A 5th Grade Question! This is a 5th grade question, please help to solve it!

They all use equations, I use arithmetic:

If the fractional value is known to be 5/8, the numerator and the denominator are 3 apart, which is 24:

24 divided by (8-5) = 8

then each copy = 8, and the denominator has 8 parts: 8x8 = 64

There are 5 parts of the molecule: 5x8=40

A: This score is 40 64

The numerator of 5/8, the denominator multiplied by 2 at the same time, was quickly found, 64/40

Let the denominator be 8x and the numerator be 5x

8x-5x=24

3x=24x=8 so the denominator is 64 and the numerator is 40

The score is 40 out of 64

Let the denominator be 8x and the numerator be 5x

The columnable formula is 8x-5x=24

3x=24x=8 The denominator is 64 and the numerator is 40

The score is 40 out of 64

Let the numerator x, then the denominator is 8x 5

8x/5-x=24

x=40, so the denominator is 64

The score is 40 64

The difference between the denominator and the numerator of 5/8 is equal to 3

Therefore, the denominator of the fraction is required to be equal to 8 x (24 3) = 64, the numerator of the fraction is required to be equal to 5 x(24 3) = 40, and the fraction is required to be equal to 40/64

1. Solution: If the total engineering quantity is "1", then A should do 1 15 every day, and B should do 1 20 every day, so when A and B cooperate, 1 15 + 1 20 = 7 60 should be done every day, and because the total engineering quantity is "1", so A and B should cooperate 1 divided by 7 60 equals 60 7 days 2, solution: or let the total engineering quantity be "1", then A does 1 15 every day, and 1 5 is done in three days, so the remaining engineering quantity is 1-1 5 = 4 5

C should do 1 25 per day, then the remaining 4 5 engineering quantity C should do 4 5 divided by 1 25 equals 16 days.

3. Solution: In the same way, A does 1 15 every day, B does 1 20 every day, and C does 1 25 every day, so A, B and C should do 1 15 + 1 20 + 1 25 = 47 300 every day when they cooperate, then A, B and C should cooperate 4 5 divided by 47 300 equals 240 47 days.

1 (1 15 + 1 20) = 60 7 days ......The number of days required for A and B to complete together (1-1 15 3) 1 25 = 20 days.

A does 3 days and C does it again, and it takes days.

3.: 4 5 (1 15 + 1 20 + 1 25) = 240 47 days. ......

A, B, and C work together, and it takes 4 5 days to complete this work.

A and B cooperation, the completion of the project needs: 1 (1 15 + 1 20) = 60 7 days Answer: A and B cooperation 60 7 days to complete.

2.A can complete 3 15 = 1 5 of the total amount for 3 days alone, and then there is still 1-1 5 = 4 5 of the total amount left

The rest of the remaining needs to be completed by B: 4 5 (1 20) = 16 days Answer: C needs 16 days to complete.

3.A, B, and C work together to complete 4 5:

: 4 5 (1 15 + 1 20 + 1 25) = 240 47 days. ......

1. It takes 60 7 for A and B to complete together, about 9 days;

2. It takes three days for A to do first, and then 20 days for C;

3. A, B, and C do it together, 240 47 (about 6 days) to complete the work 4 5 This question is very awkward, and all of them cannot be removed, the first question, the third question.

1 (1 15 + 1 20) = 60 7 days ......It takes several days for A and B to complete it together.

1-1 15 3) 1 25 = 20 days.

A does 3 days and C does it again, and it takes days.

3.: 4 5 (1 15 + 1 20 + 1 25) = 240 47 days. ......

A, B, and C work together, and it takes 4 5 days to complete this work.

A and B cooperate, and it takes 1 (1 15 + 1 20) = 60 7 days to complete the project.

Answer: The cooperation between A and B will be completed in 60 7 days.

2.A can complete 3 15 = 1 5 of the total amount for 3 days alone, and then there is still 1-1 5 = 4 5 of the total amount left

The rest of the rest to be completed by B is 4 5 (1 20) = 16 days.

A: C will take another 16 days to complete.

3.A, B, and C work together to complete 4 5:

: 4 5 (1 15 + 1 20 + 1 25) = 240 47 days. ......

The circumference of the square is 20cm, and the length of the side is 5cm

The bottom edge is 5cm of the leather bridge

The height of the triangle is 5cm, and the area of the triangle is (5*5) 2=

The length of the bottom edge of the triangle is 20 4 = 5, and the height is the same as the square, which is also 5, then the area = 5 * 5 2 =

If the circumference of the square is 20cm, the side length is 5cn

The area of the triangle is 5*5 2=

The circumference of the trousers is known.

Gen Hu Jinghui manuscript according to the formula.

The square side length is 4

Sky. It's so hard at 5 years old. Crying to death.

The length of the bottom edge of the triangle is 20 4 = 5, and the height is the same as the square, which is also 5, then the area = 5 * 5 2 =

Equation: 16 (3*2-4)=8 times.

Black: 4*8+16=48

White: 3*8=24 pcs.

Equation: Solution: Given x times.

3x*2＝4x+16

6x＝4x+16

2x 16x 8 whites: 8*3 24pcs.

Sunspots: 8*4+16 48 pcs.

Answer: There are 24 white seeds and 48 black seeds.

50 grams of sugar is dissolved in 400 grams of water, so the total mass of sugar water is: sugar + water: (50 + 400).

Sugar to sugar water: 50 (50+400) = 1 9

Water to sugar water: 1-1 9=8 9 (think of total mass as unit 1).

Seek sugar water first: 400 + 50 = 450 (g).

Then divide the sugar by the sugar water: 50 450 = 1 9

The result: one in nine.

Sugar to sugar water: 50 (50+400) = 1 9

Water to sugar water: 1-1 9=8 9

It's stupid enough that I can't even do this.