1。 The first time you drink 1/6, 1- 1/6=5/6. After adding water, there is still 5/6 of pure milk, and the second time you drink 1/5 is 5/6 * 1/5 = 65438.

2.( 1) One-way method * * * Available peaches x kg: 3/7X=6/ 13(x-3).

The solution is x=42.

A: There are 42 kilograms of peaches.

(2) The ratio method assumes that A has one kilogram, so B is 7/6 kilograms after selling three kilograms.

(7/6A+3): A = 4: 3。

Calculate a = 18kg.

7/6a+3=24 kg

A 18 B 24 total * * * 42kg.

3. Method 1: Solve the problem that Xiaohong has an X card.

5/7X-5= 1/2(x+5)

x=35

5/7X=25

25+35=60 sheets

A: * * * There are 60.

Method 2: Let Xiaohong have an original A.

(5/7a-5):a+5= 1/2

a=35

5/7a=25

25+35=60

A: ...........

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