There are 56 students in class 5-3, including 22 girls. What is the proportion of girls in the class and what is the proportion of girls in boys?

There are 56 students in class 5-3, including 22 girls. What is the proportion of girls in the class and what is the proportion of girls in boys?

Girls account for 11 / 28 of the class, and girls account for 11 / 17 of the boys
2 / 3 + 5 divided by 2 / 3-2 / 3
Hello, Shaoxian, Huangfu
2/3＋5÷2/3－2/3
＝2/3－2/3＋5÷2/3
＝5×3/2
＝15/2
47/6
There are 48 students in class 3 of five years, including 21 boys. What is the proportion of girls in the class? Boys are girls
Ask the first girl to divide the class
Two calculation questions (1 / 2 + 1 / 3) × 3 / 4 △ 1 / 4 225-25 × 3.2
（1/2+1/3)×3/4÷1/4
=5/6×3/4×4
=5/2
225-25×3.2
=25×(9-3.2)
=25×5.8
=145
（1/2+1/3)×3/4÷1/4
=1/6×3/4×4
=1/2
225-25×3.2
=25×(9-3.2)
=25×5.8
=145
The first 5 / 2, the second 145
（1/2+1/3)×3/4÷1/4==5/6×3/4÷1/4=5/8÷1/4=5/2=2.5
225-25×3.2=225-80=145
（1/2+1/3)×3/4÷1/4=（1/2+1/3)×（3/4÷1/4）
=1/2*3+1/3*3
=3/2+1
=5/2
225-25×3.2
=225-25*16/5
=225-80
=145
Laptop, typing is not convenient, you can understand it, that is, the formula is decomposed and then added
5. There are 45 students in class 2, including 21 boys. What's the percentage of boys in the class? What's the percentage of girls in the class? What's the percentage of girls in boys?
The second year of junior high school: (2 √ 3-1) &# 178; + (√ 3 + 2) (√ 3-2)
solution
(2√3-1)²+(√3+2)(√3-2)
=12-4√3+1+(√3)²-2²
=13-4√3+3-4
=12-4√3
There are 51 students in the class and 21 girls in the class. What is the proportion of boys to girls?
There are 51 students in the class and 21 girls. We can know that there are 30 boys, so the number of boys is 1.7 times that of girls
Calculation question 2 (x-1) ² = 8
2(x-1)²=8
(x-1)²=4
So:
X-1 = 2 or X-1 = - 2
So:
X = 3 or x = - 1
2(x-1)²=8
(x-1)²=4
x-1=±2
x=1±2
x1=3，x2=-1
If you understand, please accept. If you have any questions, please ask!
If you have any new questions, please ask for help, thank you!
2(x-1)²=8
(x-1)²=4
x-1=2
x-1=-2
X=3
x=-1
There are 19 boys and 21 girls in class 51. Boys are 19 / 21 of girls. What should we regard as a unit
Think of girls as unit 1
The number of female students is regarded as unit one. The closer the number is to the score, the more the number is unit one
The number of girls.
Calculation questions - 4 & # 178; - | - 6 | - (Π - 2011) & # - 186; - 1 △ 3 - & # - 185;
Π = Pi
Equal to - 20, regardless of PI, any number to the zeroth power is 1 (except 0)