The school bought a batch of new books, of which one technology book accounted for one sixth, literature and Art Book accounted for one third of the new batch, and the remaining 54 comic books in Germany. How many of these new books are there

The school bought a batch of new books, of which one technology book accounted for one sixth, literature and Art Book accounted for one third of the new batch, and the remaining 54 comic books in Germany. How many of these new books are there

The new books include:
54÷(1-1/6-1/3)
=54÷1/2
=108 copies
I wish learning progress, hope to adopt, do not understand welcome to ask

The school bought 1000 new books, of which 359 are story books, which account for a few percent of the total number of new books

359 per 1000

The school bought three kinds of books, among which the number of literature and art books accounts for 1 / 4 of the total number, and the number of science and technology books is 3 / 4 of story books. The number of literature and art books is 40 less than that of science and technology books. How many books are there in total?

If the total number is x, the literature and art books are 1 / 4x, the science and technology books are 1 / 4x + 40, and the story books are (1 / 4x + 40) * 4 / 3
1/4X+1/4X+40+（1/4X+40）*4/3=X
x =560

As shown in Figure 1, fold the square ABCD so that point B falls on a point E (not coincident with points c and D) on the edge of CD. After flattening, the crease Mn is obtained. When CE / CD = 1 / 2, calculate the
Am / BN value

Take the coordinate system: a (0,0), B (2,0), D (0,2), then E (1,2), f (1.5,1)
The equation of Mn: Y-1 = (1 / 2) (x-1.5)
Let x = 0. We get y = 0.25 & nbsp; that is, m (0,0.25) and n (2,1.25)
AM/BN＝0.25/1.25＝1/5

The ratio of 5 / 3 to 5 / 6 is []

The ratio of 5 / 3:6:5 is [2:1], and its ratio is [2] [urgent]

The operation of quadratic radical
If A.B.C is three sides of triangle ABC,
Simplification. Radical (a-b-c) ^ + radical (a-b + C)^
^Represents the square within the root

The sum of any two sides is greater than the third side
So a-b-c0
So the first radical is - A + B + C
The second is A-B + C
So the simplification: (- A + B + C) + (a-b + C) = 2C

The area of the circle in the figure is exactly 12 times that of the rectangle ABCD. The length of AB is 6.28cm, and the area of the shadow is______ Square centimeter

3.14 × (6.28 △ 2) 2 × 1.5 = 3.14 × 9.8596 × 1.5 = 30.959144 × 1.5 ≈ 46.44 (square centimeter); answer: the area of shadow part is 46 square centimeter. So the answer is: 46.44

Given that m and N are opposite numbers and satisfy (M + n) ^ 2 - (n + 4) ^ 2 = 16, find the value of m ^ 2 + n ^ 2-N / n

(m+4)²-(n+4)²=16
(m+4+n+4)(m+4-n-4)=16
m. N is opposite to each other, that is, M + n = 0
8*(2m)=16
m=1
n=-1
m²+n²-n/m=1+1+1/1=3

What can be calculated simply should be calculated simply!
(1) 9:2x0.375 (2) 4 △ 3:8-0.6 (3) 4:3x6:5 + 4:3x6:1
(4) 18 / 35 △ 0.6x3 / 2 (5) (2-0.6) △ 7 / 15 (6) 64 / 35 △ 1 / 8 + 3 / 4 (7) 4.05-2.8-0.7 (8) 12x (1 / 4 + 1 / 6-1 / 3)
(9) (4 / 5 + 1 / 4) △ 7 / 3 + 7 / 10

0.1125
one point three
4 points 9 points
21 and 8
fourteen point nine
thirty-five-eighths
one point two five
one
20 to 23

The perimeter of a rectangle is 180cm, and the ratio of its length to width is 2:1. What is the area of the rectangle

Width: 180 / 2 / 3 = 30cm
Length: 2 * 30 = 60cm
Area: 30 * 60 = 1800 square centimeter