Building a highway, after finishing 1 / 6 of the whole stadium, there are still 125 kilometers in the middle. How many meters is the total length of this highway?
Zjc, Zhou Jincheng,
125 (1 / 2-1 / 6) = 375 (km)
For a 210 meter long highway, 6 / 7 of the total length has been built in three days. How many meters have been built on average every day
Method 1: 210 times 6 / 7 divided by 3 equals 60 meters
Method 2: subtract the remaining paths from 210 and divide by 3, that is 210-210x (1-6 / 7) / 3
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