Discussion
In which of the following, lengths have been arranged in decreasing order ?
Answer: D
The decreasing order is 8500 mm, 80 dm 8 cm, 800 cm 8 mm, 8 m.
Convert all four lengths to centimetres:
- 8500 mm = 850 cm
- 80 dm 8 cm = 800 cm + 8 cm = 808 cm
- 800 cm 8 mm = 800.8 cm
- 8 m = 800 cm
From largest to smallest: 850, 808, 800.8, 800, which is the fourth option. The first option puts 800 cm 8 mm before 80 dm 8 cm, and the others start with a smaller length.
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