We all know that 1 plus 100 equals 5050, so the first question is actually 5050-4-8-96- 100, so you can figure out how much you get, because addition and subtraction are not sequential.

The second question is not big, hehe.

Question 2: I did this.

Divide 650 by (7/5-3/4) to get 1000, 1000+650, which is a * * * book, and then calculate according to the ratio of 7: 5 to get the original books of A and B, but why are the numbers not integers? So I don't know if it's right.

Will there be a binary linear equation in the sixth grade of primary school?