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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 181 · 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 × 0.9 — where does the decimal point go? (a) 0.333 (b) 3.33 (c) 0.0333 (d) 33.3
  2. 2.0.47 × 46 — where does the decimal point go? (a) 0.2162 (b) 21.62 (c) 216.2 (d) 2.162
  3. 3.0.16 × 0.7 — where does the decimal point go? (a) 0.112 (b) 0.00112 (c) 0.0112 (d) 1.12
  4. 4.0.68 × 3 — where does the decimal point go? (a) 20.4 (b) 0.0204 (c) 0.204 (d) 2.04
  5. 5.0.28 × 3.7 — where does the decimal point go? (a) 10.36 (b) 1.036 (c) 0.01036 (d) 0.1036
  6. 6.0.62 × 4 — where does the decimal point go? (a) 2.48 (b) 0.0248 (c) 24.8 (d) 0.248
  7. 7.0.32 × 33 — where does the decimal point go? (a) 0.1056 (b) 105.6 (c) 1.056 (d) 10.56
  8. 8.8.1 × 0.9 — where does the decimal point go? (a) 72.9 (b) 7.29 (c) 0.0729 (d) 0.729
  9. 9.6.3 × 9 — where does the decimal point go? (a) 56.7 (b) 0.567 (c) 5.67 (d) 567
  10. 10.8.1 × 0.2 — where does the decimal point go? (a) 0.0162 (b) 1.62 (c) 16.2 (d) 0.162
  11. 11.9.6 × 7 — where does the decimal point go? (a) 0.672 (b) 67.2 (c) 6.72 (d) 672
  12. 12.0.15 × 43 — where does the decimal point go? (a) 0.645 (b) 64.5 (c) 0.0645 (d) 6.45
  13. 13.3.8 × 3.9 — where does the decimal point go? (a) 148.2 (b) 1.482 (c) 0.1482 (d) 14.82
  14. 14.1.3 × 2 — where does the decimal point go? (a) 2.6 (b) 0.26 (c) 26 (d) 0.026
  15. 15.0.78 × 3 — where does the decimal point go? (a) 23.4 (b) 0.234 (c) 2.34 (d) 0.0234
  16. 16.0.26 × 9 — where does the decimal point go? (a) 0.234 (b) 23.4 (c) 2.34 (d) 0.0234
  17. 17.6.6 × 1.1 — where does the decimal point go? (a) 7.26 (b) 0.726 (c) 0.0726 (d) 72.6
  18. 18.3.7 × 36 — where does the decimal point go? (a) 1.332 (b) 133.2 (c) 13.32 (d) 1332
  19. 19.8.5 × 21 — where does the decimal point go? (a) 17.85 (b) 1.785 (c) 178.5 (d) 1785
  20. 20.0.54 × 47 — where does the decimal point go? (a) 25.38 (b) 0.2538 (c) 2.538 (d) 253.8
  21. 21.4.3 × 42 — where does the decimal point go? (a) 1806 (b) 18.06 (c) 1.806 (d) 180.6
  22. 22.3.2 × 3 — where does the decimal point go? (a) 9.6 (b) 0.096 (c) 96 (d) 0.96
  23. 23.7.6 × 0.6 — where does the decimal point go? (a) 45.6 (b) 0.0456 (c) 0.456 (d) 4.56
  24. 24.0.39 × 0.3 — where does the decimal point go? (a) 0.117 (b) 1.17 (c) 0.00117 (d) 0.0117
  25. 25.2.1 × 25 — where does the decimal point go? (a) 52.5 (b) 5.25 (c) 0.525 (d) 525
  26. 26.8.9 × 0.2 — where does the decimal point go? (a) 17.8 (b) 0.0178 (c) 1.78 (d) 0.178
  27. 27.3.9 × 2.8 — where does the decimal point go? (a) 109.2 (b) 10.92 (c) 1.092 (d) 0.1092
  28. 28.1.2 × 4 — where does the decimal point go? (a) 48 (b) 0.048 (c) 4.8 (d) 0.48
  29. 29.0.77 × 4 — where does the decimal point go? (a) 30.8 (b) 0.308 (c) 3.08 (d) 0.0308
  30. 30.0.69 × 3 — where does the decimal point go? (a) 20.7 (b) 0.0207 (c) 2.07 (d) 0.207
  31. 31.4.4 × 27 — where does the decimal point go? (a) 118.8 (b) 11.88 (c) 1.188 (d) 1188
  32. 32.0.38 × 4 — where does the decimal point go? (a) 0.0152 (b) 0.152 (c) 1.52 (d) 15.2
  33. 33.9.3 × 4.6 — where does the decimal point go? (a) 427.8 (b) 4.278 (c) 0.4278 (d) 42.78
  34. 34.8.1 × 33 — where does the decimal point go? (a) 267.3 (b) 2673 (c) 26.73 (d) 2.673
  35. 35.0.17 × 3 — where does the decimal point go? (a) 0.051 (b) 0.51 (c) 5.1 (d) 0.0051
  36. 36.1.6 × 2.2 — where does the decimal point go? (a) 0.0352 (b) 3.52 (c) 35.2 (d) 0.352
  37. 37.7.4 × 47 — where does the decimal point go? (a) 3.478 (b) 34.78 (c) 3478 (d) 347.8
  38. 38.0.88 × 7 — where does the decimal point go? (a) 6.16 (b) 0.0616 (c) 61.6 (d) 0.616
  39. 39.0.14 × 2 — where does the decimal point go? (a) 0.28 (b) 0.028 (c) 2.8 (d) 0.0028
  40. 40.0.79 × 4.8 — where does the decimal point go? (a) 37.92 (b) 3.792 (c) 0.3792 (d) 0.03792

Answer key

  1. 3.33
  2. 21.62
  3. 0.112
  4. 2.04
  5. 1.036
  6. 2.48
  7. 10.56
  8. 7.29
  9. 56.7
  10. 1.62
  11. 67.2
  12. 6.45
  13. 14.82
  14. 2.6
  15. 2.34
  16. 2.34
  17. 7.26
  18. 133.2
  19. 178.5
  20. 25.38
  21. 180.6
  22. 9.6
  23. 4.56
  24. 0.117
  25. 52.5
  26. 1.78
  27. 10.92
  28. 4.8
  29. 3.08
  30. 2.07
  31. 118.8
  32. 1.52
  33. 42.78
  34. 267.3
  35. 0.51
  36. 3.52
  37. 347.8
  38. 6.16
  39. 0.28
  40. 3.792

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