There are 48 boys and 56 girls in the first class of the fifth grade。。。。。。

There are 48 boys and 56 girls in the first class of the fifth grade。。。。。。

1.What percentage of a boy is a girl?

48 56 is approximately equal to.

2.What percentage more girls than boys?

56-48 = 8 people 8 48 is approximately equal to.

3.I don't understand the question?

A car drove from A to B, the first hour traveled 25% of the whole journey, the second hour traveled the remaining 40%, the third hour traveled a kilometer, exactly to reach place B, how many kilometers are between A and B?

1-25%=75% 75%*40%=30% 1-30%-25%=45% km.

A: A and B are 70 kilometers apart.

This question is actually very easy to calculate, because there are five fewer girls than boys, then you can use 45-5=40 people, because girls are five fewer than boys, and the number of boys who are sentenced to be big is 25, and the number of girls is 20.

There are male x people, and the female Min Besheng has 45-x, and according to the title, there is x-(45-x) Na 晌 = 5, and the solution is x = 25. So there are 25 boys and 45-25=20 girls.

There are 25 boys and 20 girls holding Qin, and you can set up boys x people, then the female potato Jane is x-5 people, because the total number of people is 45 people, so x+x-5 45, x 25

This question should use 45-5 = 40, and then use 40 2 = 20 At this time, 20 people are the number of girls and correct, and the number of boys who have never repented is added to 20 and 5, then it is 20 + 5 = 25 people.

45-5) 2 40 2 20 (person) 45-20 25 (person) Answer: 25 boys and 20 girls.

Bonah 40 2

20 (person) 45-20 25 (person).

Answer: There are 25 boys, and 20 girls return to Yinchen.

Summary. Hello: the number of boys: 48-28 = 20, 20 48 = 5:12, that is, boys account for five-twelves of the total number of the class, usually such a number, specifically like this, I hope to help you!

There are 48 students in the first class of the fifth grade, of which 28 are girls, and what percentage of the class are boys?

Hello: the number of boys: 48-28 = 20, 20 48 = 5:12, that is, boys account for five-twelves of the total number of the class, usually such a number, specifically like this, I hope to help you!

Isn't 20 48 equal to 20 out of 48?

You need to be simple!

The final simplification is equal to 5/12

If the number of female students is x and the number of male students is (5 6) x people.

Therefore, the square jujube stroke can be set (5 6) x = 25

Available, x=30

So, there are 30 girls in total.

Method.

1. Drawing and analysis method.

2 5 of the number of girls and 2 4 of the number of boys

If the number of girls is divided equally into 5 parts, then the number of boys is the same 4.

There are 9 copies of the same for boys and girls.

First, find out how many people are in 1 portion.

72 9 8 (people).

5 copies for girls: 5 8 40 (person).

4 copies for boys: 4 8 32 (person).

A: There are 32 boys and 40 girls.

Method. 2. Column equations.

If there are x girls to dissolve, then there are (72-x) boys.

There are 40 girls, boys: 72-x 72-40 32 (people).

A: There are 40 girls and 32 boys.

Girls 2 5 Boys 1 2

Girls: Boys 1 2 2 5 5:4

There are 72 5 (5+4) 40 girls and 72 40 32 boys.

Hello, there are 32 boys and 40 girls, and the solution is as follows:

The total number of boys is equal to 2 5 2 = 4 5 for girls

That is, the number of girls: the number of boys = 5:4

The total class size was 72

So the number of girls = 72 5 9 = 40

Number of boys = 72 4 9 = 32

There are 72 students in the first class of the fifth grade, and the number of girls is 2 5, which is equal to 1 2 of the number of boys.

If there are x girls and 72-x boys.

2x/5=（72-x）/2

2x/5=36-x/2

2x/5+x/2=36

9x/10=36

x=40 (person).

72-40=32 (person).

A: There are 32 boys and 40 girls.

If there are x boys, there are 48-x girls.

1/2•x 2/5×(48-x)

9x/10=96/5

x=64 3 is approximately equal to.

The result is not an integer, please check whether the conditions given in the question are correct.

Let's first analyze this question, there are 50 or 60 students in the first class of the fifth grade, and the ratio of boys to girls is 5:6, that is, if all the students are divided into 11 parts, 5 parts are boys and 6 parts are girls.

Numbers between fifty and sixty are only 55 that are divisible by 11. , that is, there are 55 people in total.

Let's calculate how many people there are in a copy. It is necessary to divide 55 by 11 5.

Boys account for five parts, that is, 5 times 5 25, and girls account for six, that is, 6 times 5 30, that is, there are 25 boys and 30 girls in this class.

Because the number of people is an integer, the class size is divisible by 5 6 11.

So the class size is 44 students.

Boys have. 44 (5 6) 5 20 people.

Girls have. 44 20 24 people.