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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 715 · 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. 1.0.54 × 4.8 — where does the decimal point go? (a) 0.02592 (b) 0.2592 (c) 2.592 (d) 25.92
  2. 2.0.83 × 0.2 — where does the decimal point go? (a) 1.66 (b) 0.166 (c) 0.00166 (d) 0.0166
  3. 3.9.8 × 3 — where does the decimal point go? (a) 2.94 (b) 294 (c) 29.4 (d) 0.294
  4. 4.0.75 × 29 — where does the decimal point go? (a) 2.175 (b) 217.5 (c) 21.75 (d) 0.2175
  5. 5.0.42 × 36 — where does the decimal point go? (a) 0.1512 (b) 15.12 (c) 1.512 (d) 151.2
  6. 6.1.3 × 2.2 — where does the decimal point go? (a) 0.0286 (b) 2.86 (c) 28.6 (d) 0.286
  7. 7.2.8 × 7 — where does the decimal point go? (a) 19.6 (b) 196 (c) 1.96 (d) 0.196
  8. 8.0.99 × 0.9 — where does the decimal point go? (a) 0.891 (b) 0.0891 (c) 8.91 (d) 0.00891
  9. 9.9.7 × 5 — where does the decimal point go? (a) 48.5 (b) 0.485 (c) 485 (d) 4.85
  10. 10.7.7 × 3 — where does the decimal point go? (a) 231 (b) 23.1 (c) 0.231 (d) 2.31
  11. 11.0.91 × 4.5 — where does the decimal point go? (a) 40.95 (b) 4.095 (c) 0.4095 (d) 0.04095
  12. 12.9.6 × 4.3 — where does the decimal point go? (a) 0.4128 (b) 412.8 (c) 4.128 (d) 41.28
  13. 13.7.3 × 8 — where does the decimal point go? (a) 0.584 (b) 58.4 (c) 584 (d) 5.84
  14. 14.0.89 × 5 — where does the decimal point go? (a) 4.45 (b) 44.5 (c) 0.445 (d) 0.0445
  15. 15.0.85 × 0.9 — where does the decimal point go? (a) 0.0765 (b) 0.765 (c) 7.65 (d) 0.00765
  16. 16.1.7 × 7 — where does the decimal point go? (a) 0.119 (b) 1.19 (c) 119 (d) 11.9
  17. 17.9.1 × 3.2 — where does the decimal point go? (a) 0.2912 (b) 29.12 (c) 2.912 (d) 291.2
  18. 18.2.9 × 1.8 — where does the decimal point go? (a) 5.22 (b) 0.522 (c) 0.0522 (d) 52.2
  19. 19.0.29 × 8 — where does the decimal point go? (a) 0.232 (b) 0.0232 (c) 2.32 (d) 23.2
  20. 20.0.56 × 9 — where does the decimal point go? (a) 0.0504 (b) 50.4 (c) 5.04 (d) 0.504
  21. 21.0.24 × 8 — where does the decimal point go? (a) 1.92 (b) 0.0192 (c) 19.2 (d) 0.192
  22. 22.0.16 × 7 — where does the decimal point go? (a) 0.112 (b) 0.0112 (c) 11.2 (d) 1.12
  23. 23.8.3 × 4.9 — where does the decimal point go? (a) 4.067 (b) 0.4067 (c) 40.67 (d) 406.7
  24. 24.0.64 × 3.9 — where does the decimal point go? (a) 24.96 (b) 0.2496 (c) 0.02496 (d) 2.496
  25. 25.8.8 × 7 — where does the decimal point go? (a) 0.616 (b) 6.16 (c) 616 (d) 61.6
  26. 26.0.27 × 2 — where does the decimal point go? (a) 0.054 (b) 5.4 (c) 0.54 (d) 0.0054
  27. 27.4.1 × 16 — where does the decimal point go? (a) 0.656 (b) 65.6 (c) 656 (d) 6.56
  28. 28.3.9 × 0.2 — where does the decimal point go? (a) 7.8 (b) 0.78 (c) 0.078 (d) 0.0078
  29. 29.0.29 × 2.3 — where does the decimal point go? (a) 0.667 (b) 6.67 (c) 0.0667 (d) 0.00667
  30. 30.9.7 × 34 — where does the decimal point go? (a) 3.298 (b) 32.98 (c) 3298 (d) 329.8
  31. 31.0.77 × 19 — where does the decimal point go? (a) 1.463 (b) 0.1463 (c) 146.3 (d) 14.63
  32. 32.0.61 × 4.1 — where does the decimal point go? (a) 25.01 (b) 2.501 (c) 0.02501 (d) 0.2501
  33. 33.1.5 × 7 — where does the decimal point go? (a) 105 (b) 1.05 (c) 0.105 (d) 10.5
  34. 34.0.23 × 8 — where does the decimal point go? (a) 1.84 (b) 0.184 (c) 18.4 (d) 0.0184
  35. 35.3.2 × 23 — where does the decimal point go? (a) 7.36 (b) 73.6 (c) 736 (d) 0.736
  36. 36.0.67 × 48 — where does the decimal point go? (a) 321.6 (b) 0.3216 (c) 32.16 (d) 3.216
  37. 37.0.91 × 0.2 — where does the decimal point go? (a) 0.0182 (b) 0.182 (c) 1.82 (d) 0.00182
  38. 38.2.8 × 0.6 — where does the decimal point go? (a) 0.168 (b) 1.68 (c) 16.8 (d) 0.0168
  39. 39.4.4 × 4.1 — where does the decimal point go? (a) 18.04 (b) 0.1804 (c) 180.4 (d) 1.804
  40. 40.0.43 × 46 — where does the decimal point go? (a) 1.978 (b) 197.8 (c) 0.1978 (d) 19.78

Answer key

  1. 2.592
  2. 0.166
  3. 29.4
  4. 21.75
  5. 15.12
  6. 2.86
  7. 19.6
  8. 0.891
  9. 48.5
  10. 23.1
  11. 4.095
  12. 41.28
  13. 58.4
  14. 4.45
  15. 0.765
  16. 11.9
  17. 29.12
  18. 5.22
  19. 2.32
  20. 5.04
  21. 1.92
  22. 1.12
  23. 40.67
  24. 2.496
  25. 61.6
  26. 0.54
  27. 65.6
  28. 0.78
  29. 0.667
  30. 329.8
  31. 14.63
  32. 2.501
  33. 10.5
  34. 1.84
  35. 73.6
  36. 32.16
  37. 0.182
  38. 1.68
  39. 18.04
  40. 19.78

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