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Decimal Point Trick Worksheet

Maths tricks trick 24: Where does the decimal point go? · Set 248 · 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. 1.0.51 × 3 — where does the decimal point go? (a) 1.53 (b) 0.0153 (c) 0.153 (d) 15.3
  2. 2.9.4 × 4 — where does the decimal point go? (a) 376 (b) 0.376 (c) 37.6 (d) 3.76
  3. 3.3.8 × 12 — where does the decimal point go? (a) 45.6 (b) 456 (c) 4.56 (d) 0.456
  4. 4.6.5 × 9 — where does the decimal point go? (a) 585 (b) 5.85 (c) 58.5 (d) 0.585
  5. 5.0.36 × 0.7 — where does the decimal point go? (a) 0.252 (b) 2.52 (c) 0.00252 (d) 0.0252
  6. 6.5.3 × 8 — where does the decimal point go? (a) 42.4 (b) 424 (c) 4.24 (d) 0.424
  7. 7.0.97 × 12 — where does the decimal point go? (a) 0.1164 (b) 1.164 (c) 116.4 (d) 11.64
  8. 8.0.22 × 9 — where does the decimal point go? (a) 19.8 (b) 1.98 (c) 0.198 (d) 0.0198
  9. 9.3.7 × 41 — where does the decimal point go? (a) 15.17 (b) 1.517 (c) 151.7 (d) 1517
  10. 10.2.4 × 0.4 — where does the decimal point go? (a) 0.096 (b) 0.0096 (c) 0.96 (d) 9.6
  11. 11.0.32 × 23 — where does the decimal point go? (a) 73.6 (b) 0.0736 (c) 7.36 (d) 0.736
  12. 12.0.27 × 3 — where does the decimal point go? (a) 0.081 (b) 0.81 (c) 0.0081 (d) 8.1
  13. 13.0.73 × 15 — where does the decimal point go? (a) 10.95 (b) 1.095 (c) 0.1095 (d) 109.5
  14. 14.6.9 × 0.6 — where does the decimal point go? (a) 0.0414 (b) 0.414 (c) 4.14 (d) 41.4
  15. 15.3.4 × 42 — where does the decimal point go? (a) 1.428 (b) 1428 (c) 142.8 (d) 14.28
  16. 16.8.1 × 8 — where does the decimal point go? (a) 648 (b) 64.8 (c) 0.648 (d) 6.48
  17. 17.0.14 × 1.3 — where does the decimal point go? (a) 0.00182 (b) 0.182 (c) 0.0182 (d) 1.82
  18. 18.5.7 × 26 — where does the decimal point go? (a) 1482 (b) 14.82 (c) 148.2 (d) 1.482
  19. 19.0.86 × 3.8 — where does the decimal point go? (a) 32.68 (b) 0.03268 (c) 0.3268 (d) 3.268
  20. 20.9.4 × 9 — where does the decimal point go? (a) 8.46 (b) 846 (c) 84.6 (d) 0.846
  21. 21.5.9 × 18 — where does the decimal point go? (a) 1.062 (b) 10.62 (c) 1062 (d) 106.2
  22. 22.0.28 × 7 — where does the decimal point go? (a) 0.0196 (b) 19.6 (c) 1.96 (d) 0.196
  23. 23.1.2 × 47 — where does the decimal point go? (a) 56.4 (b) 564 (c) 0.564 (d) 5.64
  24. 24.3.9 × 0.3 — where does the decimal point go? (a) 0.117 (b) 11.7 (c) 1.17 (d) 0.0117
  25. 25.3.3 × 5 — where does the decimal point go? (a) 1.65 (b) 0.165 (c) 165 (d) 16.5
  26. 26.0.67 × 0.8 — where does the decimal point go? (a) 0.00536 (b) 5.36 (c) 0.0536 (d) 0.536
  27. 27.9.2 × 0.2 — where does the decimal point go? (a) 0.0184 (b) 0.184 (c) 1.84 (d) 18.4
  28. 28.1.7 × 1.8 — where does the decimal point go? (a) 3.06 (b) 0.306 (c) 30.6 (d) 0.0306
  29. 29.0.44 × 0.7 — where does the decimal point go? (a) 0.0308 (b) 0.308 (c) 0.00308 (d) 3.08
  30. 30.5.6 × 4.7 — where does the decimal point go? (a) 263.2 (b) 26.32 (c) 2.632 (d) 0.2632
  31. 31.0.18 × 1.6 — where does the decimal point go? (a) 0.288 (b) 2.88 (c) 0.0288 (d) 0.00288
  32. 32.0.84 × 9 — where does the decimal point go? (a) 0.756 (b) 0.0756 (c) 7.56 (d) 75.6
  33. 33.6.4 × 47 — where does the decimal point go? (a) 300.8 (b) 3008 (c) 30.08 (d) 3.008
  34. 34.1.5 × 0.3 — where does the decimal point go? (a) 0.045 (b) 0.0045 (c) 4.5 (d) 0.45
  35. 35.2.6 × 4 — where does the decimal point go? (a) 1.04 (b) 10.4 (c) 104 (d) 0.104
  36. 36.7.9 × 0.2 — where does the decimal point go? (a) 1.58 (b) 0.158 (c) 0.0158 (d) 15.8
  37. 37.0.98 × 0.7 — where does the decimal point go? (a) 0.00686 (b) 0.686 (c) 0.0686 (d) 6.86
  38. 38.0.76 × 3 — where does the decimal point go? (a) 22.8 (b) 0.228 (c) 0.0228 (d) 2.28
  39. 39.0.53 × 31 — where does the decimal point go? (a) 1.643 (b) 16.43 (c) 164.3 (d) 0.1643
  40. 40.0.68 × 0.7 — where does the decimal point go? (a) 0.476 (b) 0.0476 (c) 0.00476 (d) 4.76

Answer key

  1. 1.53
  2. 37.6
  3. 45.6
  4. 58.5
  5. 0.252
  6. 42.4
  7. 11.64
  8. 1.98
  9. 151.7
  10. 0.96
  11. 7.36
  12. 0.81
  13. 10.95
  14. 4.14
  15. 142.8
  16. 64.8
  17. 0.182
  18. 148.2
  19. 3.268
  20. 84.6
  21. 106.2
  22. 1.96
  23. 56.4
  24. 1.17
  25. 16.5
  26. 0.536
  27. 1.84
  28. 3.06
  29. 0.308
  30. 26.32
  31. 0.288
  32. 7.56
  33. 300.8
  34. 0.45
  35. 10.4
  36. 1.58
  37. 0.686
  38. 2.28
  39. 16.43
  40. 0.476

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