This kind of topic can divide the whole into several parts, and the total number of its parts is equal to the sum of the proportions of its parts. Then we can know the scores of each part in the headquarters score, and then multiply the actual values by their corresponding scores.

For example, the first question, the whole is liquid medicine, which consists of powder and water. The mass ratio of powder to water is 1: 25. We can regard the potion as 26, so the powder is 1/26, the water is 25/26, and the powder is =520*25/26=500kg.

Similarly, the second question: because it is an isosceles triangle, it is ∠ 1 or ∠2. If ∠ 1 is one of the equilateral corners, the total number of copies is 33, and ∠ 1=360 is divided by 10/33. if

On the third day, the total number of copies is 8, and the money used accounts for 3 copies = 100 times 3/8.