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2,5 x 7 = 17,5
4,18 x 5 = 20,9
0,256 x 8 = 2,048
6,8 x 15 = 102
3,18 x 3 = 9,54
8,07 x 5 = 40,35
2,389 x 10 = 23,89
42,6 x 4 = 170,4
\(\left(y-\frac{2}{5}\right):\frac{4}{3}=\frac{3}{8}\)
\(y-\frac{2}{5}=\frac{3}{8}.\frac{4}{3}\)
\(y-\frac{2}{5}=\frac{1}{2}\)
\(y=\frac{1}{2}+\frac{2}{5}\)
\(\Rightarrow y=\frac{9}{10}\)
\(y.\frac{5}{6}=\frac{1}{4}+\frac{1}{3}\)
\(y.\frac{5}{6}=\frac{7}{12}\)
\(y=\frac{7}{12}:\frac{5}{6}\)
\(y=\frac{7}{12}.\frac{6}{5}\)
\(\Rightarrow y=\frac{7}{10}\)
a ) \(\left(y-\frac{2}{5}\right):\frac{4}{3}=\frac{3}{8}\)
\(\left(y-\frac{2}{5}\right)=\frac{3}{8}\times\frac{4}{3}\)
\(y-\frac{2}{5}=\frac{1}{2}\)
\(y=\frac{1}{2}+\frac{2}{5}\)
\(y=\frac{5}{10}+\frac{4}{10}\)
\(y=\frac{9}{10}\)
Vậy \(y=\frac{9}{10}\)
b ) \(y\times\frac{5}{6}=\frac{1}{4}+\frac{1}{3}\)
\(y\times\frac{5}{6}=\frac{3}{12}+\frac{4}{12}\)
\(y\times\frac{5}{6}=\frac{7}{12}\)
\(y=\frac{7}{12}:\frac{5}{6}\)
\(y=\frac{7}{12}\times\frac{6}{5}\)
\(y=\frac{7}{10}\)
Vậy \(y=\frac{7}{10}\)
Chúc bạn học tốt !!!
x * 2 . 7 = 8.01 * 5.4
x * 2.7 = 43.254
x= 43.254 : 2.7
x=16.02
\(x\times3,12-x=3,18\)
\(3,12x-x=3,18\)
\(2,12x=3,18\)
\(x=3,18\div2,12\)
\(x=1,5\)
\(\left(x-\frac{1}{4}\right)\div\frac{4}{3}=\frac{1}{2}\)
\(\Leftrightarrow x-\frac{1}{4}=\frac{1}{2}\times\frac{4}{3}\)
\(\Leftrightarrow x-\frac{1}{4}=\frac{4}{6}\)
\(\Leftrightarrow x-\frac{3}{12}=\frac{8}{12}\)
\(\Leftrightarrow x=\frac{8}{12}+\frac{3}{12}\)
\(\Leftrightarrow x=\frac{11}{12}\)
\(\left(X-\frac{1}{4}\right):\frac{4}{3}=\frac{1}{2}\)
\(\Rightarrow X-\frac{1}{4}=\frac{1}{2}.\frac{4}{3}\)
\(\Rightarrow X-\frac{1}{4}=\frac{2}{3}\)
\(\Rightarrow X=\frac{2}{3}+\frac{1}{4}\)
\(\Rightarrow X=\frac{11}{12}\)
x+3,18=10
x=10-3,18
x=6,82
Vậy x=6,82
x+3,18=2,5*4
=>x+3,18=10
=>x=10-3,18
=>x=6,82
Chúc bạn học giỏi