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\(\frac{2}{3}\cdot x:\frac{1}{5}=1\frac{1}{3}:\frac{1}{4}\)
\(\Leftrightarrow\frac{2}{3}\cdot x:\frac{1}{5}=\frac{16}{3}\)
\(\Rightarrow\frac{2}{3}\cdot x=\frac{16}{3}\cdot\frac{1}{5}\)
\(\Rightarrow x=\frac{16}{15}:\frac{2}{3}\)
\(\Rightarrow x=\frac{8}{5}\)
\(\frac{3}{4}\)x 8,4 + 2,8 x \(1\frac{1}{2}\)
= 0,75 x 8,4 + 2,8 x \(\frac{3}{2}\)
= 0,75 x 8,4 + 2,8 x 1,5
= 6,3 + 4,2
= 10,5
\(\frac{3}{4}\times8,4+2,8\times1\frac{1}{2}\)
\(=6,3+4,2\)
\(=10,5\)
Kết bạn với mình nha!
= \(\frac{4}{3}\)+ \(\frac{6}{5}\)x y - \(\frac{4}{5}\)= \(\frac{14}{5}\)
= \(\frac{8}{15}\)+ \(\frac{6}{5}\)x y = \(\frac{14}{5}\)
\(\frac{6}{5}\)x y = \(\frac{14}{5}\)- \(\frac{8}{15}\)= \(\frac{6}{15}\)
y = \(\frac{6}{15}\): \(\frac{6}{5}\)
y = \(\frac{1}{3}\)
Ta có \(x.\frac{7}{8}-x.\frac{3}{4}=\frac{2}{3}\)
\(\Rightarrow x.\left(\frac{7}{8}-\frac{3}{4}\right)=\frac{2}{3}\)
\(\Rightarrow x.\frac{1}{8}=\frac{2}{3}\)
\(\Rightarrow x=\frac{2}{3}.8\)
\(\Rightarrow x=\frac{16}{3}\)
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 \(x=-\frac{5}{9}\)
\(\frac{5}{6}\times\frac{7}{12}+\frac{5}{12}\times\frac{5}{6}+\frac{1}{6}\)
= \(\frac{35}{72}+\frac{25}{36}+\frac{1}{6}\)
= \(\frac{97}{72}\)
\(\left(\frac{8}{15}\times\frac{3}{4}\times\frac{5}{4}\right):\frac{7}{8}\)
= \(\frac{1}{2}:\frac{7}{8}\)
=\(\frac{4}{7}\)
HOK TỐT ^^