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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 372 · 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. 1.1.7 × 36 — where does the decimal point go? (a) 61.2 (b) 6.12 (c) 612 (d) 0.612
  2. 2.9.5 × 7 — where does the decimal point go? (a) 0.665 (b) 66.5 (c) 6.65 (d) 665
  3. 3.0.41 × 9 — where does the decimal point go? (a) 0.369 (b) 36.9 (c) 3.69 (d) 0.0369
  4. 4.0.66 × 4 — where does the decimal point go? (a) 0.264 (b) 0.0264 (c) 2.64 (d) 26.4
  5. 5.4.9 × 11 — where does the decimal point go? (a) 5.39 (b) 53.9 (c) 0.539 (d) 539
  6. 6.0.26 × 49 — where does the decimal point go? (a) 12.74 (b) 0.1274 (c) 1.274 (d) 127.4
  7. 7.3.2 × 0.7 — where does the decimal point go? (a) 0.224 (b) 0.0224 (c) 22.4 (d) 2.24
  8. 8.4.9 × 0.8 — where does the decimal point go? (a) 0.392 (b) 3.92 (c) 0.0392 (d) 39.2
  9. 9.2.5 × 0.5 — where does the decimal point go? (a) 1.25 (b) 12.5 (c) 0.125 (d) 0.0125
  10. 10.1.3 × 1.8 — where does the decimal point go? (a) 23.4 (b) 0.234 (c) 0.0234 (d) 2.34
  11. 11.1.8 × 48 — where does the decimal point go? (a) 86.4 (b) 0.864 (c) 864 (d) 8.64
  12. 12.3.3 × 43 — where does the decimal point go? (a) 14.19 (b) 1.419 (c) 1419 (d) 141.9
  13. 13.0.29 × 4.6 — where does the decimal point go? (a) 13.34 (b) 0.1334 (c) 1.334 (d) 0.01334
  14. 14.7.3 × 0.2 — where does the decimal point go? (a) 0.0146 (b) 1.46 (c) 0.146 (d) 14.6
  15. 15.5.9 × 31 — where does the decimal point go? (a) 1829 (b) 1.829 (c) 182.9 (d) 18.29
  16. 16.0.64 × 4 — where does the decimal point go? (a) 2.56 (b) 0.256 (c) 0.0256 (d) 25.6
  17. 17.6.1 × 0.6 — where does the decimal point go? (a) 3.66 (b) 36.6 (c) 0.0366 (d) 0.366
  18. 18.0.49 × 15 — where does the decimal point go? (a) 7.35 (b) 0.0735 (c) 73.5 (d) 0.735
  19. 19.3.4 × 6 — where does the decimal point go? (a) 20.4 (b) 2.04 (c) 0.204 (d) 204
  20. 20.6.7 × 45 — where does the decimal point go? (a) 3015 (b) 30.15 (c) 3.015 (d) 301.5
  21. 21.7.5 × 1.1 — where does the decimal point go? (a) 82.5 (b) 0.825 (c) 8.25 (d) 0.0825
  22. 22.0.49 × 18 — where does the decimal point go? (a) 8.82 (b) 88.2 (c) 0.882 (d) 0.0882
  23. 23.3.3 × 14 — where does the decimal point go? (a) 46.2 (b) 4.62 (c) 0.462 (d) 462
  24. 24.0.15 × 3 — where does the decimal point go? (a) 0.45 (b) 0.0045 (c) 4.5 (d) 0.045
  25. 25.6.8 × 1.2 — where does the decimal point go? (a) 0.816 (b) 0.0816 (c) 81.6 (d) 8.16
  26. 26.7.1 × 6 — where does the decimal point go? (a) 4.26 (b) 42.6 (c) 426 (d) 0.426
  27. 27.0.52 × 2 — where does the decimal point go? (a) 10.4 (b) 0.104 (c) 0.0104 (d) 1.04
  28. 28.0.92 × 7 — where does the decimal point go? (a) 0.644 (b) 6.44 (c) 0.0644 (d) 64.4
  29. 29.4.4 × 8 — where does the decimal point go? (a) 3.52 (b) 0.352 (c) 35.2 (d) 352
  30. 30.1.3 × 0.9 — where does the decimal point go? (a) 0.0117 (b) 1.17 (c) 0.117 (d) 11.7
  31. 31.6.1 × 0.3 — where does the decimal point go? (a) 0.183 (b) 0.0183 (c) 1.83 (d) 18.3
  32. 32.0.23 × 3 — where does the decimal point go? (a) 0.69 (b) 6.9 (c) 0.0069 (d) 0.069
  33. 33.7.4 × 0.9 — where does the decimal point go? (a) 66.6 (b) 0.0666 (c) 0.666 (d) 6.66
  34. 34.0.36 × 8 — where does the decimal point go? (a) 0.288 (b) 28.8 (c) 2.88 (d) 0.0288
  35. 35.4.8 × 4 — where does the decimal point go? (a) 0.192 (b) 192 (c) 1.92 (d) 19.2
  36. 36.8.7 × 15 — where does the decimal point go? (a) 13.05 (b) 1305 (c) 130.5 (d) 1.305
  37. 37.0.94 × 0.3 — where does the decimal point go? (a) 0.00282 (b) 0.0282 (c) 2.82 (d) 0.282
  38. 38.3.7 × 0.4 — where does the decimal point go? (a) 0.0148 (b) 14.8 (c) 1.48 (d) 0.148
  39. 39.4.7 × 0.2 — where does the decimal point go? (a) 0.94 (b) 0.0094 (c) 9.4 (d) 0.094
  40. 40.9.1 × 0.8 — where does the decimal point go? (a) 7.28 (b) 0.0728 (c) 72.8 (d) 0.728

Answer key

  1. 61.2
  2. 66.5
  3. 3.69
  4. 2.64
  5. 53.9
  6. 12.74
  7. 2.24
  8. 3.92
  9. 1.25
  10. 2.34
  11. 86.4
  12. 141.9
  13. 1.334
  14. 1.46
  15. 182.9
  16. 2.56
  17. 3.66
  18. 7.35
  19. 20.4
  20. 301.5
  21. 8.25
  22. 8.82
  23. 46.2
  24. 0.45
  25. 8.16
  26. 42.6
  27. 1.04
  28. 6.44
  29. 35.2
  30. 1.17
  31. 1.83
  32. 0.69
  33. 6.66
  34. 2.88
  35. 19.2
  36. 130.5
  37. 0.282
  38. 1.48
  39. 0.94
  40. 7.28

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