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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 210 · 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. 1.1.5 × 0.5 — where does the decimal point go? (a) 7.5 (b) 0.0075 (c) 0.075 (d) 0.75
  2. 2.8.5 × 1.9 — where does the decimal point go? (a) 161.5 (b) 1.615 (c) 16.15 (d) 0.1615
  3. 3.3.5 × 39 — where does the decimal point go? (a) 136.5 (b) 1365 (c) 13.65 (d) 1.365
  4. 4.0.29 × 2.2 — where does the decimal point go? (a) 0.0638 (b) 0.638 (c) 0.00638 (d) 6.38
  5. 5.7.1 × 0.6 — where does the decimal point go? (a) 4.26 (b) 0.426 (c) 42.6 (d) 0.0426
  6. 6.0.23 × 0.7 — where does the decimal point go? (a) 0.161 (b) 1.61 (c) 0.00161 (d) 0.0161
  7. 7.0.74 × 3 — where does the decimal point go? (a) 22.2 (b) 0.0222 (c) 2.22 (d) 0.222
  8. 8.0.42 × 0.8 — where does the decimal point go? (a) 0.0336 (b) 3.36 (c) 0.336 (d) 0.00336
  9. 9.0.92 × 0.3 — where does the decimal point go? (a) 0.00276 (b) 0.276 (c) 2.76 (d) 0.0276
  10. 10.2.9 × 9 — where does the decimal point go? (a) 261 (b) 2.61 (c) 26.1 (d) 0.261
  11. 11.0.72 × 17 — where does the decimal point go? (a) 12.24 (b) 1.224 (c) 0.1224 (d) 122.4
  12. 12.8.2 × 0.4 — where does the decimal point go? (a) 32.8 (b) 3.28 (c) 0.0328 (d) 0.328
  13. 13.0.72 × 43 — where does the decimal point go? (a) 309.6 (b) 0.3096 (c) 3.096 (d) 30.96
  14. 14.2.4 × 36 — where does the decimal point go? (a) 864 (b) 8.64 (c) 0.864 (d) 86.4
  15. 15.0.66 × 4 — where does the decimal point go? (a) 26.4 (b) 2.64 (c) 0.0264 (d) 0.264
  16. 16.0.12 × 0.7 — where does the decimal point go? (a) 0.00084 (b) 0.0084 (c) 0.84 (d) 0.084
  17. 17.0.29 × 1.8 — where does the decimal point go? (a) 5.22 (b) 0.00522 (c) 0.522 (d) 0.0522
  18. 18.0.98 × 4 — where does the decimal point go? (a) 0.0392 (b) 0.392 (c) 3.92 (d) 39.2
  19. 19.0.25 × 13 — where does the decimal point go? (a) 32.5 (b) 0.0325 (c) 3.25 (d) 0.325
  20. 20.0.68 × 4 — where does the decimal point go? (a) 27.2 (b) 0.0272 (c) 0.272 (d) 2.72
  21. 21.7.9 × 1.6 — where does the decimal point go? (a) 0.1264 (b) 126.4 (c) 12.64 (d) 1.264
  22. 22.8.9 × 3 — where does the decimal point go? (a) 26.7 (b) 0.267 (c) 267 (d) 2.67
  23. 23.7.6 × 36 — where does the decimal point go? (a) 2736 (b) 273.6 (c) 2.736 (d) 27.36
  24. 24.0.22 × 2.1 — where does the decimal point go? (a) 4.62 (b) 0.462 (c) 0.00462 (d) 0.0462
  25. 25.5.4 × 6 — where does the decimal point go? (a) 32.4 (b) 0.324 (c) 3.24 (d) 324
  26. 26.7.4 × 2.8 — where does the decimal point go? (a) 20.72 (b) 2.072 (c) 0.2072 (d) 207.2
  27. 27.6.9 × 4.3 — where does the decimal point go? (a) 29.67 (b) 0.2967 (c) 2.967 (d) 296.7
  28. 28.9.8 × 0.6 — where does the decimal point go? (a) 0.0588 (b) 58.8 (c) 5.88 (d) 0.588
  29. 29.4.6 × 0.7 — where does the decimal point go? (a) 32.2 (b) 0.0322 (c) 3.22 (d) 0.322
  30. 30.9.2 × 0.3 — where does the decimal point go? (a) 2.76 (b) 27.6 (c) 0.0276 (d) 0.276
  31. 31.0.41 × 2 — where does the decimal point go? (a) 0.082 (b) 0.0082 (c) 8.2 (d) 0.82
  32. 32.0.66 × 2.8 — where does the decimal point go? (a) 1.848 (b) 0.01848 (c) 0.1848 (d) 18.48
  33. 33.2.9 × 23 — where does the decimal point go? (a) 66.7 (b) 0.667 (c) 667 (d) 6.67
  34. 34.0.39 × 5 — where does the decimal point go? (a) 19.5 (b) 0.195 (c) 0.0195 (d) 1.95
  35. 35.2.7 × 0.8 — where does the decimal point go? (a) 0.216 (b) 2.16 (c) 21.6 (d) 0.0216
  36. 36.7.7 × 0.2 — where does the decimal point go? (a) 1.54 (b) 0.0154 (c) 15.4 (d) 0.154
  37. 37.0.67 × 3 — where does the decimal point go? (a) 20.1 (b) 2.01 (c) 0.201 (d) 0.0201
  38. 38.1.9 × 31 — where does the decimal point go? (a) 0.589 (b) 589 (c) 5.89 (d) 58.9
  39. 39.7.5 × 0.3 — where does the decimal point go? (a) 22.5 (b) 2.25 (c) 0.225 (d) 0.0225
  40. 40.0.62 × 24 — where does the decimal point go? (a) 148.8 (b) 0.1488 (c) 14.88 (d) 1.488

Answer key

  1. 0.75
  2. 16.15
  3. 136.5
  4. 0.638
  5. 4.26
  6. 0.161
  7. 2.22
  8. 0.336
  9. 0.276
  10. 26.1
  11. 12.24
  12. 3.28
  13. 30.96
  14. 86.4
  15. 2.64
  16. 0.084
  17. 0.522
  18. 3.92
  19. 3.25
  20. 2.72
  21. 12.64
  22. 26.7
  23. 273.6
  24. 0.462
  25. 32.4
  26. 20.72
  27. 29.67
  28. 5.88
  29. 3.22
  30. 2.76
  31. 0.82
  32. 1.848
  33. 66.7
  34. 1.95
  35. 2.16
  36. 1.54
  37. 2.01
  38. 58.9
  39. 2.25
  40. 14.88

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