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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 135 · 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. 1.5.7 × 2.6 — where does the decimal point go? (a) 148.2 (b) 0.1482 (c) 1.482 (d) 14.82
  2. 2.6.7 × 1.4 — where does the decimal point go? (a) 0.938 (b) 93.8 (c) 0.0938 (d) 9.38
  3. 3.2.2 × 2 — where does the decimal point go? (a) 4.4 (b) 0.044 (c) 44 (d) 0.44
  4. 4.2.1 × 3 — where does the decimal point go? (a) 0.63 (b) 6.3 (c) 63 (d) 0.063
  5. 5.0.71 × 3.5 — where does the decimal point go? (a) 0.02485 (b) 24.85 (c) 2.485 (d) 0.2485
  6. 6.1.4 × 2 — where does the decimal point go? (a) 2.8 (b) 0.028 (c) 0.28 (d) 28
  7. 7.5.2 × 7 — where does the decimal point go? (a) 36.4 (b) 364 (c) 0.364 (d) 3.64
  8. 8.0.92 × 0.8 — where does the decimal point go? (a) 0.0736 (b) 0.736 (c) 0.00736 (d) 7.36
  9. 9.7.2 × 7 — where does the decimal point go? (a) 0.504 (b) 504 (c) 5.04 (d) 50.4
  10. 10.0.98 × 4.3 — where does the decimal point go? (a) 0.4214 (b) 0.04214 (c) 4.214 (d) 42.14
  11. 11.0.92 × 7 — where does the decimal point go? (a) 0.0644 (b) 64.4 (c) 0.644 (d) 6.44
  12. 12.6.8 × 27 — where does the decimal point go? (a) 1836 (b) 1.836 (c) 183.6 (d) 18.36
  13. 13.0.94 × 1.3 — where does the decimal point go? (a) 0.1222 (b) 0.01222 (c) 1.222 (d) 12.22
  14. 14.0.84 × 2.4 — where does the decimal point go? (a) 20.16 (b) 0.2016 (c) 0.02016 (d) 2.016
  15. 15.2.7 × 5 — where does the decimal point go? (a) 13.5 (b) 1.35 (c) 0.135 (d) 135
  16. 16.0.26 × 0.7 — where does the decimal point go? (a) 1.82 (b) 0.182 (c) 0.0182 (d) 0.00182
  17. 17.1.9 × 8 — where does the decimal point go? (a) 1.52 (b) 15.2 (c) 152 (d) 0.152
  18. 18.6.7 × 0.5 — where does the decimal point go? (a) 0.0335 (b) 0.335 (c) 3.35 (d) 33.5
  19. 19.9.9 × 3.2 — where does the decimal point go? (a) 0.3168 (b) 316.8 (c) 3.168 (d) 31.68
  20. 20.0.84 × 1.8 — where does the decimal point go? (a) 15.12 (b) 0.01512 (c) 1.512 (d) 0.1512
  21. 21.6.9 × 7 — where does the decimal point go? (a) 48.3 (b) 4.83 (c) 0.483 (d) 483
  22. 22.9.3 × 4 — where does the decimal point go? (a) 37.2 (b) 3.72 (c) 0.372 (d) 372
  23. 23.0.72 × 9 — where does the decimal point go? (a) 0.648 (b) 64.8 (c) 6.48 (d) 0.0648
  24. 24.0.69 × 14 — where does the decimal point go? (a) 9.66 (b) 96.6 (c) 0.0966 (d) 0.966
  25. 25.2.8 × 0.9 — where does the decimal point go? (a) 0.0252 (b) 2.52 (c) 25.2 (d) 0.252
  26. 26.3.3 × 46 — where does the decimal point go? (a) 15.18 (b) 151.8 (c) 1518 (d) 1.518
  27. 27.5.2 × 2 — where does the decimal point go? (a) 0.104 (b) 1.04 (c) 104 (d) 10.4
  28. 28.0.43 × 15 — where does the decimal point go? (a) 64.5 (b) 0.0645 (c) 6.45 (d) 0.645
  29. 29.3.8 × 21 — where does the decimal point go? (a) 0.798 (b) 79.8 (c) 798 (d) 7.98
  30. 30.4.7 × 4.2 — where does the decimal point go? (a) 197.4 (b) 0.1974 (c) 1.974 (d) 19.74
  31. 31.0.62 × 16 — where does the decimal point go? (a) 99.2 (b) 9.92 (c) 0.992 (d) 0.0992
  32. 32.0.24 × 12 — where does the decimal point go? (a) 0.288 (b) 0.0288 (c) 28.8 (d) 2.88
  33. 33.0.79 × 2.9 — where does the decimal point go? (a) 0.02291 (b) 2.291 (c) 0.2291 (d) 22.91
  34. 34.0.36 × 21 — where does the decimal point go? (a) 7.56 (b) 0.0756 (c) 75.6 (d) 0.756
  35. 35.9.3 × 4.3 — where does the decimal point go? (a) 0.3999 (b) 399.9 (c) 3.999 (d) 39.99
  36. 36.5.7 × 0.8 — where does the decimal point go? (a) 0.456 (b) 45.6 (c) 4.56 (d) 0.0456
  37. 37.8.1 × 5 — where does the decimal point go? (a) 40.5 (b) 0.405 (c) 4.05 (d) 405
  38. 38.0.23 × 1.4 — where does the decimal point go? (a) 0.322 (b) 0.00322 (c) 3.22 (d) 0.0322
  39. 39.3.6 × 0.4 — where does the decimal point go? (a) 0.0144 (b) 0.144 (c) 14.4 (d) 1.44
  40. 40.0.64 × 2 — where does the decimal point go? (a) 0.0128 (b) 1.28 (c) 0.128 (d) 12.8

Answer key

  1. 14.82
  2. 9.38
  3. 4.4
  4. 6.3
  5. 2.485
  6. 2.8
  7. 36.4
  8. 0.736
  9. 50.4
  10. 4.214
  11. 6.44
  12. 183.6
  13. 1.222
  14. 2.016
  15. 13.5
  16. 0.182
  17. 15.2
  18. 3.35
  19. 31.68
  20. 1.512
  21. 48.3
  22. 37.2
  23. 6.48
  24. 9.66
  25. 2.52
  26. 151.8
  27. 10.4
  28. 6.45
  29. 79.8
  30. 19.74
  31. 9.92
  32. 2.88
  33. 2.291
  34. 7.56
  35. 39.99
  36. 4.56
  37. 40.5
  38. 0.322
  39. 1.44
  40. 1.28

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