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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 673 · 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. 1.0.21 × 0.3 — where does the decimal point go? (a) 0.63 (b) 0.063 (c) 0.0063 (d) 0.00063
  2. 2.0.26 × 18 — where does the decimal point go? (a) 46.8 (b) 0.468 (c) 4.68 (d) 0.0468
  3. 3.0.78 × 4 — where does the decimal point go? (a) 0.312 (b) 31.2 (c) 0.0312 (d) 3.12
  4. 4.2.2 × 0.4 — where does the decimal point go? (a) 0.088 (b) 0.0088 (c) 8.8 (d) 0.88
  5. 5.2.2 × 16 — where does the decimal point go? (a) 0.352 (b) 352 (c) 35.2 (d) 3.52
  6. 6.8.7 × 49 — where does the decimal point go? (a) 426.3 (b) 42.63 (c) 4.263 (d) 4263
  7. 7.1.6 × 7 — where does the decimal point go? (a) 11.2 (b) 112 (c) 0.112 (d) 1.12
  8. 8.8.3 × 0.8 — where does the decimal point go? (a) 0.0664 (b) 0.664 (c) 6.64 (d) 66.4
  9. 9.5.6 × 7 — where does the decimal point go? (a) 3.92 (b) 0.392 (c) 39.2 (d) 392
  10. 10.0.44 × 6 — where does the decimal point go? (a) 0.264 (b) 2.64 (c) 0.0264 (d) 26.4
  11. 11.0.16 × 37 — where does the decimal point go? (a) 0.592 (b) 5.92 (c) 0.0592 (d) 59.2
  12. 12.9.9 × 4 — where does the decimal point go? (a) 396 (b) 39.6 (c) 0.396 (d) 3.96
  13. 13.0.63 × 34 — where does the decimal point go? (a) 21.42 (b) 0.2142 (c) 214.2 (d) 2.142
  14. 14.0.96 × 6 — where does the decimal point go? (a) 0.0576 (b) 5.76 (c) 57.6 (d) 0.576
  15. 15.7.3 × 36 — where does the decimal point go? (a) 2.628 (b) 26.28 (c) 262.8 (d) 2628
  16. 16.0.45 × 19 — where does the decimal point go? (a) 85.5 (b) 8.55 (c) 0.855 (d) 0.0855
  17. 17.8.6 × 2 — where does the decimal point go? (a) 172 (b) 0.172 (c) 1.72 (d) 17.2
  18. 18.0.44 × 3 — where does the decimal point go? (a) 1.32 (b) 0.132 (c) 13.2 (d) 0.0132
  19. 19.6.1 × 3.2 — where does the decimal point go? (a) 0.1952 (b) 195.2 (c) 1.952 (d) 19.52
  20. 20.9.1 × 27 — where does the decimal point go? (a) 245.7 (b) 2.457 (c) 2457 (d) 24.57
  21. 21.0.56 × 34 — where does the decimal point go? (a) 19.04 (b) 0.1904 (c) 1.904 (d) 190.4
  22. 22.5.1 × 4 — where does the decimal point go? (a) 0.204 (b) 2.04 (c) 20.4 (d) 204
  23. 23.5.9 × 0.6 — where does the decimal point go? (a) 3.54 (b) 0.0354 (c) 0.354 (d) 35.4
  24. 24.0.42 × 42 — where does the decimal point go? (a) 17.64 (b) 0.1764 (c) 176.4 (d) 1.764
  25. 25.3.7 × 0.3 — where does the decimal point go? (a) 1.11 (b) 0.0111 (c) 0.111 (d) 11.1
  26. 26.6.3 × 36 — where does the decimal point go? (a) 22.68 (b) 226.8 (c) 2.268 (d) 2268
  27. 27.0.41 × 28 — where does the decimal point go? (a) 11.48 (b) 0.1148 (c) 114.8 (d) 1.148
  28. 28.4.6 × 9 — where does the decimal point go? (a) 41.4 (b) 0.414 (c) 4.14 (d) 414
  29. 29.7.6 × 2 — where does the decimal point go? (a) 0.152 (b) 152 (c) 15.2 (d) 1.52
  30. 30.3.7 × 21 — where does the decimal point go? (a) 0.777 (b) 777 (c) 7.77 (d) 77.7
  31. 31.8.1 × 0.5 — where does the decimal point go? (a) 4.05 (b) 0.0405 (c) 40.5 (d) 0.405
  32. 32.7.2 × 17 — where does the decimal point go? (a) 12.24 (b) 1224 (c) 122.4 (d) 1.224
  33. 33.0.13 × 0.8 — where does the decimal point go? (a) 0.0104 (b) 0.00104 (c) 0.104 (d) 1.04
  34. 34.4.6 × 7 — where does the decimal point go? (a) 3.22 (b) 0.322 (c) 322 (d) 32.2
  35. 35.0.75 × 0.9 — where does the decimal point go? (a) 6.75 (b) 0.675 (c) 0.00675 (d) 0.0675
  36. 36.0.34 × 4 — where does the decimal point go? (a) 1.36 (b) 13.6 (c) 0.0136 (d) 0.136
  37. 37.1.8 × 48 — where does the decimal point go? (a) 8.64 (b) 864 (c) 86.4 (d) 0.864
  38. 38.0.34 × 0.3 — where does the decimal point go? (a) 0.0102 (b) 0.00102 (c) 0.102 (d) 1.02
  39. 39.2.7 × 2 — where does the decimal point go? (a) 0.054 (b) 54 (c) 0.54 (d) 5.4
  40. 40.0.64 × 3.4 — where does the decimal point go? (a) 2.176 (b) 0.2176 (c) 21.76 (d) 0.02176

Answer key

  1. 0.063
  2. 4.68
  3. 3.12
  4. 0.88
  5. 35.2
  6. 426.3
  7. 11.2
  8. 6.64
  9. 39.2
  10. 2.64
  11. 5.92
  12. 39.6
  13. 21.42
  14. 5.76
  15. 262.8
  16. 8.55
  17. 17.2
  18. 1.32
  19. 19.52
  20. 245.7
  21. 19.04
  22. 20.4
  23. 3.54
  24. 17.64
  25. 1.11
  26. 226.8
  27. 11.48
  28. 41.4
  29. 15.2
  30. 77.7
  31. 4.05
  32. 122.4
  33. 0.104
  34. 32.2
  35. 0.675
  36. 1.36
  37. 86.4
  38. 0.102
  39. 5.4
  40. 2.176

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