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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 250 · 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. 1.3.7 × 12 — where does the decimal point go? (a) 44.4 (b) 0.444 (c) 444 (d) 4.44
  2. 2.2.6 × 1.8 — where does the decimal point go? (a) 0.0468 (b) 0.468 (c) 46.8 (d) 4.68
  3. 3.7.3 × 14 — where does the decimal point go? (a) 1022 (b) 1.022 (c) 10.22 (d) 102.2
  4. 4.7.6 × 9 — where does the decimal point go? (a) 68.4 (b) 6.84 (c) 684 (d) 0.684
  5. 5.0.43 × 3.4 — where does the decimal point go? (a) 14.62 (b) 1.462 (c) 0.1462 (d) 0.01462
  6. 6.2.2 × 0.3 — where does the decimal point go? (a) 0.66 (b) 6.6 (c) 0.0066 (d) 0.066
  7. 7.0.44 × 1.8 — where does the decimal point go? (a) 0.0792 (b) 7.92 (c) 0.792 (d) 0.00792
  8. 8.7.6 × 0.9 — where does the decimal point go? (a) 0.0684 (b) 68.4 (c) 6.84 (d) 0.684
  9. 9.3.2 × 21 — where does the decimal point go? (a) 672 (b) 6.72 (c) 0.672 (d) 67.2
  10. 10.0.97 × 3 — where does the decimal point go? (a) 29.1 (b) 2.91 (c) 0.291 (d) 0.0291
  11. 11.5.8 × 7 — where does the decimal point go? (a) 406 (b) 0.406 (c) 40.6 (d) 4.06
  12. 12.0.57 × 35 — where does the decimal point go? (a) 1.995 (b) 0.1995 (c) 199.5 (d) 19.95
  13. 13.0.19 × 2 — where does the decimal point go? (a) 3.8 (b) 0.038 (c) 0.0038 (d) 0.38
  14. 14.0.36 × 7 — where does the decimal point go? (a) 2.52 (b) 25.2 (c) 0.252 (d) 0.0252
  15. 15.1.2 × 1.8 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 0.0216 (d) 21.6
  16. 16.0.12 × 24 — where does the decimal point go? (a) 28.8 (b) 0.288 (c) 2.88 (d) 0.0288
  17. 17.5.2 × 28 — where does the decimal point go? (a) 14.56 (b) 1456 (c) 1.456 (d) 145.6
  18. 18.7.3 × 3.4 — where does the decimal point go? (a) 0.2482 (b) 2.482 (c) 24.82 (d) 248.2
  19. 19.0.44 × 0.7 — where does the decimal point go? (a) 3.08 (b) 0.308 (c) 0.0308 (d) 0.00308
  20. 20.2.3 × 4.3 — where does the decimal point go? (a) 98.9 (b) 9.89 (c) 0.0989 (d) 0.989
  21. 21.0.39 × 0.7 — where does the decimal point go? (a) 0.273 (b) 0.00273 (c) 0.0273 (d) 2.73
  22. 22.8.1 × 17 — where does the decimal point go? (a) 137.7 (b) 13.77 (c) 1377 (d) 1.377
  23. 23.7.8 × 2.2 — where does the decimal point go? (a) 0.1716 (b) 171.6 (c) 1.716 (d) 17.16
  24. 24.3.1 × 0.8 — where does the decimal point go? (a) 2.48 (b) 0.0248 (c) 0.248 (d) 24.8
  25. 25.2.7 × 0.2 — where does the decimal point go? (a) 0.0054 (b) 0.054 (c) 5.4 (d) 0.54
  26. 26.2.4 × 4.4 — where does the decimal point go? (a) 10.56 (b) 1.056 (c) 0.1056 (d) 105.6
  27. 27.1.6 × 4.3 — where does the decimal point go? (a) 0.688 (b) 68.8 (c) 6.88 (d) 0.0688
  28. 28.8.4 × 14 — where does the decimal point go? (a) 1.176 (b) 11.76 (c) 1176 (d) 117.6
  29. 29.2.3 × 0.5 — where does the decimal point go? (a) 0.115 (b) 1.15 (c) 11.5 (d) 0.0115
  30. 30.5.2 × 2.3 — where does the decimal point go? (a) 119.6 (b) 0.1196 (c) 1.196 (d) 11.96
  31. 31.0.52 × 1.7 — where does the decimal point go? (a) 0.0884 (b) 0.884 (c) 0.00884 (d) 8.84
  32. 32.0.57 × 27 — where does the decimal point go? (a) 153.9 (b) 15.39 (c) 0.1539 (d) 1.539
  33. 33.3.3 × 2.8 — where does the decimal point go? (a) 9.24 (b) 0.0924 (c) 92.4 (d) 0.924
  34. 34.0.82 × 37 — where does the decimal point go? (a) 3.034 (b) 30.34 (c) 0.3034 (d) 303.4
  35. 35.0.27 × 0.8 — where does the decimal point go? (a) 2.16 (b) 0.216 (c) 0.0216 (d) 0.00216
  36. 36.5.1 × 12 — where does the decimal point go? (a) 0.612 (b) 612 (c) 6.12 (d) 61.2
  37. 37.1.8 × 44 — where does the decimal point go? (a) 79.2 (b) 7.92 (c) 0.792 (d) 792
  38. 38.4.9 × 0.7 — where does the decimal point go? (a) 0.0343 (b) 0.343 (c) 3.43 (d) 34.3
  39. 39.9.7 × 2.2 — where does the decimal point go? (a) 0.2134 (b) 2.134 (c) 213.4 (d) 21.34
  40. 40.1.5 × 0.3 — where does the decimal point go? (a) 0.0045 (b) 0.45 (c) 0.045 (d) 4.5

Answer key

  1. 44.4
  2. 4.68
  3. 102.2
  4. 68.4
  5. 1.462
  6. 0.66
  7. 0.792
  8. 6.84
  9. 67.2
  10. 2.91
  11. 40.6
  12. 19.95
  13. 0.38
  14. 2.52
  15. 2.16
  16. 2.88
  17. 145.6
  18. 24.82
  19. 0.308
  20. 9.89
  21. 0.273
  22. 137.7
  23. 17.16
  24. 2.48
  25. 0.54
  26. 10.56
  27. 6.88
  28. 117.6
  29. 1.15
  30. 11.96
  31. 0.884
  32. 15.39
  33. 9.24
  34. 30.34
  35. 0.216
  36. 61.2
  37. 79.2
  38. 3.43
  39. 21.34
  40. 0.45

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