Fractional math problems, everyone will do it for me

2.The title is wrong, it should be 3 8, 1312*5 8-1312*3 8=328

3。Let the fourth grade x,9 8x+x+9 8x-14=480 get x=152

4。Let x,2 5x+2 5x+600+3600=11 10x get x=14000

The solution is x as a score, and the question is wrong.

Solution x=2160

1 (Divide by.)

2 1312 multiplied by 2/8 = 328 I think you made 3/8 out of 8 into 8/3.

3. If the number of fifth-graders is x, then x is multiplied by 8/9 + x+x-14=480 to obtain x as 171 and the number of sixth-graders as 157

5 Wrong Question You made a mistake.

If you want to do it, I can tell you about it, kid.

I don't want to add to question 3, you can ask your classmates or teachers.

My answer is absolutely correct.

is 625/1000 50 is 5001/1000 - 625/1000 = 1252/1000The title is wrong, it should be 8 3

3.Let the fourth grade x,9 8x+x+9 8x-14=480 get x=152

4.Let x,2 5x+2 5x+600+3600=11 10x get x=14000

Solution x=2160

4.The last sentence of the fourth question is one-tenth of it. Answer: 14000

unknowns ? The score is not the right expression

Done == Let's take a look at the fourth question, right?

Is the landlord a primary school student?,It's so simple.,I don't even want to.。

It's so easy to ask, I really don't know how you learned it!!

Don't do it so easily, you have to study hard when you're a child! No opportunism!!

…Are you in 6th grade? It's time to raise your IQ.

The cost price paid at the time of purchase is 16024

**Price: 1000*16=16000

Processing fee: 16,000*

The profit when selling is 20000-50=19950

16+ yuan.

**Price: 1000*20=20000

Fees and transaction taxes 20,000*(

So the earnings: 19950-16024=3926 is that right?

540 divided by 120% = 450

540 divided by (1-20%) = 675

Lost $45.

Cost = current price at 1 (cost) + earn 100% confidant.

The current price is divided by 1 - boasting.

Hundred. Confidant.

The key to this question is to calculate the cost.

The equation goes like this.

Set the purchase price of A xx+20%x=540

120%x=540x=450

A product earned 90

Let the purchase price of B be xy-20%x=540

80%x=540x=675

Commodity B lost 135

Answer: Lost 45

Solution: If the cost of the commodity is x yuan, then there is.

x*(1+solve x=1500 (yuan)

A: The cost of the goods is 1500 yuan.

If the cost is x yuan, the selling price is (1+20%) x 88%=

x=1500

With equations! Use it often in the future!

Solution: If the cost of the commodity is x yuan, then there is.

x*(1+solve x=1500 (yuan)

A: The cost of the goods is 1500 yuan.

If the cost is X yuan, the price is X (1+20%), and the selling price is X (1+20%) 88%.

So there is x(1+20%)88%-x=84

x=150

1:2 5 divided by 2 3 gives 3 5 meters an hour 2:2 3 divided by 2 5 gives 5 3 hours.

After the 5th change, the length of the gold hoop bar is meters. m = 243 m The order of change of the golden hoop rod 1 cm 3 cm 9 cm 27 cm 27 cm ......243 cm Aberdo If you look closely at the above series, the length of the golden hoop rod expands by 3 times every time it changes. Both 1 3 3 3 3 3 = 243 cm So after the 5th change, the length of the gold hoop rod is meters.

According to the title, it can be seen that the law of its change is 3 to the nth power, and 243 is to the 5th power of 3, so it needs to be changed 5 times.