Grade 6 math problems 3 questions ? Grade 6 Math Problem 3 .

I think you may not have learned equations yet, so you do it with arithmetic.

First, it is known that B has one more copy (4-3) than A, that is, 5 14 more, so one copy is.

5 14 divided by (4-3)=5 14

B has four parts, so B is.

Second, adding 60% to a number plus 5 gives 100% in itself, so 5 is equivalent to 1-60%5 divided by (1-60%)=

Three, for 65% of this number, so.

The first one on the first floor is 5 14 instead of 14 5

Solution: (1) Let the number of A be 3x and the number of B be 4x, then.

4x-3x=14/5

x= So, the number B is.

2) Let this number be y, then:

60%y+5=y

y=3) Let this number be z, then:

65%z+z=150/13

1: The ratio of the two numbers of A and B is 3:4, and the number B minus the number A gets 5/14, find the number of B?

Let the number A be 3x and the number B be 4x.

4x-3x=5/14

x=5/14

3x=15/14，4x=20/14

Two: 60 plus 5 of a number equals itself, find this number?

Let this number be x.

x×60%+5=x

x=three: the sum of 65 of a number is exactly 20, find this number?

Let this number be x.

x×65%+

x=150/13

(1) 2/5 of a 1m long rope: 1*2 5=2 5 m is equal to 2 5 m --- two sections are the same length.

2) 2/5 of a rope 2m long: 2*2 5=4 5 m More than 2 5 m --- the former long.

2/5 of a rope 2m long).

3) The unit is different, the value is different, the larger the unit, the larger the value, the smaller the unit, the smaller the value.

Hehe1, answer: Measure 2/5 of it on a 1m long rope, which is (1 2 5 = meters, that is, 2/5 meters; Both segments are the same length;

2. Answer: Measure 2/5 of a 2m long rope as (2 2 5 = meters, longer than 2/5 meters;

3. Answer: When the length of the rope is 1m, 2/5 of it is 2/5 of 2 meters;

1. The same is 40 cm, of course, the same length 1m=100cm, 100cm, x 2, 5=40cm.

2. This is also 80 cm, of course, it is also the same length: 2m=200 cm x 2 5=80 cm.

3. For these two questions, can you deeply understand that it is obviously coaxing children!!

Let's ask: What about a pound of cotton? Or does it weigh a pound? Change the soup without changing the medicine.

The aspect ratio is 7:3, so the length is 7x and the width is 3x

It becomes a square ridge, so the liquid laughs and makes a fuss, containing 7x-12=3x+16, and the x=7 is sought

So the original rectangle, length 49, width 21 area 1029

1.A cylindrical billet part with a base diameter of 6 cm and a height of 5 cm. If you make it into a conical part with a height of 10 cm, what is the square centimeter of the bottom area of the part? (is wrong).

Cm. 2.There are 6 cylindrical bamboos with a bottom diameter and a height of 5m in the hall, which are now to be painted, with paint per square meter, how many kilograms of paint are used to paint these columns?

Kilogram. 3.There are three quantities of length, width and area of a rectangle, and if the length is constant, the width and area are proportional to each other. Under what conditions can these three quantities form a proportional relationship, and what kind of proportional relationship is it?

The width is certain, and the area is proportional to the length.

The area is fixed, and the length and width are inversely proportional.

1。Volume v=9x5=45. So the base area is 45 x3 10=

2。To paint, you only need to paint the sides. The side area is so common 3

3。The area is fixed, and the length and width are inversely proportional. The width is fixed, and the length is proportional to the area.

squared *10=

Note: The volume formula for a conical shape = base area multiplied by height divided by 3

3.In the case of a certain area, the length is inversely proportional to the width.

Divide by 2 = 3 (cm) 3 times 3 times 5 = times 3 = divided by 10 =

2. Multiply 5 = multiply 6 = multiply.

3. In the case of a certain width, the length is proportional to the area; In the case of a certain area, the length and width are inversely proportional.

Question 1 x:y=(1):(20).

Question 2: Inverse proportionality. Not inversely proportional. Inverse ratio. Inverse ratio.

I can't understand the third question...

1).x:y=4:5

2).Yes, no, yes, no.

3).?I don't understand the title.