![](data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 72 71" width="72"></svg>)
The ratio of the number of girls in Grade 6 to that in Grade 6 is 60 to 236 I'm sorry. I'm sorry. It's 60 to 125
60:125=48:100
Homework, a few math problems, sixth grade primary school
Off form calculation
(1) 5 and 7 / 12 + 3 / 8-7 / 12 + 5 / 8, for example, 3 / 8 means 3 / 8
(2) 4 and 1 / 12-3 and 3 / 4 * 0.6 divided by 3 / 4 * this is the division sign of the title^_^
(3) 0.4 * 1.09 divided by 1 / 25
(4) (5.7 * 2 and 2 / 19-4 and 5 / 9) divided by 2 / 9
Just a few questions, remember to be easy to calculate, oh, I have to hand it in tomorrow, so it's better to answer it tonight, good bonus~
(1) 5 and 7 / 12 + 3 / 8-7 / 12 + 5 / 8, for example, 3 / 8 is read as 3 / 8
=(5,7 / 12-7 / 12) + (3 / 8 + 5 / 8)
=5+1
=6
(2) 4 and 1 / 12-3 and 3 / 4 * 0.6 divided by 3 / 4
=4 and 1 / 12-15 / 4 * 3 / 5 * 4 / 3
=4 1 / 12-3
=1 and 1 / 12
(3) 0.4 * 1.09 divided by 1 / 25
=0.4*1.09*25
=(0.4*25)*1.09
=10*1.09
=10.9
(4) (5.7 * 2 and 2 / 19-4 and 5 / 9) divided by 2 / 9
=(57 / 10 * 40 / 19-4 and 5 / 9) divided by 2 / 9
=(12-4 and 5 / 9) * 9 / 2
=7 and 4 / 9 * 9 / 2
=67/9*9/2
=67/2
=33 and 1 / 2
In a container full of water, put a square block of wood with 4 cm edge length and float on the water. The depth of the block is 3.14 cm. Now pour the spilled water into a cylindrical water cup with 2 cm bottom radius and 6 cm height. How much of the height of the water surface accounts for?
Volume of overflow water = 4 * 4 * 3.14 = 50.24 cm3
Height of water surface = 50.24 / (3.14 * 2 * 2) = 4cm
Proportion of height: 4 / 6 = 2 / 3
RELATED INFORMATIONS
- 1. For a square brick, the ratio of length to width is 2:1, and the ratio of height to width is 2:1. The total length of all edges of this brick is 140 cm. What is the length, width and height
- 2. [black rabbit] y white rabbit] 8 more than black rabbit] refers to y rabbit] refers to 8 more than black rabbit
- 3. 2 × 1 / 3 = 1 / 2 - 1 / 3, 3 × 1 / 4 = 1 / 3 - 1 / 4, 2 × 1 / 4 = 1 / 2 × (1 / 2 - 1 / 4) 1、 What do you find in it? 2、 Use your findings to work out the following two questions （1）1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90 （2）1/1×4+1/4×7+1/7×10+1/10×13+1/13×16
- 4. The most difficult math problem in the world o o o o o o o o o o o o o o o o o o o o o o o o Connect each circle with a straight line, not a diagonal line, not a blank line, not a cross line
- 5. There are 20 students in the mathematics group doing two mathematical thinking problems together. There are 10 students doing the first problem right and 15 students doing the second problem right. There are 2 students doing both problems wrong. How many students are doing both problems right?
- 6. 1. Liang Liang read a story book. He read 30% of the whole book on the first day, 40% of the whole book on the second day, and 398 pages in two days. How many pages are there in this book? 2. There are 5000 ducks and chickens in a farm. The ratio of ducks and chickens is 7:10. How many more chickens are raised than ducks?
- 7. One hundred monks eat one hundred steamed buns. The big monk eats four steamed buns each. The little monk eats one steamed buns every four. How many people do you ask the big monk and the little monk?
- 8. Please set X to solve the problem (there are three problems) 1: 8 times of a number plus 10 equals 10 times of the number minus 8 to find the number 2: The average of the two numbers is 24.6. The number a is twice the number B. what is the number B? 3: Mom bought three bags of milk and a bottle of drink, which cost 10.35 yuan. The price of each bottle of drink is 1.5 times that of each bag of milk. How much are the prices of drinks and milk?
- 9. There's a math problem like this, X2-A If and only if x = - 1, the value of the fraction is 0. If x = - 3, the fraction is meaningless. Try to find out X2+BX+C A B C value, Because I can't input the square of X, let's use x 2 instead, an eager mother
- 10. A math problem is like this: When Xiao Lin typed a manuscript, the ratio of typed to untapped was 5:3. If he typed another 140 words, the ratio of typed to untapped would become 4:1. How many words are there in this manuscript?
- 11. 1. The income ratio of Zhang Jia and Li Jia this month is 8:5, and the expenditure ratio this month is 8:3. At the end of the month, Zhang Jia saved 240 yuan and Li Jia saved 510 yuan? 2. The ratio of tons of grain stored in warehouse A and warehouse B was 8:7, and the ratio of tons of grain transported out this month was 4:1. At the end of the month, there were 400 tons of grain in both warehouses. How many tons of grain was stored in warehouse a?
- 12. Three math problems. Urgent 1. The 4-meter-long rope is cut into 9 sections on average. How many meters are the two sections taken out? 2. A △ B = 18, then what is the least common multiple of a and B? 3. There is a cuboid ice storage container which is 80cm long, 60cm wide and 115cm high. It is filled with cubes of the same size. How many cubes of ice can this container hold at least?
- 13. Math questions, correct answers, score recovery 1. If m square + M-1 = 0, find m cube + 2m square + 20142. Prove that the value of polynomial (A-2) (a square + 2A + 4) - [3A (a + 1) square - 2A (A-1) square - (3a + 1) (3a-1)] + a (1 + a) has nothing to do with the value of A
- 14. Find the range of the following functions. 1. Y = x2-5x = 6 (x is greater than or equal to - 3, less than or equal to 2) 2. The absolute value of the difference of y = (x2-2x) + 1
- 15. 1. A freighter travels an average of 48 kilometers per hour. It takes 5 hours to get from port a to port B. when it returns, it goes against the current, and its speed is one sixth slower than that in the current. How long does it take for this freighter to go back and forth? 2. It will take 10 days for the two engineering teams to complete a project together. Now team a will do it for three days, and then team B will do it for four days. Three eighths of the project will be completed. How many days will it take for the two teams to complete the project independently?
- 16. A and B travel from 1200km to each other at the same time. A walks 55km per minute, B 55m per minute and B 45m per minute. The shortest distance between the two vehicles is 200km in a few hours. If they continue to drive in the same direction, in a few hours, the distance between the two vehicles will be 200km?
- 17. Help to do the following math problems 1. In the following equations, the quadratic equation with respect to X is () A. The square of 3 (x + 1) = 2 (x + 1) B. Square of 1 / x + 1 / X-2 = 0 C. The square of AX + BX + C = 0 D. Square of X + 2x = square of X-1 2. The root of equation 2x (x-3) = 5 (x-3) is () A.x=1/2 B.X=3 C.X1=5/2,X2=3 D.X=5/2 3. For any real number x, the square of polynomial x-2x + 3 is a () A. Positive number B. Negative number C. Nonnegative number D. Not sure 4. If there are two unequal real roots of the square - 6x + 9 = 0 of the quadratic equation KX with respect to x, then the value range of K is () A.K＜1 B.K≠0 C. K ＜ 1 and K ≠ 0 D.k＞1
- 18. First, put six identical cubes into a cuboid (horizontally, three in front and three in back, because there is no picture, so it is). The surface area of this cuboid is 220 square centimeters. How many square centimeters is the surface area of each cube? Second: the edge length of a cube glass fish tank is 6 decimeters. How many square decimeters does it need to make the fish tank? How much space does the fish tank occupy? (there is no cover on the fish tank) Third: Shanghai Oriental Pearl TV Tower is 468 meters high, 31 times higher than the average residential building 3 meters. How many meters is this ordinary residential building? Fourth: Mr. Li can type 80 words per minute. Mr. Zhang's typing speed is 3 / 4 of that of Mr. Li and 5 / 6 of that of Mr. Huang. How many words can Mr. Huang type per minute?
- 19. Football is made of black and white leather, black leather is 5-Sided, white leather is 6-sided. A football Black Leather 12, then white leather? It has a picture A piece of white skin has only three sides connected with black skin. The other three are white.
- 20. Yes, please give me the answer It is known that in one square kilometer of land, the energy obtained by the sun in one year is equivalent to the energy generated by burning 1.3 × 10 5-th-power tons of coal. So, in China's territory of 9.6 × 10 6-th-power square kilometer, the energy obtained from the sun in one year is equivalent to the heat generated by burning about how many tons of coal?