To be a question about fractions, a question about fractions

1221/(9+8)=221/17=13

Therefore, the original fraction is: (13*8) (13*9)=104 1172(1997+x) (1999+x)=1999 20001999*1999+1999x=2000*1997+2000x

A: The number added is 2001

2 3*(111*111-11*1111) (111*1111)=2 3*(12321-12221) 123321=-(2 3)*(100 123321)<0So, 222/333< 22/333 (less than) 45 9=805 (9*7*23).

So 12 23< 5 9< 4 75 because.

The circumference of a rectangle and a square is 36 centimeters.

Therefore, the side length of the square is 36 4 = 9 cm, the area is 9 * 9 = 81 square centimeters, and because the width of the rectangle is 1/2 of the length, let the rectangle be a centimeter wide and 2a cm long, then 2 * (a + 2 a) = 6a = 36 The solution is a = 6 cm, so the area of the rectangle is 6 * 6 * 2 = 72 cm.

So the area of the rectangle is 72 81 = 8 9 (nine-eighths) of the area of the rectangle is less than the area of the square (81-72) 81 = 1 9 (one-ninth).

64c=5d c=5d/4=5/4d

So, c is five-fourths of d.

Big brother, I'm the first to finish writing, I'm so tired of writing, give me some points.

6.Neighbors.

3.Equally large.

2 thirds.

I'm only going to do that much.

The sum of 8 plus 9 equals 13, and the numerator and denominator are multiplied by 13 to get 104/117

There are two classes in the sixth grade of a school, and the number of students in class A is 5 7 of class B, and if 3 people are transferred from class B to class A, the number of students in class A is 4 5 of class B. How many people were there in Class A and Class B.

Percentages are expressed (one number is a percentage of another), and percentages are also called percentages or percentages.

A fraction can represent not only a number but also a relationship between the two, while a percentage can only represent a relationship (between the two), so the percentage cannot be followed by a unit

The answer is a.

For example: 1 divided by the true fraction (1/12), the quotient is 12

So the answer is A

Pick me!

Minutes = 3 4 hours. (The greatest common factor for the fraction and 24 is 3.)

3. Arrange 7 and 7 9 in order from largest to smallest: 7 9> 3 4> 5 7

3+1 4+ 1 5= 1 and 1 The reciprocal of 2 is 2 5.

Tons 150 kg = 2 and 3 20 tons. 7. It is known that 10 yuan can buy 12 apples, and the existing yuan can buy 27 such apples

8. There are 52 students in a class, including 30 girls, and the ratio of girls to boys in this class is 15:11.

9. If the sum of three consecutive natural numbers is 21, then the least common multiple of these three numbers is 336.

It's your holiday homework, right? Do it yourself.

Hello three-quarters can be understood as putting the unit"1"Divided into 4 parts equally, the number of such 3 parts can also be understood as put"3"It is divided into 4 equal portions and represents the number of such servings. That's right.

That's what fractions actually mean.

I'm glad to answer your questions and wish you progress in your studies! If you don't understand, you can ask!

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Hello: Correct.

Good luck with your studies!

This understanding is correct. There's a topic that's it.

Divide the 3 pieces of bread into 4 equal parts, no matter how you divide them, each part is 1 4 of the 3 pieces of bread, that is, 3 1 4 pieces, and put together 3 1 4 pieces of 1 piece of bread, that is, 3 4 pieces. Therefore, 3 4 = 3 4 (block).

It can be seen that it can be understood not only as dividing one piece of bread (unit "1") into four equal parts, which means the number of such three parts, but also as dividing the whole of three pieces of bread (unit "1") into four parts, indicating the number of such parts.

Correct, but generally understood as dividing 1 into 4 parts and taking 3 parts.

After giving a cow, a total of 17 + 1 = 18 heads.

Boss: 18*1 2=9

Second: 18*1 3=6

The third child: 18*1 9=2

One more cow, return it.

Borrow a number, construct 18, the boss is divided into one-half, the old two-thirds are one-third, and the old one-third is one-ninth, respectively, 9, 6, 2 The remaining one is returned, just after the division.

Add a cow and divide it again.

Remove the cow again.

Or do it with proportions.

Second (3+6+9) 3=6

The third (3+6+9) 9=2

Old 1 (3+6+9) 2=9