What about 6th grade math problems! Sixth grade math questions to say why you did it

1. Set the product ** to x

x=4800

2. Error a 5=b 6 a:b=5:6

3. s= multiplied by the square of the radius The radius is 2 times the area is 4 times.

5. Set the full length x

1-2 5)x-2 5 x=24 x=1206, table**x chair**y can buy z sets.

160x=480y x=3y

3y+y）z=480y

z=120

2.Wrong.

15*(1+35%)=square meter.

6.120 sets.

With a dollar, you can buy x sets of tables and chairs.

a/160+a/480)*x=a

x=120

1.Set the original price to $x 78%x = x - 1056

2 False The answer should be 5 : 6

3 The ratio of the minor circle to the large circle is 4 : 1

First question: 1056 (1-78%)

Question 2: Correct.

Question 3: r=2d=4r, so the area ratio is 16:1 according to s= r Question 4: 1 （15-12）/12 2.15 (1+35%) Question 5: 24 (3 5-2 5).

Question 6: 160 table fee = 480 chair fee So, table fee = 3 chair fee, then the total price is 480 chair fee, single set** is table fee + chair fee = 4 chair fee, number of tables and chairs = 480 chair fee (4 chair fee) = 120

1: Solution: Let the original price be x to get:

x=4800 (yuan).

A: The original price is 4800 yuan.

2:, one-fifth a = one-sixth b, then a:b=6:5 ( is wrong · ) the correct one should be: one-fifth a = one-sixth b, then a:b = 5:63: r = 4 r

4:06 housing area increased by 25% compared to 02 · 09 per capita housing area is square meters.

5: Solution: Set this road x, get:

3\5x-24=2\5x

3\5x-2\5x=24

1\5x=24

x=120(km)

A: The road is 120km

6: Solution: 1 (1 160 1 480) = 120 (sets).

2. Error is 5:6 a:5=b:6 then a:b=5:6:1 The radius of the great circle is twice the radius of the small circle, and the ratio of the area is equal to the square of the ratio of the radius.

and square meters. km 24/(3/5-2/5)

160x=480y, then x=3y, 480y, 4y=120

Question 1: 4800 Question 2: False Question 3: 4:1 Question 4: Question 5: 72km Question 6: 120

I list the equations by myself, and I don't know how to ask my teacher.

I'm also in the sixth grade, so these questions are really too easy, so study hard.

1.78% off = 78% 1056 (1-78%)2Right. You can simplify their comparisons.

6.What conditions did you miss in this question?,It shouldn't be the only these.,You see if there's an illustration or something you didn't see.,This kind of question generally has a unit price.。

I'll come: If the landlord can't think of this question, then it must be that the positive proportion and the inverse proportion are not clear.

Definition of Positive Proportion and Inverse Proportionality:

Proportional: two related quantities, one quantity increases, because the quotient must be kept constant, so the other quantity has to increase with it, these two quantities are called proportional quantities, and their relationship is called proportional relationship

For example, if a b = c, if a x is to ensure that the quotient is constant, then b should also be multiplied by xIn this equation, a and b are proportional.

Inverse proportionality: two related quantities, one quantity increases, because to keep the quotient constant, the other quantity must decrease, these two quantities are called inversely proportional quantities, and their relationship is called inverse proportional relationship

For example, d b = e, if d x, to ensure that the product is constant, b should be divided by xIn this equation, a and b are inversely proportional.

Summary: In the same equation, the dividend is proportional to the divisor, and the two multipliers are inversely proportional.

Now let's get to the problem:

After calculation, we can come up with three formulas:

The number of square bricks The area of the square bricks = the area of the kitchen.

Then the number of bricks and the area of the bricks are the "two multipliers" in the "summary" above, so they are inversely proportional.

If you think it's messy, let's figure it out one by one! The main thing is to work hard to learn! And don't be upset! For example, if you don't understand any knowledge points, you can ask questions

Hehe, I think I should understand what you mean when you say "you can't do the percentage problem". Actually, there's a little tip:

A few percent more (heavier) than b, then (a-b) b

Percentage. A few percent less (lighter) than b, then (b-a) b

Percentage. Pay attention to 1 and 2 above, the tip is:

Percentage is a division operation, the dividend is the 'difference' between the two, the divisor is the number after the word 'ratio', and the quotient 100% is the percentage".

The mass ratio is 3:2, and two baskets of apples are mixed together to form a 100 kg mixture. 60 kg of large apples and 40 kg of small apples.

If the unit price of a big apple is x yuan, then the unit price of a small apple is yuan.

60x+40 multiplied by the total price).

Get x = 110 23

That is, the Big Apple** is 110 23 and the Small Apple** is 88 23

100 divided by (3+2) = 20 Large: 20 times 3 = 60 kg Small: 20 times 2 = 40 kg What does "unit" mean?

If the unit price of a big apple is x yuan, then the unit price of a small apple is yuan.

Title suggests: 3x+2*

Solution: x=110 23

Class 61 and Class 62 have 45 and 44 students respectively.

41 people. There were a total of 41 girls in the two classes.

The number of students in class 61 is a multiple of 15 15 30 45 60 75 possible 8 copies 7 copies = 15 copies The number of students in class 61 should be divided into 15 parts.

The number of students in class 62 is a multiple of 11 11 22 33 44 55 66 77 88 possible (6 copies 5 copies = 1 part 6 2 number of people can be divided into 11 parts).

Now there are only 45 44 = 89 and 45 and 44 respectively in Class 61 and Class 62.

45 Ang 8:7 Female 21 44 Ann 6:5 Female 20 21 20 = 41 Female.

The number of people in class 61 is a multiple of 15, let it be 15x, and the number of people in class 62 is a multiple of 11, let it be 11y, so 15x+11y=89.

From common sense, we know that x and y must be positive integers, so we can reason the following:

When x is 1, y is a decimal, excluded;

When x is 2, y is a decimal and excluded;

When x is 3 and y is 4, it is a positive integer and holds;

,...... when x is 4

When I tried the roots further, I found that it was impossible. So x is 3 and y is 4, so there are 21 girls in class 61, 20 girls in class 62, and a total of 41 girls in class 2.

1.15 people in the first class and x people in the second class.

2. A class of 30 people.

3 45 people per class.

4 60 people in a class.

5 75 people in a class.

To name a few. The second class does not match the abandonment.

It's good in the end.

There are 45 people in a class.

There are 44 people in the second class.

Then multiply the number of students in each class by a fraction of the number of girls in each class.

First formed:

The ratio of male to female students in Class 61 = 8:7 = 24:21

The ratio of male to female students in Class 62 = 6:5 = 24:20

Class 61 24 + 21 = 45

Class 62 24 + 20 = 44

It adds up to 45 + 44 = 89

41 1 = 41 people.

A: There are 41 girls in the two classes.

Since the total number of people is 89 and the single digit is 9, 15*3=45 11*4=44

So the number of people in the first class is 45, and the number of people in the second class is 44

Class 61 and Class 62 have 45 and 44 students respectively.

Suppose that later the two piles of coal weigh x each

Then the first pile starts to weigh 5x, and the second pile starts to weigh 4x

then there is 4x+5x=

x=so the first pile starts to weigh heavily.

5* tons. Also, your score in the question is written backwards.

The second pile is to transport away 3 4 bars ......This is the solution:

Let the first pile be original x tons, then the second pile will be original (tons.

After transporting, the first pile was left with 1 5, and the second pile was left with 1 4, and now the two piles are equal.

That is, 1 5*x=1 4*(

The solution is the weight of the original coal in the first pile.

Divided into six sections, then each section 300 6 = 50m E, A two points counterclockwise difference of 4 sections 200m per minute, Xiao Wang is 40m faster than Xiao Li in the same road section, the difference between 2 people is less than 50m, calculated according to 50m and then tested, get (200-50) 40 = points At this time, Xiao Wang ran 180 * at the midpoint of CD Xiao Li is 525m at the midpoint of BC Obviously, 2 people are not in the same road section At this time, Xiao Wang and Xiao Li are 25m away from the next benchmark, but Xiao Wang is fast That is to say, when Xiao Wang runs to point C, Xiao Li will inevitably not be able to run point B, so the time sought earlier should be added to the time spent on this distance: 25 180 = 5 36 points, a total of 15 4 + 5 36 = 140 36 points, which is about points.

This question seems to be easy, as follows:

Divided into six sections, then each section 300 6 = 50 meters. The difference between E and A is 200 meters by 4 steps counterclockwise. Xiao Wang is 40 meters faster than Xiao Li per minute, and it takes 200 40 = 5 minutes to catch up with him. So it's 5 minutes on the same section.