The answer to question 15.16.17 on page 102 of the sixth grade mathematics textbook people's education press, thank you

The answer to question 15.16.17 on page 102 of the sixth grade mathematics textbook people's education press, thank you

15. 47.1 m 56.52 M2
16. Surface area: 2690.8 square meters volume: 14280 cubic meters
17. 10 1250 cm3 650 cm2

People's education press seventh grade mathematics volume II 108 page 1.2

Suppose that the solution containing 30% and 75% of the medicine is XKG and ykG
According to the meaning of the title
x+y=18
30% x + 75% y = 18 × 50% (it is a system of equations)
The solution of the equations is x = 10
y=8
A: take 10kg of liquid medicine containing 30% and 8kg of liquid medicine containing 75%

Three questions on page 108 of the seventh grade volume of mathematics of people's Education Press

Let the average speed of the first day be x km / h, and the average speed of the second day be y km / h
4x+5y=98
4x+2=5y
The solution is as follows
x=12
y=10
The calculation is correct

Sesame blossom · pilot new curriculum mathematics exercise book (with people's Education Edition) grade 5 Volume 2 20 page answers
Well, I want to check with my answer,

A cuboid covers an area of 40 square centimeters, its height is 25 centimeters, and its volume is [] cubic centimeters

(radical 5-radical 3) / (radical 5 + radical 3)
Radical 18 / (radical 3 + radical 6)

4-radical 15
2 radical 3-radical 6

Unit conversion 2000 milliliter is equal to how many jin? Urgent!
Sorghum liquor

Unit of volume per milliliter
Volume unit
Jin is a unit of weight
The conversion between them needs to know the density of the converted object
Water is generally used as a benchmark
If it's water, it's 2kg, or 4kg

As shown in the figure, in the quadrilateral ABCD, ad ∥ BC, e is the midpoint of CD, connecting AE, be, be ⊥ AE, extending the extension line of AE intersecting BC at point F. verification: (1) FC = ad; (2) AB = BC + ad

The following results are proved: (1) ad BC (known), ADC = ∠ ECF (two lines are parallel and the internal stagger angle is equal), e is the midpoint of CD (known), de = EC (definition of midpoint). ∵ in △ ade and △ FCE, ≌ ADC = ecfde = EC ∠ AED = CEF, ≌ ade ≌ FCE (ASA), FC = ad (?)

|1/101-1/102|+|1/102-1/103|+|1/103-1/104|+…… +|1/109-1/110|
Is there an easy way? If so, please explain why it is so easy
Thank you!

Because 1 / 101 > 1 / 102 > 1 / 103 >... > 1 / 110
So the original formula = 1 / 101 - 1 / 102 + 1 / 102 - 1 / 103 +... + 1 / 109 - 1 / 110
= 1/101 - 1/110
= 9/11110

The meaning of "+", "one", "X" and "△" in solving "cipher equation" in sixth grade mathematics of primary school is the same as the common usage, but 0, 1, 2
The following are some "cipher equations". The meanings of "+", "one", "X", "etc. in the expressions are the same as those in common usage, but the meanings represented by numbers such as 0, 1, 2, 3 and. 9 are different from those in common usage
①1X5=1 ②7X2=96 ③99-5=3
④83÷4=4 ⑤5X5X5X5X5X5X5=6 ⑥9+7X8=97
Please crack the secret of these "cipher equations" and find out the common meaning of each number
(2) the common meaning of 2010 is represented by the meaning of the number in the "cipher equation". How to express it?
(3) if the meaning represented by the number in the "cipher equation" is adopted, what is 60 + 06 equal to?

If it's 5x5x5 = 6, let's talk about it briefly. Let's go from ①, or 1 is 0, or 5 is 1, and because of ⑤, 1 is 0, by ⑤, only 5 is 2, 6 is 8, by ③, basically only 9 is 1, by ②, 7 and 3 can only be 3 and 6 (2 has been used). Let's try by ⑥, confirm 7

People's education press primary school fourth grade second volume Chinese matching exercise book answers!

I'm so sorry. I'm always like this. When the teacher confiscates the answers, they can copy them or borrow them from others