6th Grade Math Thinking Questions! Hurry!

The average score of Chinese English is 3 points less than the average score of the three subjects of Chinese Mathematics and English, i.e. 3 3 9 points more than the average score of Chinese English, which is expressed as.

Mathematics (Chinese English) 2 9 i.e.: Chinese English (Mathematics 9) 2 Because the score in Mathematics is more than the average score of the three subjects (1 15), it is expressed as.

Mathematics (Chinese, English, Mathematics) 3 (1, 1, 15) and because: Chinese, English (Mathematics 9) 2 So.

Math (Math 9) 2 Math 3 (1 1 15) Collated.

Mathematics 96 points.

Let's start with x, y, and z for language.

According to the title: ((x+z) 2)+3=(x+y+z) 3......①y=((x+y+z)/3)*(1+1/15)……It can be deduced from y=(16 45)*(x+y+z)......The solution yields y=(16 29)(x+z).

y=((x+z) 2)+9...... can be deduced from(16 29)(x+z)=((x+z) 2)+9......Obtained by (x+z)=3*58=174......Overall score in Chinese and English.

Substituting (x+z)=174 into y=(16 29)*(x+z) yields: y=96......Math grades.

First of all, math is higher than average.

3*2=6 points.

So the average score.

6 divided by 1 15 = 90 points.

Math grades are:

90 + 6 = 96 points.

We can start by setting Chinese + English as x, math as y, x 2=(x+y) 3-3....1)

y=(x+y)/3*16/15 (2)

Composed. 1) Gotcha.

3x=2x+2y-18

x=2y-18 brings in (2).

Get y=96

Let the total score of the three subjects be x and the math score be y, and the one-dimensional quadratic equation will be solved according to the conditions.

Assuming that the total score of Mathematics Chinese and English is x and the score of Mathematics is y, then there is a question to be known:

x-y)/2+3=x/3

x/3+1/15=y

There are X points for Chinese, Y points for mathematics, and Z points for English.

x+y)/2+3=(x+y+z)/3

y-(x+y+z)/3=(x+y+z)/3*(1/15)

1: There are x days of sunny days, and there are 6-x days of rainy days.

100x+（6—x）*60=520

x=4, there are 4 sunny days and 2 rainy days.

2: AB The two places are x kilometers apart.

x—2/5x—168）：（2/5x+168）=1：43/5x—168）*4=2/5x+168

2x=5*168

x = 420, ab and the two places are 420 km apart.

A: There are 4 sunny days and 2 rainy days.

2. On the second day, the total length of 2 5 1 4 = 1 10168 1 4 = 42 kilometers was repaired.

420 km.

A: AB and the two places are 420 kilometers apart.

1. Solution: If 6 days are sunny, then 6 days can be repaired:

100 meters 6 = 600 meters.

The actual repair is 520 meters, so the number of rainy days is:

2 days. The number of sunny days is:

6-2 = 4 days.

If there are x sunny days, then the rainy days are 6-x days.

100x+60（6-x）=520

100x+360-60x=520

100x-60x=520-360

40x=160x=4

There are 4 sunny days and 2 rainy days.

Assuming that all six days are sunny, then 100 6 = 600 meters, minus the actual number of meters, divided by the difference in efficiency, is the number of rainy days.

600-520) m (100-60) m = 2 days.

2) Let the full length be x.

x-2/5x-168=（2/5x+168）÷4x=420

The area of the overlapping portions.

85 square centimeters.

The area of each black arc.

45 square centimeters.

The area of the blank part of each circle.

40 square centimeters.

The area of each round piece of paper.

85 square centimeters.

A said, "If you give me 100 kilograms of rice, we will have the same amount, and B will have 200 kilograms more than A."

B has 200*2 (1-1 5)-100=400 kg of rice.

A 400-200 = 200 kg of rice.

radius = 24 3 = 8

shaded part area square centimeters).

Side length = 6, radius = 2

s sector = 1 4*

If the shaded part is fan-shaped, then the area =

If the shaded part is divided into sectors, then the area =

The fan radius is 1 3*24=8 cm.

Sector area = 1 4 Circle area = 1 4 * square centimeter square area = 24 * 24 = 576 square centimeters.

Shadow area = square - sector = square centimeter.

As the question: the radius of the fan is 8cm, and the fan area is a right angle, so it is a quarter of a circle area. s sector = 8*8*

Square area = 24 * 24 = 576. Shaded area =

Let the circumference of the tire be meters is the distance the wheel rolls, that is, it rolls (1400 x) turns. Therefore, the time taken is:

1400/x)/100=20

Solution, x = that is, the circumference of the tire is meters.

Distance divided by time = speed gives 1400 divided by 20 = 70 meters.

70 divided by 100 = meters.

Each revolution of the wheel goes in meters, which is the circumference of this tire.

1400 20 = 70 (m).

70 100 = meters).

My upstairs upstairs is too rusty with your head too much?? It doesn't matter what Xiao Ming walks, the distance is there, and you know the time you have to ride the bike, can't you find out how many meters the bike walks per minute, and you know how many turns the bike turns per minute, and you can divide the number of cycles per minute by the number of cycles the bike walks per minute.

Speed = 1400 20 = 70 m min.

Circumference = 70 100 = meters.

Distance walked in one minute = 1400 20 = 70m

Bicycle circumference length = 70 100 =

Let the perimeter be y, 20x100y=1400

then 2000y = 1400

The solution is y=m.

Assuming that the circumference is d, this problem is, dx100x20=1400 meters.

Get d=m, little bike! Bikes don't have such short tires in general!

20 times 100 equals 2000, and it turns for a few weeks.

1400 2000 is OK.

1400 divided by 20 divided by 100 = meters.

Multiply? (Count yourself).

This topic is very.,How do you ask for it.。。 Xiao Ming is definitely not walking in a straight line. He's not Superman.