Are there any representative 50 exercises for 6th grade math problems?

1.Commonly used charts are ( ) Charts, ( Charts, ( Charts.

2.If you want to represent the relationship between the quantities of each part, you can use ( ) chart to represent it.

3.The sector chart is represented by ( ) for the total and ( ) for the percentage of the total for each part.

4.To reflect the relationship between Xiao Ming's family's various expenditures in the last month and his family's total expenditure, you can choose ( ) statistical chart.

Proportional exercises.

1. Think about it and fill it in. 1. At 4:7=48:

84, 4 and 84 are proportional ( ) 7 and 48 are proportional ( ) 2 4 : 5 = 24 (= ( 15 3, the diameter of the great circle is 4 cm, the diameter of the minor circle is 2 cm, the simplest integer ratio of the circumference of the great circle and the small circle is ( ) the simplest integer ratio of the area is ( ) the divisor of 4 12 has ( ) Select four of the divisors and make them into a ratio is ( ) 5, in a ratio, two outer terms are reciprocal to each other, one of the inner terms is 16 , then the other inner term is ( ) two, Please be the little referee. (9 points) 1. The formula composed of two ratios is called proportion.

2. Enlarge the former term of a ratio by 2 times, and reduce the latter term by 2 times, and the ratio of this ratio remains unchanged. (3. If 8a = 9b, then b:a = 8:.)

9 。4. It is composed of four numbers, which can be composed of proportions. (5. In the ratio, the product of two outer terms divided by the product quotient of two internal terms is 1.)

3. The serial number of the correct answer is filled in parentheses. 1.The two ratios of the following group ( cannot form a proportion.

a, 8:7 and 14:16 b, and 3:

1 c, 19: 110 and 10:9 2, on the clock face, the ratio of the rotation speed of the minute hand to the hour hand is ( ) 60:

1 360:1 12:1 3, because 3a=4b, so ( )a b=3 4 a 4=3 b b 3=a 4 3 a=4 b Fourth, write the following solution ratio of the solution basis.

85 x=20 4 20x=340 20x=85 4 according to x=340 20 according to 5. Solution ratio x:14=6:28 x= 15 x 8= 1, the ratio of the number of boys and girls in the choir group is 5 7, and there are 25 girls among them.

1. The speed ratio of a passenger car and a car is 1:2, if the speed of the car is 120 kilometers, then how many kilometers is the speed of the passenger car? 2. The actual height of Building 1 of the Garden Community is 45 meters, and the ratio of its height to the height of the model is 500:

1。What is the height of the model in centimeters?

Set 40 meters per day to speed up the work after x days.

40（7-x）+50x=300

10x+280=300

10x=20

x=2 and therefore speeds up from the third day.

2) Set up x days of rain.

10x+16（12-x）=14×12

192-6x=168

x=4 sunny days have 12-4=8 (days).

Note: For semicolon, for division, 2 1 for half, 5+4 1=5 4 1 for 5 and 4 1 (with fractions).

Set bag A of rice for x kilograms, bag B of rice for y kilograms, that is, y-x=18(x-6) (y+6)=4 7, solved by the system of equations:

x = 46 and y = 64, that is, the original 46 kg of rice in the first bag.

There is a batch of coal in the canteen, which burns x tons every day, and after burning for three days, there are still tons left, and this batch of coal has (3x+9) tons.

Xiao Ming increases his speed.

Later, I did: (1-1 4)*2 3=1 2

In the same time, if the original speed is followed, Xiao Ming can do: (1 2) (1+20%)=5 12

During this time, Xiaohong did the first.

(5 12) (1 4) = 5 3 times the genus, so Xiaohong did it for the first time (1-1 3) (1+5 3)=1 4, so Xiaohong's questions have a total of 45 (1-1 4)=60 questions, and the two people have a total of 60*2=120 questions.

Zu Chongzhi (

The length of an arc.

It's the perimeter. The area enclosed by the circumference is the area of the circle.

According to the equation of the question: if the apprentice processes x per hour, the master processes x per hour. A: The master processed 420 pieces per hour. The apprentice processed 350 pieces per hour.

The first question, copy 12, first find the least common multiple of 4 and 6, which is 12, and then bring it to the question, there is no special explanation.

In the second question, let the distance between the two places be x kilometers, according to the equation of the question, x, solve the equation x = 450, you can know that the distance between the two places is 450 kilometers, and it is required to arrive in hours

Since a-3 >=0 and b-5 >=0, the equation a-3 + b-5 =0 can only be true if a-3 =0 and b-5 =0.

So a=3, b=5, then a+b=8, if you don't understand, go here to find me, and I'll give you a specific answer.

C number x, counted x, A number 4x

x+x+4x=120

6x=120

x = 20 A number is 80

The greatest common divisor of 18 and 30 is 6, so the answer is that the longest of each paragraph is 6dmIt can be truncated into 3+5=8 segments.

A circle of the fish pond is composed of a half circle and a diameter, the length of the half circle is 2* meters, and then the diameter is 30, so it is 30+ meters to walk around.

Zu Chongzhizi.

The length of the curve that encloses the circle is called the circumference of the circle, and the circumference of the circle is equal to the pi multiplied by the diameter, and it is also equal to 2 times the pi multiplied by the radius.

The area of the circle refers to the size of the plane occupied by the circle and is called the area of the circle.

Formula: Square of the radius

The master processes the apprentice twice more than the apprentice.

That's 70.

So the apprentice processed 70 of them. The master processed 350* pieces.

A does 1 6 in 1 hour, and B does 1 4 in 1 hour

After A does the work alone for 2 hours, he does the work (1 6) * 2 = 1 3, and the remaining work is 2 3 A and B work together, (2 3) (1 6 + 1 4) = (2 3) (5 12) =

And another hour.

That's right.

After a little in-plane.

can draw countless straight lines (anti: bai can draw a little bit through countless straight lines in the plane) zhi;

The opposite is true: any triangle with equal sides of the DAO is a congruent triangle (positive: any one of the congruent triangles has equal sides).

There are many more such examples, so you have to use your own brain!

In the first question, the number of bai is set as.

x then the numbers of A and C are 4x and x respectively

4x+x+x=120

Find x=20

Therefore, the number of zhi and the number of dao in 4x=4*20=80, the second problem is equivalent to finding 18 and back to 30

The maximum common divisor of answers.

And 18 and 30

The greatest common divisor is 6.

Therefore, the two wires should be cut into small sections of the same length, and the longest length of each section is 6dm. A total of 18 can be truncated into 6

30 6 = 3 + 5 = 8 paragraphs.

The number A is (80)% of the number B, the number B is (125)% of the number A, the number A is less than the number B (20)%, the number B is more than the number A (25)%, the number A is about the sum of the numbers A and B (, the number B is the difference between the numbers A and B (500)%.

Little Red picked the total number of.

Bai one-fifth, Xiao Du Xing and Xiao Ming picked the west red.

The DAO weight ratio of Zhi persimmon is 3:2, and Xiaoxing has a capacity of 8 kilograms more than Xiaoming.

Do you know how many kilograms of tomatoes each of the three people pick?

Xiao Ming picked: 8 (3-2) 2 = 16 kg.

Xiaoxing picked: 16 + 8 = 24 kg.

The three of them picked a total of: (16 + 24) (1-1 5) = 50 kg Xiao Hong picked: 50-16-24 = 10 kg.

1-1 5 = 4 5 Xiaoxing and Xiao Ming picked, and the four parts were divided into 3 + 2 = 5 parts, and each part was 4 5 = parts.

8 [3-2] = 8 [thousand grams] Answer.

Kilograms] picked by small stars.

Kilogram] picked by Xiao Ming.

40 [kg].

8 [kg] small red picked.

Let the salt be one, and the extra water will be three, so salt: 75 & 3 = 25 water: 25 * 24 = 600

75 (27-24) = 75 3 = 25 grams = kilograms.

25 24 = 600 grams = kilograms.

It turned out that the salt in the bottle weighed kilograms, and the water weighed kilograms.

Three-quarters: four-fifteenths = five-eighths: two-ninths.

Three-quarters: five-eighths = four-fifteenths: two-nines or eight

The number A is 40 and the number B is 50

The number A is (80)% of the number B, the number B is (125)% of the number A, the number A is less than the number B (20)%, the number B is more than the number A (25)%, the number A is about the sum of the numbers A and B (44)%, and the number B is the difference between the numbers A and B (500)%.

1.If A and B buy no more than 10 pieces, then the difference between the two payments is a multiple of 5, if A and B buy more than 10 pieces, then the difference between the two payments is a multiple of 3, both assumptions are not in line with the topic, so A buys less than 10, B buys more than 1011=5+3+3, so B buys 3 more pieces than A, A buys 9 pieces, and B buys 12 pieces.

2.Let Master Wang take x hours, then Master Li takes (21 4 - x) hours, 8x = 6 (21 4 - x), and the solution is x=9, 48 x 9, 4 x 2, =36 (pcs).

So there are 32 parts in this batch.

3.Today's children are so pitiful, I want to think about how this question is calculated = = But the question is correct, right?

4.The conditions are indeed incomplete, please revise them.

5.Wrong Question Given that the height of the parallelogram cannot be longer than the length of the longest side, the question is incorrect.

If you don't understand, you can ask.

Is there a problem with the first question?。。 Isn't it only possible to buy it once? No more than 10 pieces. How do you say that the excess part is exceeded?? It's not logical...

The second question is set for A to do x hours and B to do y hours... x+y=21 4 8x=6y The solution y=3 x=9 4 There are 8x+6y=36 parts in this batch.

The third question you check the next question, that"2004-11-3''I don't know what that means.

Question 4 "The speed of the truck is the speed of the bus" is what it is? You didn't say the conditions either.

The fifth question is a problem.,5 is hypotenuse.,42 is high.,It's a perpendicular line.,How can it be longer than 5.,Can't form a triangle.,I didn't pay attention to it before.。。。

。Questions 1, 3, 4, you check the next question.

It's not like a 6th grade question... I miss elementary school so much. Now they're all in college...

Hmm, isn't this the sixth grade?,I'm also in the sixth grade.,But I haven't encountered this kind of problem.,Is this person's teaching version or the Sujiao version?

Team A 60 Team B 105

Actual 800 (it seems to be).

cm width 9

If a quarter of ax is equal to a fifth of a bx, then a:b = ( 4:5 ).

The height of the cylinder is constant, and its volume is proportional to the radius of the base.

If y = five thousandths of x (x, y are not 0), then x and y are (inversely proportional) proportional (or disproportionate).

1.A 60 B 105

Find x x = 800 800cm = 8m

200=x:10000 Find x=50

4=:x Find.

Fill in the blank: 52Bottom area 3Anti.

1.Set a x

x/(x-45)=7/4,x=105

B 60, A 105

52.Bottom area 3Anti.

1.45 (7-4)=15 15*4=60 Party B 15*7=105 Party A.

Fill in the blank 4:5 base area inversely 1 2

:7=x:(x+45) x=60 x+45=105 105 for Team A 60 for Team B.

32 = 25: x x = 800 cm = 8 m : 200 = x : 100 x = m = 50 cm : 4 = x x = 9 cm

Base area. Inverse proportion.

1.B x

x (x+45) = 4 7, x = 60, B 60, A 105

52.Base area.

3.Anti-4(1): a=2/a: (2).