Ta có \(\frac{2}{9}+2\frac{4}{9}\times\frac{1}{2}-3:1\frac{1}{2}\)
\(=\frac{2}{9}+\frac{22}{9}\times\frac{1}{2}-3:\frac{3}{2}\)
\(=\frac{2}{9}+\frac{11}{9}-\frac{6}{3}\)
\(=\frac{13}{9}-\frac{18}{9}\)
\(=\frac{13-18}{9}\)
\(=-\frac{5}{9}\)
Vậy \(x=-\frac{5}{9}\)
1va1/3 + 1va 1/5 x y- 4/5=2va4/5
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
tinh gia tri bieu thuc
3/4 x 8,4 +2,8 x 1va1/2
1va1/2 la hon so nha
2/3 * X : 1/5 = 1va1/3 :1/4
Tình nhanh :
1 + 1/2 + 1/3 + 1/4 + 1/5 +...+1/8 + 1/9 Phần 1/1x9 + 1/2x8 + 1/3x7 +...+1/8x2 + 1/9x1
tính nhanh
a)11/5+5/7+2/7+4/15
b)5/9x1/2+5/9x6/4
c)7/8:1/2+9/8:1/2
d)17/10:1/2-7/10
1va1 phan 2 +1 va 1 phan 3
5va 1/3+2va2/5+1va1/9=