Answers to the six math supplementary exercises: P 52 53 !!!!!!!!!!!!! 20

p52 a. 1 .40°-10°c 2. 3 . 4. 100/49 5. 85%

Two. Three million two hundred twenty thousand six hundred thirty thousand forty thousand fourteen thousand nine hundred sixty million one hundred thousand three thousand and twenty.

Three. Ten thousand.

Four. Percent 1 9 4 Two One Million Two Ten Two Two Five. Wrong, wrong, wrong.

p52. 1. 40% -10% m m kg 49 100 tons 85% 2 32 million 630000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

3. Ten thousand.

Fourth, the percentile 10th place 1 9 4 2 1000000 20 2 1% 1 2 thousandths.

p. 53.

1. (1,5,25)(13,26,39)(6,21,51)(5,21,31,51)(2,6) (2)(4)(3)(36).

II. III. There are 18.

Fourth, there are 6.

V. =

6. 1 2 30%.

All Guaranteed!

We are Zhejiang. How many questions are there.

52 of 40 degrees Celsius -10 degrees Celsius 100 45 85 percent slightly Judgment: False, wrong, wrong.

The area of the shaded part is the sum of the areas of the three (1 4) circles.

It's just that their radii are cm

s=1/4π（2^2+3^2+4^2)

1/4πx29

Hope it helps!

There should also be a radius of 1 4 circles drawn with AD.

The area of the shaded part is the sum of the areas of the three (1 4) circles.

The radii are cm., respectively

s=1/4π（2^2+3^2+4^2)

1/4πx29=

1.If x people move bricks, then kx+20=9(x-1)+6, that is, (9-k)x=23, because x and k must be rounded and greater than 0, and there are 23=23*1, so x=23, k=8

1: There are x people moving bricks, and the equation kx+20=9x—9+6 can be solved x=23 9—k (k is also unknown, and it can only be expressed like this in the end) 2: There are x books of literature and art, and there are y books of science and technology, and the system of equations can be obtained x 5+y 10=170 x+y=1200 and x=500 y=700

3: Multiplying 4000 by 11 percent is equal to 440, Mr. Chen's remuneration cannot be higher than 4,000 yuan, and if he is paid x yuan, the equation (x-800) x=434 can be solved to obtain x=3900 yuan.

4: Suppose there is a total of x, the equation can be obtained in this book, 65 x+45 x-40=x, and the solution is x=4005: if x, the money paid by the two preferential methods is the same, and the equation can be obtained (10+ x=40 minutes. Hope.

The first group planted x trees, the second group planted Y trees, and the third group planted Z trees.

x+y+z=130

2x=3y3y=4z

The solution yields x=60, y=40, and z=30

A: The first group planted 60 trees, the second group planted 40 trees, and the third group planted 30 trees.

2 Because, Xiaojun walked a quarter more than Xiaohong, so Xiaohong walked a distance of 1-1 4=3 4

Because it takes 1/10 more time for Xiaohong to walk than Xiaojun, the time it takes for Xiaohong to walk is 1+1 10=11 10

3 4 divided by 11 10 = 15 22

1 divided by 1 = 1

The speed ratio of Xiaojun and Xiaohong is 1:15 22, and it is 22:15 after simplificationAnswer: The speed ratio of Xiaojun and Xiaohong is 22:15

1. Solve the original planned production quantity first.

456 (1-5%) = 480 units.

2. Then solve the latest production quantity.

480 (1+15%)=552 units.

3. Finally, find the unfinished quantity.

552-456 = 96 units, that is, 96 units need to be produced to complete the new task.

And also to complete the quantity.

96 units. If there is something you don't understand, ask again, I wish you to learn and make progress and go to the next level! (

456*5% equipment rounded up to 23 rounded up the same below.

The total contract is 456+23 479 units, 479*15% 72 units.

Therefore, it is necessary to produce 23+72 95 units to be completed, and I don't know if it is right or not.

The original contract order number is 456 (1-5%) = 480 (sets), and the current order number is 480 (1 + 15%) = 552 (sets), and it will be 552-456 = 96 (sets).

I don't know how to ask questions.

456 divided by (1-5%) of the difference, that is, the number of orders under the contract is 480 units, and the number of orders under the contract is 480 units multiplied by 15% is the increase in the number of orders by 96 units.