\(=\dfrac{2}{3}\left(\dfrac{1}{3}+\dfrac{2}{5}\right)+\dfrac{3}{11}\cdot\dfrac{121}{4}\)
\(=\dfrac{2}{3}\cdot\dfrac{11}{15}+\dfrac{33}{4}\)
\(=\dfrac{22}{45}+\dfrac{33}{4}=\dfrac{1573}{180}\)
a) 2/3 -4 . (1/2 +3/4)
b) (-1/3 + 5/6) .11 7
c) -5/11 . 7/15 . 11/-5 . (-30)
d) -1/6 . -15/19 . 38/45
e) -5/9 . 3/11 + ( -13/18 . 3/11)
f) ( 2 2/15 . 9/17 . 3/32) : -3/17
a) 2/3 -4 . (1/2 +3/4)
b) (-1/3 + 5/6) .11 -7
c) -5/11 . 7/15 . 11/-5 . (-30)
d) -1/6 . -15/19 . 38/45
e) -5/9 . 3/11 + ( -13/18 . 3/11)
f) ( 2 2/15 . 9/17 . 3/32) : -3/17
1. Tính hợp lí
a, 6/7 . 5/11 + 5/7 . 2/11 - 5/7 . 14/ 11
b, 1/3 . 4/5 + 1/3 . 6/5 - 1/3
( Hỗn số )
c, 11/3/13 - (2/4/7 + 5/3/13)
d, 2/7 . 5/1/4 - 2/7 . 3/1/4
e, 75 . (-4/24 + 7/1/15 - 5/7/15)
Giải hộ mình với ạ!
3/2 . x + 3/7 = -4/5
-11/12 . x + 0.25 =5/6
(x - 2)2 =1
(2x - 1)3 = -8
tinh (2/3-1/4+5/11)-(5-1/3-6/5)-(6-7/4+3/2)
Thực hiện phép tính(tính nhanh nếu có thể)
a)\(\dfrac{-5}{9}.\dfrac{3}{11}+\dfrac{-13}{18}.\dfrac{3}{11}\)
b)\(\dfrac{11}{2}.2\dfrac{1}{3}-1\dfrac{1}{5}.1\dfrac{1}{2}\)
c)\(1\dfrac{1}{9}.\dfrac{2}{145}-4\dfrac{1}{3}-\dfrac{2}{145}+\dfrac{2}{145}\)
d)\(1-\dfrac{1}{2}+2-\dfrac{2}{3}+3-\dfrac{3}{4}+4-\dfrac{1}{4}-3-\dfrac{1}{3}-2-\dfrac{1}{2}-1\)
a) 11/12-(2/5+x)=2/3 b) 2x.(x-1/7)=0 c) 3/4+1/4:x=-2/5
Thực hiện phép tính
a) 6/7 + ( 2/11 - 6/7 )
b) 83/5 . -1/3 - 68/5 . -1/3 + 3/4
c) 7,2 + ( -3,7 + 2,8 ) -0,3
d) ( 3/2 - 0,5 ) ; (-3)^2 + 1/3 - 1/6
Tính bằng cách hợp lí :
A=\(\dfrac{5}{9}:\left(\dfrac{1}{11}-\dfrac{5}{2}\right)+\dfrac{5}{9}:\left(\dfrac{1}{15}-\dfrac{2}{3}\right)\)
B=\(\left(6-\dfrac{2}{3}+\dfrac{1}{2}\right)-\left(5+\dfrac{5}{3}-\dfrac{3}{2}\right)-\left(3-\dfrac{7}{3}+\dfrac{5}{2}\right)\)
