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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 138 · 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. 1.7.6 × 2 — where does the decimal point go? (a) 152 (b) 15.2 (c) 0.152 (d) 1.52
  2. 2.5.1 × 0.2 — where does the decimal point go? (a) 0.102 (b) 0.0102 (c) 1.02 (d) 10.2
  3. 3.0.33 × 9 — where does the decimal point go? (a) 2.97 (b) 29.7 (c) 0.0297 (d) 0.297
  4. 4.0.19 × 9 — where does the decimal point go? (a) 17.1 (b) 0.0171 (c) 1.71 (d) 0.171
  5. 5.0.77 × 2 — where does the decimal point go? (a) 0.154 (b) 1.54 (c) 0.0154 (d) 15.4
  6. 6.0.33 × 43 — where does the decimal point go? (a) 14.19 (b) 141.9 (c) 1.419 (d) 0.1419
  7. 7.1.6 × 28 — where does the decimal point go? (a) 4.48 (b) 0.448 (c) 44.8 (d) 448
  8. 8.0.35 × 5 — where does the decimal point go? (a) 0.0175 (b) 17.5 (c) 0.175 (d) 1.75
  9. 9.7.3 × 3.2 — where does the decimal point go? (a) 23.36 (b) 233.6 (c) 0.2336 (d) 2.336
  10. 10.0.41 × 2.2 — where does the decimal point go? (a) 0.00902 (b) 0.902 (c) 0.0902 (d) 9.02
  11. 11.3.6 × 0.2 — where does the decimal point go? (a) 0.0072 (b) 7.2 (c) 0.72 (d) 0.072
  12. 12.0.88 × 1.2 — where does the decimal point go? (a) 1.056 (b) 0.01056 (c) 0.1056 (d) 10.56
  13. 13.1.2 × 26 — where does the decimal point go? (a) 31.2 (b) 0.312 (c) 3.12 (d) 312
  14. 14.0.44 × 2.9 — where does the decimal point go? (a) 12.76 (b) 0.01276 (c) 1.276 (d) 0.1276
  15. 15.0.41 × 8 — where does the decimal point go? (a) 0.328 (b) 0.0328 (c) 3.28 (d) 32.8
  16. 16.5.1 × 2.4 — where does the decimal point go? (a) 0.1224 (b) 122.4 (c) 12.24 (d) 1.224
  17. 17.1.4 × 3.1 — where does the decimal point go? (a) 43.4 (b) 4.34 (c) 0.0434 (d) 0.434
  18. 18.1.6 × 8 — where does the decimal point go? (a) 12.8 (b) 128 (c) 1.28 (d) 0.128
  19. 19.0.41 × 0.6 — where does the decimal point go? (a) 0.0246 (b) 0.00246 (c) 0.246 (d) 2.46
  20. 20.1.7 × 4 — where does the decimal point go? (a) 68 (b) 0.068 (c) 6.8 (d) 0.68
  21. 21.0.79 × 15 — where does the decimal point go? (a) 118.5 (b) 1.185 (c) 11.85 (d) 0.1185
  22. 22.0.76 × 0.3 — where does the decimal point go? (a) 0.0228 (b) 0.00228 (c) 2.28 (d) 0.228
  23. 23.0.16 × 9 — where does the decimal point go? (a) 0.144 (b) 14.4 (c) 0.0144 (d) 1.44
  24. 24.0.63 × 0.7 — where does the decimal point go? (a) 0.441 (b) 4.41 (c) 0.0441 (d) 0.00441
  25. 25.0.23 × 9 — where does the decimal point go? (a) 2.07 (b) 0.0207 (c) 0.207 (d) 20.7
  26. 26.2.3 × 3 — where does the decimal point go? (a) 0.069 (b) 6.9 (c) 0.69 (d) 69
  27. 27.0.99 × 17 — where does the decimal point go? (a) 16.83 (b) 168.3 (c) 0.1683 (d) 1.683
  28. 28.8.5 × 23 — where does the decimal point go? (a) 1955 (b) 1.955 (c) 195.5 (d) 19.55
  29. 29.0.13 × 4 — where does the decimal point go? (a) 5.2 (b) 0.052 (c) 0.52 (d) 0.0052
  30. 30.0.93 × 4.5 — where does the decimal point go? (a) 0.4185 (b) 41.85 (c) 0.04185 (d) 4.185
  31. 31.4.3 × 35 — where does the decimal point go? (a) 1.505 (b) 15.05 (c) 1505 (d) 150.5
  32. 32.6.2 × 17 — where does the decimal point go? (a) 1.054 (b) 105.4 (c) 10.54 (d) 1054
  33. 33.6.7 × 9 — where does the decimal point go? (a) 603 (b) 6.03 (c) 60.3 (d) 0.603
  34. 34.2.1 × 0.2 — where does the decimal point go? (a) 0.42 (b) 4.2 (c) 0.042 (d) 0.0042
  35. 35.3.2 × 41 — where does the decimal point go? (a) 131.2 (b) 1312 (c) 13.12 (d) 1.312
  36. 36.0.18 × 0.6 — where does the decimal point go? (a) 1.08 (b) 0.108 (c) 0.0108 (d) 0.00108
  37. 37.0.32 × 2.6 — where does the decimal point go? (a) 8.32 (b) 0.832 (c) 0.00832 (d) 0.0832
  38. 38.9.7 × 22 — where does the decimal point go? (a) 2.134 (b) 21.34 (c) 2134 (d) 213.4
  39. 39.3.5 × 1.5 — where does the decimal point go? (a) 0.525 (b) 0.0525 (c) 5.25 (d) 52.5
  40. 40.0.73 × 0.6 — where does the decimal point go? (a) 0.438 (b) 0.0438 (c) 0.00438 (d) 4.38

Answer key

  1. 15.2
  2. 1.02
  3. 2.97
  4. 1.71
  5. 1.54
  6. 14.19
  7. 44.8
  8. 1.75
  9. 23.36
  10. 0.902
  11. 0.72
  12. 1.056
  13. 31.2
  14. 1.276
  15. 3.28
  16. 12.24
  17. 4.34
  18. 12.8
  19. 0.246
  20. 6.8
  21. 11.85
  22. 0.228
  23. 1.44
  24. 0.441
  25. 2.07
  26. 6.9
  27. 16.83
  28. 195.5
  29. 0.52
  30. 4.185
  31. 150.5
  32. 105.4
  33. 60.3
  34. 0.42
  35. 131.2
  36. 0.108
  37. 0.832
  38. 213.4
  39. 5.25
  40. 0.438

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