How to write the composition of exercise 4 in Volume 2 of grade 6 of Jiangsu Education Press

How to write the composition of exercise 4 in Volume 2 of grade 6 of Jiangsu Education Press

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Grade 6 mathematics composition 400 words (Jiangsu Education Press) composition of grade 6 Chinese exercise 4 (Jiangsu Education Press)

The third exercise of unit 1 of primary school Chinese Grade 6 Volume 1

I am a little tadpole big head, round body, wearing a black robe, a thin and long tail. This is me, a little tadpole, a little tadpole longing for freedom. I used to live in a clear river, swimming in the river with my friends in groups, and I was very happy. Ah

According to the condition, the unknown number is set and the equation is listed
The sum of one-third of a number and half of the number is 25

Let this number be X
3 x + 2 x = 25
(1 / 3 + 1 / 2) x = 25
5 / 6 x = 25
X = 25 △ 5 / 6
x=30

What are the factors related to the friction force

The amount of friction depends on the positive pressure and the material of the object itself

Given that 5 is the solution of the equation 3x-2a = 7 about X, then the value of a is () method

Let 5 be the solution of the equation 3x-2a = 7 about X
So 3 * 5-2a = 7
So a = 4

There are two cars driving on the highway. Car 1 travels 60 kilometers per hour and car 2 travels 80 kilometers per hour. Car 1 is two hours ahead of car 2. What's the speed
Km, car 2 overtakes car 1? No, I don't understand~

If you walk for 2 hours first, it's equivalent to 60x2 = 120km from the starting point. The speed difference between the two cars is 80-60 = 20km / h. if car 2 catches up with car 1, it's equivalent to car 1 doesn't move. Car 2 walks for 120km at 20km / h. It takes 120 △ 20 = 6h. In 6 hours, the distance that car 2 walks is

If a set a = {1,2} and B satisfies AUB = {1,2}, then B has () sets

B can be:
one
two
one point two
empty set
Four in all

3x / (X & sup2; - 2x), (2x + 1) / (4-x & sup2;), 3 / (2x & sup2; + 4x) general division~

First, simplify
3x/(x²-2x)=3/x-2
(2x+1)/(4-x²)=2x+1/(2+x)(2-x)
3/(2x²+4x)=3/2x(x+2)
The score is divided again
Denominator: 2x (x + 2) (X-2)
The recanalization molecules are as follows:
6x（x+2),2x(2x+1),3(x-2)

If the weight of an orange is 1 / 2 that of an apple or a banana,
The weight of the apple is 1 / 3 of the total weight of the orange, banana 200 kg, ask a total of how many fruits, equations, do not calculate!

If the weight of an apple is XKG, the weight of an orange is 3x,
3X=(x+200)/2
X=40
40 kg apples and 120 kg oranges
Total fruit = 40 + 120 + 200 = 360 kg