6th grade math problems, ask for solutions! 6th grade math problems, solved!

1) One spell is less than two faces, and the total number of faces is missing: (3 1) 2 4 (pieces) The area of each face of the cube is: 350 (3 6 4) 25 (square centimeters) The surface area of each cube is:

25 6 150 (square centimeters) 2) Consider the circumference as 1

The length of the first rectangle is the circumference.

Width is the circumference:

The area is: 2 7 * 3 14 3 49

The length of the second rectangle is the circumference:

Width is the circumference:

The area ratio is: the first area and the second area ratio is: 3 49: (15 242) 242: 245

If you mix three kinds of sugar together to make assorted sugar, then the cost of this assorted sugar per kilogram is yuan.

4) You can buy 25 soccer balls.

Solution: If the unit price of football is x, then the unit price of basketball is x+3, then you can buy 300 x footballs and 300 (x+3) basketballs, because you can buy 5 more soccer balls than basketballs, so.

Soccer = Basketball +5

That is, 300 x = 300 (x+3)+5

The solution is x=12 or -15 (rounded).

So x=12

Number of footballs = 300 12 = 25

27 km. 6) Answer: (1) The donation of workshop A is two-thirds of the donation of the other two workshops

The number of donations from A is 2 (2+3) = 2 5 of the total number of the three workshops; (The number of donations from workshop A is regarded as 2 shares, and the other two workshops are a total of 3 shares, and the total number is 5 shares) (2) In the same way, the number of donations from workshop B is 3 (5 + 3) = 3 8 (3) then the donations of workshop C account for 1-2 5-3 8 = 9 40 (4) The total number of the three workshops is: 12 (3 8-9 40) = 80 yuan.

3) Set the time of the exercise to x minutes, then.

op=3x，om=x+3

So pm=om-op=x+3-3x=3-2x, pn=3x+1-4x=1-x

From the meaning of the title, 3-2x=1-xx=2

1 is 450 square centimeters, 2 is 242 245, 3 is 11 6 yuan. 4 titles 25 pcs.

1.150 pcs.

2.Let's say that the distance is x and mom is y

2x-20=2y-40

2x-2y= -40+20

2x-2y= -20

x-y= -20

Obviously ran 20 meters less than my mother.

3. 4*60*10/50*30+2=184.Let bag B be x

20+1/4x=(1-1/4)x

x=405.Let 2 yuan be x sheets, and 5 yuan be y sheets, x + y=27

2x+5y=99

Solve the equation to get.

x=12y=15

6. 240/(4*3+8)*3=367. 40/2*2+90/3*2+96/4*2=1488.Let the speed of the passenger car be x

x(1-1/4)*3=30x=40

9.Let the first bookcase be x

x*(8/13-1/2)=15

x=13010.Let the pull-out be x minutes, which is called y minutes.

x+y=74

Solve the equation: x=50 y=24

1. Let the speed of A and B be x kilometers per hour, then.

12-9）x= x=

12-8) km.

A: A and B are kilometers apart.

2. Set up apprentices to process x parts per hour.

8x=5（x+12）

x=208 20=160 (pcs).

A: The master and the land each process 160 parts.

Question 2: Because the total number of parts processed by the two people is the same, the total number of parts processed by each can be set to x, the master completes 1 5 per hour, and the apprentice completes 1 8 per hour!

1/5-1/8）*x=12

x=160 so the master completes 32 per hour and the apprentice completes 20 per hour.

But there is a problem with the landlord's question!

1. Set the speed x km hours and the distance y km (provided that B is the end point) 4x + 3x = y

y - 4x =

Answer: x=; y=

2. Set up x hours for the master and y hours for the apprentice.

x - y = 12

5x = 8y

Answer: x = 32;y=20

In the first question, does the end point refer to A or B?

The second solution: If the apprentice processes x per hour, the master will be x+12.

5*(x+12)=8*x

So x=20, x+12=32

1.（1/5-1/8）*x=12

x=x=20 master: 20+12=32

Hope it helps.