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Mathematical solution of the second volume of the fifth grade
1 How many tons of white paper can be produced per ton of waste paper on average?

Solution: According to the meaning of the question, it is assumed that each ton of waste paper can produce about X tons of white paper.

X=2.4÷3

x=0.8

A: On average, about 0.8 tons of white paper can be produced per ton of waste paper.

2 Recycling 1 ton of waste paper is roughly equivalent to cutting down many trees?

Solution: Suppose recycling one ton of waste paper is equivalent to cutting down X fewer trees.

x=5 1÷3

x= 17

A: Recycling one ton of waste paper is equivalent to cutting down 17 trees.