A pile of sand took away 3/7, 2 10 cars for the first time. If you take 1/5 of the total, how many cars will you take? Solution1:210 ÷ 3/7×1/5

Solution 2: Because 3/7 of the total number was shipped out for the first time and 265,438+00 vehicles were transported away, it can be found that the sand of one vehicle accounts for 65,438+0/490 of the total number by 3/7 ÷ 265,438+00. Since we know that a car can carry 1/490, then we can carry it away.

Scheme 3: According to the fact that three transport vehicles are 2 10, and each vehicle is (2 10÷3), the total sediment transport capacity is (2 10÷3×7). Finally, what is 0/5 of the total number of 65438+, which is 2655. It can also be expressed as 210× 7/3×1/5; 2 10× 7/3 ÷ 5 ... There are many methods!