\(\frac{x}{5}=\frac{26}{65}\)
\(x:5=\frac{26}{65}\)
\(x=\frac{26}{65}\times5\)
\(x=2\)
Vậy x = 2
áp dụng tính chất
a/b=c/d
nên a*d=b*c
nhân chéo ta được
5x26=65*x
130=65*x
x=130:65
x=2
Tính nhanh:\(\frac{11}{3}x\frac{26}{7}-\frac{26}{7}x\frac{8}{3}\)
\(\frac{5}{14}\)X \(\frac{7}{13}\)X \(\frac{26}{25}\)
TÍNH BẰNG CÁCH THUẬN TIỆN
| x\5=26\65 | |
|
3\x=51\85 |
|
\(\frac{11}{3}\)x\(\frac{26}{7}\)-\(\frac{26}{7}\)x\(\frac{8}{3}\)
a, X/3 = 10/15
b, X/5 = 26/65
Tính bằng cách hợp lý
\(11\frac{4}{5}-\left(17\frac{3}{4}+11\frac{4}{5}\right)+2\frac{3}{4}\)\(4\frac{11}{23}+3\frac{4}{5}-2\frac{11}{23}\)\(\frac{-27}{26}-\frac{-5}{21}+\frac{1}{26}+\frac{16}{21}+50\%\)\(-2\frac{2}{3}+\left(-0,2\right)+1.75-\frac{5}{0}+0,7\)
\(\frac{x}{4}\)=\(\frac{26}{26}\)
tìm x
x/5 = 26/65 3/x = 51/85
a)\(\frac{399x45+55x399}{1995x1996-1991x1995}\)
b)\(\frac{1995x1993-18}{1975x1993x1994}\)
c) 217x ( 63 + 26 ) - 216 x ( 63 + 26 ) - ( 63 - 26 )
d)\(\frac{2012x1999-2011x999}{2012x999+2012}\)
