\(\frac{1}{2}+\frac{1}{4}+\frac{1}{8}\)

\(=\frac{4}{8}+\frac{2}{8}+\frac{1}{8}\)

\(=\frac{4+2+1}{8}\)

\(=\frac{7}{8}\)

1/2 + 1/4 + 1/8

= 4/8 + 2/8 + 1/8

=6/8 + 1/8

= 7/8

\(\frac{16\times8-16\times2}{12\times4}\)

\(=\frac{16\times\left(8-2\right)}{12\times4}\)

\(=\frac{16\times6}{12\times4}\)

\(=2\)

#H

\(\frac{14}{15}:\frac{7}{5}\)

\(=\frac{14\times5}{15\times7}\)

\(=\frac{2}{3}\)

#H

cảm ơn bạn để mình tíc cho

\(\frac{16\times8-16\times2}{12\times4}\)

\(=\frac{16\times\left(8-2\right)}{12\times4}\)

\(=\frac{16\times6}{12\times4}\)

\(=\frac{4\times4\times6}{2\times6\times4}\)

\(=\frac{4}{2}=2\)

\(\frac{x-1}{5}+\frac{1}{4}=\frac{1}{2}\)

\(\frac{x-1}{5}=\frac{1}{4}\)

\(\Rightarrow\)\(4\left(x-1\right)=5\)

\(\Rightarrow\)\(x-1=\frac{5}{4}\)

\(\Rightarrow\)\(x=\frac{9}{4}\)

Vậy \(x=\frac{9}{4}\)

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7/24+13/24

= 20/24

=    5/6

\(\frac{7}{24}+\frac{13}{24}\)

\(=\frac{7+13}{24}\)

\(=\frac{20}{24}\)

\(=\frac{5}{6}\)

làm hộ mình nhe

\(\frac{12.4+12.6}{24}\)

\(\Leftrightarrow\frac{12.\left(4+6\right)}{24}\)

\(\Leftrightarrow\frac{12.10}{24}\)

\(\Leftrightarrow5\)

\(.\)là dấu nhân nhé .