4th grade elementary school questions, ask for advice!!

Let the commodity ** be x yuan, then the equation 150-x=5 (70-x) is obtained to calculate x=50 yuan, so A has 100 yuan left, and B has 20 yuan left.

Question 2: Let B be x, get 4x+44=756, and get x=356

Buying the same thing means that their difference is the same. So it's a matter of difference times. set of formulas.

The difference divided by multiples minus one equals the decimal number. Twenty. Twenty times fifty equals one hundred.

It is also possible to subtract twenty from seventy to get fifty, and use one hundred and fifty to subtract fifty. A little more troublesome.

The second question, subtract what they have, and the two numbers are equal, seven hundred and fifty-six minus forty-four equals seven hundred and twelve, and divide by two. It is the number B, and adding forty-four is the number A.

Satisfied. Still have any questions. Or maybe I'm wrong.

solution, set up x yuan.

150-x=5(70-x)

150-x=350-5x

x+5x=350-150

4x=200

x=50 A leftover: 150-50=100 yuan.

B leftover: 70-50 = 20 yuan.

Solution: Set the commodity ** to be X yuan. 150-x=5(70-x) x=50150-50=100A 70-50=20B solution: Let B be x=356ok!

In the fourth grade, I did not study equations, nor did I study equation levels.

So this question can be hypothetical.

Suppose A and B each buy one copy, the first book is less yuan, and the second book is less yuan. It means that two people buy two books and lose yuan. If two people's money is added up to buy a book, it is more than one yuan.

The meaning here is that if you use less money to buy a book, you can buy a multi-book.

So the final answer is meta).

Buy 2 copies less.

Buy a copy more.

So think of it this way, I'll buy one first, and borrow the rest, enough to buy a second one.

The second ** is.

Year 4 doesn't know if you can solve equations, but if you can, you can use their solutions.

It's actually quite simple.

Suppose you give A Yuan B Yuan, then A and B can buy 2 books together, and the original can buy 1 book + Yuan, so.

The price of 1 is 1 yuan.

Let the book be x dollars, A has B: The total money of A and B = the total amount of money of A and B is equal to x+

So: x+ so: x=

Set this book to be $ x.

Then the money on A is B.

According to the title, the solution is x=

x+ just solve this formula.

Kilometers 175 70 hours

2.Each basket of apples weighs x kilograms.

x－12﹚÷﹙x－18﹚＝

x＝30

1 21 km h.

175 70 = hours.

2 There are many times as many apples left in the first basket as there are apples left in the second basket.

18-12=6 There are 6 kg more apples left in the first basket than in the second basket.

6 1 times is equivalent to 12 kg x 12 = 18 times is 18 kg 18 + 12 = 30 (kg) plus the 12 kg sold is the weight of the first basket Answer: It turns out that each basket of apples weighs 30 kg.

1) 175 (21 hours.)

2) (18-12) (kg This is what is left of the second basket.

12+18 30 kg This is the original per basket.

1.A car travels 21 kilometers in an hour, how many hours does it take to travel 175 kilometers at this speed 175 (21

A: It takes hours to travel 175 kilometers at this speed.

2.Two baskets of apples weigh the same, with the first basket selling 12 kilograms and the second basket selling 18 kilograms. The apples left in the first basket are exactly double the apples left in the second basket. How many kilograms did each basket of apples weigh?

30 (kg).

A: Originally, each basket of apples weighed 30 kilograms.

1.If you go 21 kilometers in an hour, you go 70 kilometers in 1 hour, and you travel 175 kilometers at this speed in 21 and at this speed, you will take 175 70 = hours.

21 kmh).

175 70 = hours.

2.The second basket sells 18 kilograms, the first basket sells 12 kilograms, the second basket sells 6 more apples than the first, and the apples left in the first basket are exactly double the apples left in the second basket. It means that the second basket sells 6 more apples than the first basket, which means that the remaining apples in the first basket are exactly 0 of the remaining apples in the second basket

5 times, that 1 times is to use 6 kilograms, the remaining apples in the first basket are exactly 12 * kg more than the remaining apples in the second basket, then the original weight of each basket of apples is 12 + 18 = 30 kilograms.

18-12 = 6 (kg).

6 (kg).

12*kg).

12 + 18 = 30 (kg).

I'm not very good at expressing it.,Maybe it's a little out of place.,I don't know if you can understand it.,Hehe, if you use equations to solve it, it's very convenient.。

Let's assume that each basket of apples weighs x kilograms.

x-12）/(x-18)=

Solution x=30

1. 175/（ 21/

2.Untie; Let's assume that each basket of apples weighs x kilograms.

x--12) / (x--18)=x=30

kilometers per hour) 175 70 = hours).

2.Let's assume that each basket of apples weighs x kilograms.

x-18)*

x=30A: Each basket of apples weighs 30 kilograms.

1. v=s t i.e.: speed = distance time.

v=21 km h).

t=s v=175 70=hours).

2. If each basket of apples weighs x kilograms, then:

x-12= * is the meaning of multiplication.

x=30, so it turns out that there are 30 kg of apples in each basket.

1.The speed per hour is 21 km/h) 175 km/h 175 70=hr) 2.Let each basket weigh x kilograms.

x-18)*

Solution x=30

A: Each basket of apples weighs 30 kilograms.

1.21 divided by 175 to find the time it takes to get out 1 km 175 by 70 is 2

Buy 2 copies. Few.

Buy a copy. Many.

Then you can think like this, I will buy one first, and then borrow the rest, Shixun is enough to buy a second one.

The second ** is.

Grade 4 I don't know if I can list equations, but if I can list equations, you can use their solutions.

Set up a dry inspection of this book x yuan, and a promotion and defeat brigade have.

B: A and B's total stool money =

The total amount of money for A and B is equal to.

x+ so: x+

So: x=

1 cup A and 5 cup B are required.

480 4 = 120 (yuan).

Compared with the first case, each of the A cups.

330-120) (8-1) = 30 (yuan) for each cup of B.

120-30) 5=18 (yuan).

18*5=90 (yuan) 15*5=75 (yuan).

A: I bought 5 copies of each of the two books.