Mathematical wisdom island

1, 5 1 class boy x, 52 class girl 3x, 52 class boy y, 5 1 class girl 4y, total number, etc. X+4y=3x+y, that is, 3y=2x, x/y=3/2, y is 2, x is 3,51class girl 4y/class girl 3x = (4 *.

2.a x, B Y. The decimal point of a number is shifted to the left b y one place, that is, x/ 10 =y/5, and A is twice that of B, then x+y=30, x=20, y= 10. The ratio of A/B is 2.

How to Infiltrate the Concept of New Curriculum Standard in Junior Middle School Mathematics Teaching

Responsibilities of primary school teachers

Divisibility of primary school mathematics

Is it proved by the integral equation of Anhui college entrance examination?

Shandong province college entrance examination subjects

Mathematical problems of big trees

The simple calculation process of adding rational numbers in the first grade of mathematics should be detailed! ! !

Some views on the first question of mathematical ellipse in Tianjin college entrance examination

What is the infinite power of 1?

Ask to recommend suitable high school mathematics teaching AIDS!