\(x=\dfrac{11}{55}+\dfrac{5}{55}=\dfrac{16}{55}\)
\(x=\dfrac{1}{5}+\dfrac{1}{11}\)
\(x=\dfrac{16}{55}\)
\(x=\dfrac{1}{5}+\dfrac{1}{11}\)
\(x=\dfrac{11}{55}+\dfrac{5}{55}\)
`=>x=16/55`
\(x=\dfrac{11}{55}+\dfrac{5}{55}=\dfrac{16}{55}\)
\(x=\dfrac{1}{5}+\dfrac{1}{11}\)
\(x=\dfrac{16}{55}\)
\(x=\dfrac{1}{5}+\dfrac{1}{11}\)
\(x=\dfrac{11}{55}+\dfrac{5}{55}\)
`=>x=16/55`
Bài 1 Tìm x,biết
x.3/5=2/3
x.7/17=17/8
3/4 chia x=-7/12
3/8 - 1/6.x=1/4
1/3+1/2 chia x=-4
Bài 2 Tính
-6/11 chia [3/5 . 4/11]
7/12 + 5/12 chia 6 -11/36
[4/5 + 1/2] chia [3/13 - 8/13]
[2/3 - 1/4 + 5/11] chia [5/12 + 1 -7/11]
*Dấu . là dấu nhân nha mn*
11/3 x ( 1/5 - 1/2 )< hoặc bằng x <hoặc bằng 3/11 x (1/5 + 2/3 - 1/2)
A= ( 6 : 3/5 - 1 1/6 x 6/7 ) : ( 4 1/5 x 10/11 + 5 2/11 )
B= ( 1 - 1/2 ) x ( 1- 1/4 ) x ... x ( 1 - 1/2003 ) x ( 1 - 1/2004 )
C= 5 9/10 : 3/2 - ( 2 1/3 x 4 1/2 - 2 x 2 1/3 ) : 7/4
1/5*8+1/8+*11+1/11*14+........+1/x*(x+3)=1/18
tìm số tự nhiên x, biết: 1/5*8+1/8*11+1/11*14+...+1/x*(x+3)=1/18
-5/7 x 2/11 + -5/7 x 9/11 + 1
giúp mk nha mấy bn
1 Tính
a) 4/4.13+11/13.24+7/8.45
b) (1/10-1).(1/11-1).....(1/2017-1)
2 Tìm x
a) 5/6-(1/2+x)=1/5-2x+1/3-1/5
b) -5.(x+1/5)-1/2.(x-2/3)=3/2.x-5/6
c) 1/3.x+2/5.(x-1)=0
Tim so nguyen x , biet : 1 phan 6 = x phan 18 ; x phan 8 = -1 phan 4 ; 4 phan -5 = x phan 10 ; 11 phan 5 = -22 phan x ; x phan 8 = 8 phan x ; x phan -11 = -11 phan x
Thực hiện phép tính:
A) 7/38 x 9/11 +7/38 x 4/11 -7/38 x 2/11
B) 5/31 x 21/25 + 5/31 x -7/10 - 5/31 x 9/20
C) ( -2/3 + 3/7 ) : 4/5 + (-1/3 + 4/7 ) : 4/5
D) 5/9 : ( 1/11 -5/22 ) + 5/9 : ( 1/15 - 2/3 )
E) 3/14 : 1/28 -13/21 : 1/28 + 29/42 : 1/28 - 8
F) ( -40/51 x 0,32 x17/20) : 64/75
Đây là dấu x ( là nhân ) mọi người nhé
mong mn giúp em ạ
Bài 1:thực hiện phép tính(hợp lí nếu có thể):
1, -5/12 x 2/11 + -5/12 x 9/11 + 5/12
2, -3/5 : 7/5 - 3/5 : 7/5 + 2 3/5
3, 1/2+ 3/4 - ( 3/4 - 4/5)
4, 2/3 + 1/3 x ( -4/9 + 5/6)
5, -3/7 x 5/9 + 4/9 x -3/7 + ( - 2022) ^ 0
6,0,75 - ( 2 1/3 + 0,75) + 3 ^ 2 x ( -1/9)
7, 2 6/7 x [(-7/5 - 3/2 : -5/-4) + ( 3/2)^2]
8,2/7 + 5/7 x ( 3/5 - 0,25 ) x ( -2)^2 + 35%
9, 1 13/15 x 0,75 - ( 11/20 + 25%): 1 2/5
10, ( -2,4 + 1/3 ) : 3 1/10 + 75% : 1 1/2
11.5/3 - 5/7 + 5/9 / 10/3 - 10/7 + 10/9