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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 292 · 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. 1.2.2 × 0.8 — where does the decimal point go? (a) 0.0176 (b) 17.6 (c) 1.76 (d) 0.176
  2. 2.0.98 × 31 — where does the decimal point go? (a) 3.038 (b) 303.8 (c) 0.3038 (d) 30.38
  3. 3.8.8 × 4.1 — where does the decimal point go? (a) 0.3608 (b) 36.08 (c) 3.608 (d) 360.8
  4. 4.5.7 × 0.5 — where does the decimal point go? (a) 0.285 (b) 0.0285 (c) 2.85 (d) 28.5
  5. 5.3.8 × 3 — where does the decimal point go? (a) 11.4 (b) 114 (c) 1.14 (d) 0.114
  6. 6.0.51 × 6 — where does the decimal point go? (a) 0.0306 (b) 0.306 (c) 3.06 (d) 30.6
  7. 7.0.53 × 18 — where does the decimal point go? (a) 0.954 (b) 9.54 (c) 95.4 (d) 0.0954
  8. 8.9.1 × 0.4 — where does the decimal point go? (a) 0.364 (b) 3.64 (c) 36.4 (d) 0.0364
  9. 9.0.86 × 2 — where does the decimal point go? (a) 0.0172 (b) 0.172 (c) 17.2 (d) 1.72
  10. 10.0.36 × 1.3 — where does the decimal point go? (a) 4.68 (b) 0.468 (c) 0.00468 (d) 0.0468
  11. 11.0.14 × 29 — where does the decimal point go? (a) 0.406 (b) 40.6 (c) 4.06 (d) 0.0406
  12. 12.0.27 × 45 — where does the decimal point go? (a) 1.215 (b) 121.5 (c) 0.1215 (d) 12.15
  13. 13.4.4 × 2 — where does the decimal point go? (a) 8.8 (b) 88 (c) 0.088 (d) 0.88
  14. 14.5.4 × 6 — where does the decimal point go? (a) 32.4 (b) 0.324 (c) 3.24 (d) 324
  15. 15.8.5 × 0.3 — where does the decimal point go? (a) 0.255 (b) 25.5 (c) 2.55 (d) 0.0255
  16. 16.0.42 × 0.6 — where does the decimal point go? (a) 0.00252 (b) 2.52 (c) 0.252 (d) 0.0252
  17. 17.5.2 × 3 — where does the decimal point go? (a) 156 (b) 1.56 (c) 15.6 (d) 0.156
  18. 18.0.47 × 6 — where does the decimal point go? (a) 2.82 (b) 0.0282 (c) 0.282 (d) 28.2
  19. 19.0.27 × 0.9 — where does the decimal point go? (a) 0.243 (b) 0.0243 (c) 2.43 (d) 0.00243
  20. 20.3.9 × 0.7 — where does the decimal point go? (a) 0.273 (b) 2.73 (c) 0.0273 (d) 27.3
  21. 21.0.49 × 0.7 — where does the decimal point go? (a) 3.43 (b) 0.0343 (c) 0.343 (d) 0.00343
  22. 22.9.9 × 21 — where does the decimal point go? (a) 20.79 (b) 2.079 (c) 207.9 (d) 2079
  23. 23.2.6 × 3.9 — where does the decimal point go? (a) 101.4 (b) 10.14 (c) 0.1014 (d) 1.014
  24. 24.5.8 × 17 — where does the decimal point go? (a) 0.986 (b) 98.6 (c) 986 (d) 9.86
  25. 25.6.1 × 3.7 — where does the decimal point go? (a) 0.2257 (b) 2.257 (c) 225.7 (d) 22.57
  26. 26.0.15 × 4.9 — where does the decimal point go? (a) 0.00735 (b) 0.735 (c) 7.35 (d) 0.0735
  27. 27.0.44 × 1.9 — where does the decimal point go? (a) 0.836 (b) 0.0836 (c) 0.00836 (d) 8.36
  28. 28.5.1 × 0.7 — where does the decimal point go? (a) 0.357 (b) 3.57 (c) 35.7 (d) 0.0357
  29. 29.0.22 × 2.4 — where does the decimal point go? (a) 0.0528 (b) 0.00528 (c) 0.528 (d) 5.28
  30. 30.0.78 × 4 — where does the decimal point go? (a) 0.0312 (b) 3.12 (c) 0.312 (d) 31.2
  31. 31.9.3 × 1.2 — where does the decimal point go? (a) 111.6 (b) 1.116 (c) 0.1116 (d) 11.16
  32. 32.0.41 × 22 — where does the decimal point go? (a) 0.902 (b) 0.0902 (c) 90.2 (d) 9.02
  33. 33.3.3 × 0.6 — where does the decimal point go? (a) 0.0198 (b) 19.8 (c) 0.198 (d) 1.98
  34. 34.2.7 × 4.5 — where does the decimal point go? (a) 121.5 (b) 0.1215 (c) 1.215 (d) 12.15
  35. 35.1.6 × 1.1 — where does the decimal point go? (a) 1.76 (b) 0.176 (c) 17.6 (d) 0.0176
  36. 36.6.2 × 0.4 — where does the decimal point go? (a) 0.0248 (b) 0.248 (c) 24.8 (d) 2.48
  37. 37.5.7 × 0.8 — where does the decimal point go? (a) 0.456 (b) 4.56 (c) 45.6 (d) 0.0456
  38. 38.7.6 × 41 — where does the decimal point go? (a) 311.6 (b) 31.16 (c) 3116 (d) 3.116
  39. 39.0.81 × 43 — where does the decimal point go? (a) 34.83 (b) 0.3483 (c) 3.483 (d) 348.3
  40. 40.0.13 × 12 — where does the decimal point go? (a) 0.0156 (b) 0.156 (c) 1.56 (d) 15.6

Answer key

  1. 1.76
  2. 30.38
  3. 36.08
  4. 2.85
  5. 11.4
  6. 3.06
  7. 9.54
  8. 3.64
  9. 1.72
  10. 0.468
  11. 4.06
  12. 12.15
  13. 8.8
  14. 32.4
  15. 2.55
  16. 0.252
  17. 15.6
  18. 2.82
  19. 0.243
  20. 2.73
  21. 0.343
  22. 207.9
  23. 10.14
  24. 98.6
  25. 22.57
  26. 0.735
  27. 0.836
  28. 3.57
  29. 0.528
  30. 3.12
  31. 11.16
  32. 9.02
  33. 1.98
  34. 12.15
  35. 1.76
  36. 2.48
  37. 4.56
  38. 311.6
  39. 34.83
  40. 1.56

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