2 Easy 6th Grade Math Problems 30

1. Solution: the speed of the minibus is 4 5 of the taxi speed, when meeting, the trip of the minibus is 4 5 of the taxi trip, then the journey of the minibus is 4 (4 + 5) = 4 9 of the distance between A and B, then the distance between the bus and the midpoint of the meeting is 1 2-4 9 1 18 of the distance between A and B, and the distance between A and B is: kilometers.

A: The distance between A and B is 81 km.

2. Solution: The area of the top: 10*5=50 square meters.

The area of the four walls: 5* square meters.

The size of the window: 20 square meters.

Total area: 50+84-20=114 square meters.

A: 114 square meters of wallpaper is required.

A taxi and a minibus depart from A and B at the same time, and meet at a distance of kilometers from the midpoint, and the speed of the minibus is known to be four-fifths of the speed of the taxi, how many kilometers is the distance between A and B?

A room is 10 meters long, 5 meters wide, and meters high, and you need to paste wallpaper on the four walls and the top, and the door and window area is 20 square meters, how many square meters of wallpaper do you need?

114m^2

1. If the taxi speed is x, the bus speed is 4x 5 and the time required for the two cars to meet is a

then there is ax-4ax 5=

i.e. ax 5=

The distance between A and B is ax+4ax 5=9ax 5=9·2, top: 10·5=50

Four Walls: Windows: 20 Total: 50 + 84 - 20 = 114

By: Cylmhsn - Manager Level 5.

is correct.

In particular, the first problem is also very well solved, and there is no need to solve equations.

I don't understand"45 km from the midpoint"What does it mean?

1. Cylindrical volume = bottom area * height, steel weight is ( * 1 * kg ) 2, is to get a cone, cone area = 1 3 bottom area * high volume is (1 3) * = cubic meters).

It seems that everyone is very enthusiastic, but some people have miscalculated, it should be cubic meters = cubic decimeters = 28260 cubic centimeters, these people, hey.

Good luck!

Decimeter = meter.

Cylinder volume = cubic meters).

kg) 2Take a right-angled side of a triangle with two right-angled sides of 3 decimeters as the axis to rotate one (cone), and the volume of this (cone) is (cubic decimeter = cubic meter).

1.A section of the cylinder is 1 meter long and has a base diameter of 2 decimeters. Kilograms of steel per cubic meter. How many kilograms does this round bar weigh?

The base radius is.

2 2 1 (decimeter) meter).

The volume is cubic meters).

The weight is kilograms).

2.Take a right-angled side of a triangle with two right-angled sides of 3 decimeters as the axis to rotate one (cone), and the volume of this (cone) is () cubic meters.

3 1/3 cubic decimeter) cubic meter).

m = 10 decimeters.

The base area is *2 2=square centimeters).

The volume is cubic centimeters).

The weight is kilograms).

2. Cone, conical cubic centimeter.

1. Kilograms.

2. Get a cone, and the volume of this cone is cubic meters.

The bottom area answers: good is 9 decimeters.

A: The volume of a cylinder of equal height is 18 cubic meters.

1) 56708 (reserved to hundred).

2) Keep three significant figures).

3) Which of the approximate numbers rounded below is exact? How many significant figures are there in each?

billion to the 5th power.

Accurate to the tenth place has 2 significant figures, accurate to the ten place has 2 significant figures, accurate to the thousandth place.

Hehe, the process is clear enough, a request! @

1. Keep to the 100th place and round the number to the 10th place The result is 567002, the significant figure is calculated from the first number on the left that is not 0 The result is 3, 100 million is accurate to the million digits, and the significant figure is 3 because the unit is 100 million.

Accurate to the thousands, the significant number of digits is also 3

Accurate to the thousandth place, the significant figure is also 3

1. How much money is used for food?

1000 30 300 (yuan).

Answer: 2, How much money was used to repay the home loan?

1000 30 300 (yuan).

A: 3, How much money is spent on education?

1000 15 = 150 (yuan).

A: 4, How much does the costume cost?

1000 10 = 100 (yuan).

A: 5, How much does water and electricity cost?

1000 5 = 50 (yuan).

A: 6, How much did the others cost?

1000 10 = 100 (yuan).

Answer: Note: "" means omitted and not written.

Landlord, see me typing these out word by word, you can be kind, add points, and then give me points

I know that the landlord is the kindest person in the world

How much more does food cost more than utility bills?

How much did it cost to pay off the mortgage and education?

Food = 30% * 1000 = 300 yuan.

Home loan = 30% * 1000 = 300 yuan.

Education = 15% 1000 = 150 yuan.

Clothing = 10% * 1000 = 100 yuan.

Hydropower = 5% 1000 = 50 yuan.

Others = 10% * 1000 = 100 yuan.

300 for food, 300 for home loans, 150 for education, 100 for clothing, 50 for water and electricity, and 100 for others.

3.m = 150 cm.

A———==

A———5Perimeter meters.

Answer: Every minute of forward meters, every minute of road square meters.

1.Pi is the quotient obtained by dividing (circumference) by (diameter).

2 When drawing a circle, the distance between the toes of the compass is the radius of the circle, the position of the circle is determined by the center of the circle, and the size of the circle is determined by the diameter.

3.The radius of a circle is 3 centimeters, the circumference is (cm), and the area is (square centimeters.

4.When the radius of a circle is expanded by a factor of 3, the diameter is enlarged by a factor of (6), the circumference is also expanded by a factor of several times (6), and the area is expanded by a factor of (36).

The circumference is divided by half of the diameter The tip of the compass Radius is troublesome, calculate it yourself Give me some points to ask for.

1.Circumference Diameter.

2.Radius Center of the circle radius.

Upstairs ......I felt speechless, I didn't answer the questions well, and I had to divide ......

1 circumference diameter.

2 Radius Center of the circle radius.

1. Solution: 2 3 hours = 2 3 * 60 = 40 minutes then: a total of 40 * 80 = 3200 meters Answer: Xiaohong's father walked a total of 3200 meters from home to work.

2. Solution: A total of 7 8 tons of flour, then: the mass of flour used on the first day is 7 8 * 3 14 = 3 16 tons.

Then two days to share: 3 16 + 3 16 = 6 16 tons A: two days to share 3 16 tons of flour.

3. Solution: Cut 1 5 for the first time: 5 * 1 5 = 1 meter; This remains: 5 - 1 = 4 meters.

The second cut of the remaining 1 5, then there is 4 * 1 5 = 4 5 meters Answer: The second cut 4 5 meters.

1,3200 meters, another answer, tomorrow is not yet there, and I haven't gone yet.

2, two answers, 1The next day was three-sixteenths of what was bought, seven-eighths multiplied by three-fourteenths plus seven-eighths multiplied by three-sixteenths, 2The next day is used for the remaining three-sixteenths, seven-eighths multiplied by three-fourteenths plus [7 8-(7 8*3 14)]*3 16 meters, meters.