — where does the decimal point go? (a) 0.0204 (b) 2.04 (c) 20.4 (d) 0.204
  10. 10.7.4 × 28 — where does the decimal point go? (a) 2.072 (b) 20.72 (c) 2072 (d) 207.2
  11. 11.0.83 × 5 — where does the decimal point go? (a) 0.415 (b) 4.15 (c) 0.0415 (d) 41.5
  12. 12.0.76 × 3 — where does the decimal point go? (a) 0.228 (b) 0.0228 (c) 2.28 (d) 22.8
  13. 13.9.1 × 4 — where does the decimal point go? (a) 0.364 (b) 364 (c) 36.4 (d) 3.64
  14. 14.0.15 × 21 — where does the decimal point go? (a) 0.0315 (b) 0.315 (c) 31.5 (d) 3.15
  15. 15.0.67 × 48 — where does the decimal point go? (a) 3.216 (b) 321.6 (c) 32.16 (d) 0.3216
  16. 16.0.79 × 0.8 — where does the decimal point go? (a) 0.00632 (b) 0.0632 (c) 0.632 (d) 6.32
  17. 17.0.43 × 8 — where does the decimal point go? (a) 0.0344 (b) 3.44 (c) 34.4 (d) 0.344
  18. 18.0.92 × 4 — where does the decimal point go? (a) 0.368 (b) 0.0368 (c) 36.8 (d) 3.68
  19. 19.0.79 × 45 — where does the decimal point go? (a) 355.5 (b) 0.3555 (c) 3.555 (d) 35.55
  20. 20.6.9 × 0.5 — where does the decimal point go? (a) 3.45 (b) 0.0345 (c) 34.5 (d) 0.345
  21. 21.1.4 × 8 — where does the decimal point go? (a) 112 (b) 0.112 (c) 1.12 (d) 11.2
  22. 22.0.75 × 3.7 — where does the decimal point go? (a) 0.2775 (b) 0.02775 (c) 2.775 (d) 27.75
  23. 23.1.3 × 0.4 — where does the decimal point go? (a) 0.052 (b) 0.0052 (c) 0.52 (d) 5.2
  24. 24.8.3 × 1.1 — where does the decimal point go? (a) 9.13 (b) 0.0913 (c) 0.913 (d) 91.3
  25. 25.0.21 × 0.3 — where does the decimal point go? (a) 0.063 (b) 0.00063 (c) 0.0063 (d) 0.63
  26. 26.2.3 × 5 — where does the decimal point go? (a) 1.15 (b) 115 (c) 0.115 (d) 11.5
  27. 27.0.78 × 0.6 — where does the decimal point go? (a) 0.0468 (b) 4.68 (c) 0.00468 (d) 0.468
  28. 28.1.8 × 2 — where does the decimal point go? (a) 0.036 (b) 3.6 (c) 36 (d) 0.36
  29. 29.3.9 × 3 — where does the decimal point go? (a) 11.7 (b) 0.117 (c) 117 (d) 1.17
  30. 30.5.2 × 4 — where does the decimal point go? (a) 208 (b) 0.208 (c) 20.8 (d) 2.08
  31. 31.8.6 × 2.4 — where does the decimal point go? (a) 2.064 (b) 20.64 (c) 0.2064 (d) 206.4
  32. 32.4.3 × 2.1 — where does the decimal point go? (a) 0.0903 (b) 0.903 (c) 90.3 (d) 9.03
  33. 33.8.1 × 9 — where does the decimal point go? (a) 0.729 (b) 729 (c) 72.9 (d) 7.29
  34. 34.0.33 × 4 — where does the decimal point go? (a) 0.132 (b) 1.32 (c) 0.0132 (d) 13.2
  35. 35.0.34 × 0.9 — where does the decimal point go? (a) 0.306 (b) 0.00306 (c) 0.0306 (d) 3.06
  36. 36.3.3 × 4.9 — where does the decimal point go? (a) 1.617 (b) 0.1617 (c) 161.7 (d) 16.17
  37. 37.0.23 × 19 — where does the decimal point go? (a) 4.37 (b) 0.0437 (c) 0.437 (d) 43.7
  38. 38.0.76 × 2 — where does the decimal point go? (a) 0.152 (b) 1.52 (c) 15.2 (d) 0.0152
  39. 39.0.37 × 6 — where does the decimal point go? (a) 2.22 (b) 22.2 (c) 0.222 (d) 0.0222
  40. 40.2.4 × 8 — where does the decimal point go? (a) 0.192 (b) 19.2 (c) 192 (d) 1.92

Answer key

  1. 9.1
  2. 1.86
  3. 0.238
  4. 0.195
  5. 25.08
  6. 27.6
  7. 37.8
  8. 14.28
  9. 2.04
  10. 207.2
  11. 4.15
  12. 2.28
  13. 36.4
  14. 3.15
  15. 32.16
  16. 0.632
  17. 3.44
  18. 3.68
  19. 35.55
  20. 3.45
  21. 11.2
  22. 2.775
  23. 0.52
  24. 9.13
  25. 0.063
  26. 11.5
  27. 0.468
  28. 3.6
  29. 11.7
  30. 20.8
  31. 20.64
  32. 9.03
  33. 72.9
  34. 1.32
  35. 0.306
  36. 16.17
  37. 4.37
  38. 1.52
  39. 2.22
  40. 19.2

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