\(\frac{5}{7}+\frac{1}{5}=\)giup mik nha
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(\frac{5}{12}-\frac{7}{32}:\frac{21}{16}=\frac{5}{12}-\frac{7}{32}\times\frac{16}{21}=\frac{5}{12}-\frac{112}{672}=\frac{5}{12}-\frac{2}{12}=\frac{3}{12}=\frac{1}{4}\)
\(\frac{5}{12}-\frac{7}{32}:\frac{21}{16}\)
= \(\frac{5}{12}-\frac{1}{6}\)
= \(\frac{1}{4}\)
\(2-\left(5\frac{3}{8}+x-7\frac{5}{24}\right)\)\(:16\frac{2}{3}=0\)
\(\Rightarrow\)\(2-\left(5\frac{3}{8}+x-7\frac{5}{24}\right)=0\)
\(\Rightarrow\)\(5\frac{3}{8}+x-7\frac{5}{24}=2\)
\(\Rightarrow5\frac{3}{8}+x=9\frac{5}{24}\)
\(\Rightarrow x=3\frac{5}{6}\)
( Cách làm thì đúng rồi nhưng đáp án tớ ko chắc chắn )
Bài 1 : \(\frac{1}{3}+\frac{3}{8}-\frac{7}{12}\) = \(\frac{1}{8}\)= 0,125
\(\frac{1}{3}\) +\(\frac{3}{8}\) -\(\frac{7}{12}\) =\(\frac{1}{8}\) \(\frac{-3}{14}\) +\(\frac{5}{8}\)-\(\frac{1}{2}\) =\(\frac{-5}{56}\)
\(A=\frac{35}{42}+\frac{1}{12}+\frac{8}{12}+\frac{12}{42}+\frac{1}{25}+\frac{3}{12}-\frac{5}{42}\)
\(A=\left(\frac{35}{42}+\frac{12}{42}-\frac{5}{42}\right)+\left(\frac{1}{12}+\frac{8}{12}+\frac{3}{12}\right)+\frac{1}{25}\)
\(A=1+1+\frac{1}{25}\)
\(A=2+\frac{1}{25}\)
\(A=\frac{51}{25}\)
a) \(\frac{-2^2}{3}.x=\frac{-2^5}{3}\)
\(x=\frac{-2^5}{3}:\frac{-2^2}{3}\)
\(x=\frac{-2^5}{3}.\frac{-3}{2^2}\)
\(x=\frac{2^3}{1}\)
\(x=2^3\)
\(x=8\)
Vậy x = 8
b)\(\frac{-1^3}{3}.x=\frac{1}{81}\)
\(x=\frac{1}{81}:\frac{-1^3}{3}\)
\(x=\frac{1}{81}.\frac{-3}{1^3}\)
\(x=\frac{1}{3^4}.\frac{-3}{1^3}\)
\(x=\frac{1}{3^3}.\frac{-1}{1^2}\)
\(x=\frac{-1}{3^3}\)
\(x=\frac{-1}{27}\)
Vậy \(x=\frac{-1}{27}\)