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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 206 · 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. 1.0.61 × 0.6 — where does the decimal point go? (a) 0.366 (b) 0.00366 (c) 0.0366 (d) 3.66
  2. 2.1.2 × 0.3 — where does the decimal point go? (a) 0.36 (b) 0.036 (c) 0.0036 (d) 3.6
  3. 3.2.9 × 0.3 — where does the decimal point go? (a) 8.7 (b) 0.087 (c) 0.0087 (d) 0.87
  4. 4.7.5 × 2.9 — where does the decimal point go? (a) 2.175 (b) 0.2175 (c) 217.5 (d) 21.75
  5. 5.8.7 × 0.3 — where does the decimal point go? (a) 0.261 (b) 2.61 (c) 26.1 (d) 0.0261
  6. 6.8.2 × 41 — where does the decimal point go? (a) 3.362 (b) 3362 (c) 33.62 (d) 336.2
  7. 7.4.7 × 0.5 — where does the decimal point go? (a) 0.235 (b) 23.5 (c) 2.35 (d) 0.0235
  8. 8.0.42 × 34 — where does the decimal point go? (a) 14.28 (b) 0.1428 (c) 142.8 (d) 1.428
  9. 9.4.3 × 0.6 — where does the decimal point go? (a) 2.58 (b) 0.258 (c) 0.0258 (d) 25.8
  10. 10.2.7 × 6 — where does the decimal point go? (a) 16.2 (b) 1.62 (c) 0.162 (d) 162
  11. 11.2.1 × 7 — where does the decimal point go? (a) 1.47 (b) 147 (c) 14.7 (d) 0.147
  12. 12.6.6 × 33 — where does the decimal point go? (a) 2.178 (b) 2178 (c) 21.78 (d) 217.8
  13. 13.3.4 × 0.6 — where does the decimal point go? (a) 0.204 (b) 0.0204 (c) 2.04 (d) 20.4
  14. 14.1.5 × 23 — where does the decimal point go? (a) 34.5 (b) 3.45 (c) 0.345 (d) 345
  15. 15.3.6 × 8 — where does the decimal point go? (a) 2.88 (b) 0.288 (c) 28.8 (d) 288
  16. 16.2.8 × 22 — where does the decimal point go? (a) 0.616 (b) 616 (c) 6.16 (d) 61.6
  17. 17.0.31 × 2.3 — where does the decimal point go? (a) 0.0713 (b) 0.713 (c) 7.13 (d) 0.00713
  18. 18.2.8 × 0.4 — where does the decimal point go? (a) 1.12 (b) 0.0112 (c) 0.112 (d) 11.2
  19. 19.2.1 × 0.7 — where does the decimal point go? (a) 0.147 (b) 14.7 (c) 0.0147 (d) 1.47
  20. 20.0.24 × 12 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 0.0288 (d) 28.8
  21. 21.0.13 × 1.5 — where does the decimal point go? (a) 1.95 (b) 0.0195 (c) 0.00195 (d) 0.195
  22. 22.0.41 × 3 — where does the decimal point go? (a) 1.23 (b) 0.123 (c) 12.3 (d) 0.0123
  23. 23.3.1 × 48 — where does the decimal point go? (a) 1488 (b) 148.8 (c) 1.488 (d) 14.88
  24. 24.0.31 × 0.7 — where does the decimal point go? (a) 0.217 (b) 2.17 (c) 0.0217 (d) 0.00217
  25. 25.7.8 × 0.4 — where does the decimal point go? (a) 3.12 (b) 0.312 (c) 0.0312 (d) 31.2
  26. 26.2.3 × 48 — where does the decimal point go? (a) 110.4 (b) 1.104 (c) 11.04 (d) 1104
  27. 27.0.34 × 3.3 — where does the decimal point go? (a) 0.1122 (b) 0.01122 (c) 1.122 (d) 11.22
  28. 28.0.32 × 0.3 — where does the decimal point go? (a) 0.0096 (b) 0.096 (c) 0.96 (d) 0.00096
  29. 29.7.9 × 0.8 — where does the decimal point go? (a) 0.0632 (b) 6.32 (c) 0.632 (d) 63.2
  30. 30.3.6 × 2.2 — where does the decimal point go? (a) 79.2 (b) 0.792 (c) 0.0792 (d) 7.92
  31. 31.8.9 × 6 — where does the decimal point go? (a) 53.4 (b) 534 (c) 5.34 (d) 0.534
  32. 32.0.79 × 2 — where does the decimal point go? (a) 0.0158 (b) 15.8 (c) 0.158 (d) 1.58
  33. 33.4.5 × 11 — where does the decimal point go? (a) 0.495 (b) 4.95 (c) 495 (d) 49.5
  34. 34.2.7 × 34 — where does the decimal point go? (a) 0.918 (b) 91.8 (c) 918 (d) 9.18
  35. 35.7.2 × 39 — where does the decimal point go? (a) 2.808 (b) 2808 (c) 280.8 (d) 28.08
  36. 36.4.4 × 1.6 — where does the decimal point go? (a) 0.0704 (b) 7.04 (c) 70.4 (d) 0.704
  37. 37.0.13 × 0.9 — where does the decimal point go? (a) 0.117 (b) 0.00117 (c) 1.17 (d) 0.0117
  38. 38.0.43 × 7 — where does the decimal point go? (a) 0.0301 (b) 30.1 (c) 3.01 (d) 0.301
  39. 39.4.1 × 0.7 — where does the decimal point go? (a) 2.87 (b) 0.287 (c) 0.0287 (d) 28.7
  40. 40.6.6 × 0.2 — where does the decimal point go? (a) 0.0132 (b) 13.2 (c) 0.132 (d) 1.32

Answer key

  1. 0.366
  2. 0.36
  3. 0.87
  4. 21.75
  5. 2.61
  6. 336.2
  7. 2.35
  8. 14.28
  9. 2.58
  10. 16.2
  11. 14.7
  12. 217.8
  13. 2.04
  14. 34.5
  15. 28.8
  16. 61.6
  17. 0.713
  18. 1.12
  19. 1.47
  20. 2.88
  21. 0.195
  22. 1.23
  23. 148.8
  24. 0.217
  25. 3.12
  26. 110.4
  27. 1.122
  28. 0.096
  29. 6.32
  30. 7.92
  31. 53.4
  32. 1.58
  33. 49.5
  34. 91.8
  35. 280.8
  36. 7.04
  37. 0.117
  38. 3.01
  39. 2.87
  40. 1.32

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