Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
5/9 x 5/11 + 5/11 x 4/9
= (5/9 x 5/11) + ( 4/9 x 5/11 )
= 25/99 + 20/99
= 45/99 = 5/11
nhớ tick cho mình nha
1) \(=\left(\frac{3}{5}+\frac{2}{5}\right).\frac{6}{11}\)
\(=1.\frac{6}{11}\)
\(=\frac{6}{11}\)
2)\(\frac{17}{25}.\left(\frac{11}{19}+\frac{6}{19}+\frac{2}{19}\right)\)
\(=\frac{17}{25}.1\)
\(=\frac{17}{25}\)
\(405:27\times516=15\times516=7740\)
\(\dfrac{6}{7}+\dfrac{2}{3}\times\dfrac{5}{4}=\dfrac{6}{7}+\dfrac{5}{6}=\dfrac{71}{42}\)
\(\dfrac{9}{5}-\dfrac{6}{7}:\dfrac{11}{7}=\dfrac{9}{5}-\dfrac{6}{11}=\dfrac{69}{55}\)
a \(\dfrac{6}{15}+\dfrac{11}{15}=\dfrac{17}{15}\)
b \(\dfrac{22}{77}-\dfrac{14}{77}=\dfrac{8}{77}\)
c \(\dfrac{11}{13}\times\dfrac{26}{31}=11\times\dfrac{2}{31}=\dfrac{22}{31}\)
d \(\dfrac{1}{2}\times3\times\dfrac{2}{5}=\dfrac{3}{5}\)
\(x\) : 234 = 405 (dư 123)
\(x\) = 405 x 234 + 123
\(x\) = 94 770 + 123
\(x\) = 94 893
X : 234 = 405 ( dư 123 )
( X - 123 ) : 234 = 405
X - 123 = 405 x 234
X - 123 = 94 770
X = 94 770 + 123
X = 94 893
Vậy X = 94 893
`x : 11 - 237=405`
`=> x : 11=405+237`
`=> x : 11=642`
`=>x= 642 xx 11`
`=>x= 7062`
`x:11-237=405`
`=>x:11=405+237`
`=>x:11=642`
`=>x=642xx11`
`=>x=7062`