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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 198 · 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. 1.0.18 × 3 — where does the decimal point go? (a) 0.54 (b) 0.054 (c) 0.0054 (d) 5.4
  2. 2.0.43 × 5 — where does the decimal point go? (a) 2.15 (b) 0.215 (c) 21.5 (d) 0.0215
  3. 3.0.27 × 7 — where does the decimal point go? (a) 0.0189 (b) 1.89 (c) 0.189 (d) 18.9
  4. 4.9.7 × 3 — where does the decimal point go? (a) 291 (b) 29.1 (c) 0.291 (d) 2.91
  5. 5.4.1 × 16 — where does the decimal point go? (a) 656 (b) 0.656 (c) 65.6 (d) 6.56
  6. 6.0.59 × 5 — where does the decimal point go? (a) 29.5 (b) 0.0295 (c) 2.95 (d) 0.295
  7. 7.1.2 × 48 — where does the decimal point go? (a) 576 (b) 5.76 (c) 57.6 (d) 0.576
  8. 8.0.87 × 37 — where does the decimal point go? (a) 0.3219 (b) 32.19 (c) 3.219 (d) 321.9
  9. 9.4.9 × 5 — where does the decimal point go? (a) 245 (b) 0.245 (c) 2.45 (d) 24.5
  10. 10.6.7 × 0.9 — where does the decimal point go? (a) 60.3 (b) 0.603 (c) 6.03 (d) 0.0603
  11. 11.3.7 × 0.7 — where does the decimal point go? (a) 0.259 (b) 0.0259 (c) 25.9 (d) 2.59
  12. 12.8.3 × 5 — where does the decimal point go? (a) 4.15 (b) 41.5 (c) 0.415 (d) 415
  13. 13.0.38 × 2.6 — where does the decimal point go? (a) 0.0988 (b) 0.988 (c) 9.88 (d) 0.00988
  14. 14.0.75 × 3 — where does the decimal point go? (a) 2.25 (b) 0.225 (c) 22.5 (d) 0.0225
  15. 15.8.8 × 4.9 — where does the decimal point go? (a) 4.312 (b) 43.12 (c) 431.2 (d) 0.4312
  16. 16.2.7 × 1.8 — where does the decimal point go? (a) 0.0486 (b) 48.6 (c) 4.86 (d) 0.486
  17. 17.8.6 × 4 — where does the decimal point go? (a) 34.4 (b) 3.44 (c) 0.344 (d) 344
  18. 18.0.77 × 8 — where does the decimal point go? (a) 0.616 (b) 61.6 (c) 6.16 (d) 0.0616
  19. 19.0.32 × 48 — where does the decimal point go? (a) 15.36 (b) 1.536 (c) 0.1536 (d) 153.6
  20. 20.4.3 × 4.5 — where does the decimal point go? (a) 19.35 (b) 193.5 (c) 1.935 (d) 0.1935
  21. 21.0.71 × 2.7 — where does the decimal point go? (a) 19.17 (b) 0.1917 (c) 1.917 (d) 0.01917
  22. 22.0.58 × 4.1 — where does the decimal point go? (a) 0.02378 (b) 2.378 (c) 0.2378 (d) 23.78
  23. 23.0.18 × 4.1 — where does the decimal point go? (a) 0.738 (b) 7.38 (c) 0.0738 (d) 0.00738
  24. 24.6.2 × 4.6 — where does the decimal point go? (a) 28.52 (b) 2.852 (c) 0.2852 (d) 285.2
  25. 25.0.42 × 9 — where does the decimal point go? (a) 0.378 (b) 3.78 (c) 0.0378 (d) 37.8
  26. 26.4.3 × 4.3 — where does the decimal point go? (a) 1.849 (b) 18.49 (c) 184.9 (d) 0.1849
  27. 27.8.7 × 22 — where does the decimal point go? (a) 1914 (b) 191.4 (c) 19.14 (d) 1.914
  28. 28.1.9 × 3 — where does the decimal point go? (a) 5.7 (b) 0.57 (c) 57 (d) 0.057
  29. 29.0.55 × 0.5 — where does the decimal point go? (a) 0.275 (b) 0.0275 (c) 0.00275 (d) 2.75
  30. 30.4.9 × 4 — where does the decimal point go? (a) 19.6 (b) 1.96 (c) 0.196 (d) 196
  31. 31.3.7 × 1.8 — where does the decimal point go? (a) 6.66 (b) 66.6 (c) 0.666 (d) 0.0666
  32. 32.8.5 × 9 — where does the decimal point go? (a) 0.765 (b) 765 (c) 7.65 (d) 76.5
  33. 33.6.6 × 7 — where does the decimal point go? (a) 46.2 (b) 0.462 (c) 462 (d) 4.62
  34. 34.2.3 × 28 — where does the decimal point go? (a) 0.644 (b) 644 (c) 6.44 (d) 64.4
  35. 35.0.46 × 0.2 — where does the decimal point go? (a) 0.00092 (b) 0.092 (c) 0.92 (d) 0.0092
  36. 36.4.4 × 0.9 — where does the decimal point go? (a) 39.6 (b) 0.396 (c) 0.0396 (d) 3.96
  37. 37.6.1 × 0.2 — where does the decimal point go? (a) 1.22 (b) 0.0122 (c) 0.122 (d) 12.2
  38. 38.0.27 × 9 — where does the decimal point go? (a) 0.243 (b) 24.3 (c) 2.43 (d) 0.0243
  39. 39.1.3 × 39 — where does the decimal point go? (a) 50.7 (b) 0.507 (c) 507 (d) 5.07
  40. 40.0.71 × 25 — where does the decimal point go? (a) 0.1775 (b) 17.75 (c) 177.5 (d) 1.775

Answer key

  1. 0.54
  2. 2.15
  3. 1.89
  4. 29.1
  5. 65.6
  6. 2.95
  7. 57.6
  8. 32.19
  9. 24.5
  10. 6.03
  11. 2.59
  12. 41.5
  13. 0.988
  14. 2.25
  15. 43.12
  16. 4.86
  17. 34.4
  18. 6.16
  19. 15.36
  20. 19.35
  21. 1.917
  22. 2.378
  23. 0.738
  24. 28.52
  25. 3.78
  26. 18.49
  27. 191.4
  28. 5.7
  29. 0.275
  30. 19.6
  31. 6.66
  32. 76.5
  33. 46.2
  34. 64.4
  35. 0.092
  36. 3.96
  37. 1.22
  38. 2.43
  39. 50.7
  40. 17.75

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