Primary 6 math application question answers

2 girls move 1 sheet, each person moves 1 2 sheets.

Let's say it's all boys.

51 2 102 (sheets).

102 51 51 (sheets).

Girls: 51 (2 1 2) 34 (people).

Boys: 51 34 17 (people).

Solution: Set up boy x person, girl y person, by the title:

x+y=51

2x+y/2=51

It is calculated that x=17 y=24

A: There are 17 boys and 24 girls in this class.

The second floor is right, add points to him!

Chickens and rabbits in the same cage.

51 2-51) (2-1 2)=51 girls).

51-51 1 2) (2-1 2) = boys).

It can be solved by hypothetical method and list method.

Let the boy be x and the girl be 51-x

2x + (51-x) divided by 2 51

x＝17

Girls are even, boys are odd.

That is, let the man be x people.

2x+（51-x）/2=51

x=17 Female: 51-17=34

Set Girls x Boys 51-x

51=(51-x)2+(x/2)

51=102-2x+

x = 34 boys = 51-34 = 17

So 34 females and 17 males

There are x boys and (51-x) girls.

2x+2x+

x=17 so there are 17 boys and 34 girls.

Let the boy x number and the girl have y people List the system of equations x+y=51 (y 2)+2x=51

Find x=17 y 34

To understand the question: the answer is 14 meters per second Method 1: V car * 42 68 V car * 34 + 44 Method 2: (V car V A) * 42 (V car + V B) * 34, V A * 42 68, V B * 34 44, three types of syndicate.

The answer is 14 meters per second Method 1: V car * 42 68 V car * 34 + 44 Method 2: (V car V A) * 42 (V car + V B) * 34, V A * 42 68, V B * 34 44, Lian three styles, in fact, the two methods are basically the same, but the understanding is not the same.

The time ratio of A, B, C to process a part is 6:7:8, and the three people have to process a batch of 609 parts at the same time, how many are each person?

Set up x pcs.

6x+7x+8x=609x=29

You didn't give a question, do you want a question? Or what, please make it clear.

Are you on the subject?

To do a job, two teams A and B cooperate, 10 days to complete, team A does 3 days and then team B then does 2 days, a total of 1 4 to complete all the work, how many days does it take for A to do it alone?

Is it the Soviet version or the people's version, and what is the title?

Question 1 x=120 only Question 2 (5(y-115)-1)=x

2(3(y-5)-1)=x x=1648m y=280 trees.

I'm responsible for being wrong.

1.Let a total of x enter, then (, get x = 36.

1.Column equation solved: x 270

2-column equation: y x 5 115

y－x／3＝5

Solution: x 825 (m) y 280 (tree).

1. Solution: A total of x toy rabbits were purchased.

3x=x=120

Question 2 makes me think again.

If you want to find two pairs of socks of the same color, there are 4 socks of the same color.

Consider the "worst-case scenario" that is, there are 3 socks of other colors, and there are only 4 socks of one type.

Take at least 3+3+4=10 socks.