Viết lại hộ mik cái

Ko nhìn đc bn ui!@##

bạn viết gì vậy

ta có \(\frac{1}{13}+\frac{16}{7}+\frac{3}{105}-\frac{9}{7}-\left(-\frac{12}{13}\right)\)

            \(=\left[\frac{1}{13}-\left(-\frac{12}{13}\right)\right]+\left(\frac{16}{7}-\frac{9}{7}\right)+\frac{3}{105}\)

            \(=1+1+\frac{3}{105}\)

           \(=2+\frac{3}{105}=2\frac{3}{105}\)

nhìn rối thế

a) \(\frac{7}{15}+\frac{9}{10}+\frac{8}{15}-\frac{-1}{10}-\frac{20}{10}+\frac{1}{157}\)

\(=\frac{7}{15}+\frac{9}{10}+\frac{8}{15}+\frac{1}{10}-\frac{20}{10}+\frac{1}{157}\)

\(=\left(\frac{7}{15}+\frac{8}{15}\right)+\left(\frac{9}{10}+\frac{1}{10}\right)-2+\frac{1}{157}\)

\(=1+1-2+\frac{1}{157}\)

\(=2-2+\frac{1}{157}\)

\(=0+\frac{1}{157}=\frac{1}{157}\)

b) \(\frac{1}{13}+\frac{16}{7}+\frac{3}{105}-\frac{9}{7}-\frac{-12}{13}\)

\(=\frac{1}{13}+\frac{16}{7}+\frac{1}{35}-\frac{9}{7}+\frac{12}{13}\)

\(=\left(\frac{1}{13}+\frac{12}{13}\right)+\left(\frac{16}{7}-\frac{9}{7}\right)+\frac{1}{35}\)

\(=1+1+\frac{1}{35}\)

\(=2+\frac{1}{35}\)

\(=\frac{70}{35}+\frac{1}{35}=\frac{71}{35}\)

\(\frac{210}{207}+\frac{105}{113}-\frac{3}{207}+\frac{8}{113}+27\)

\(=\left(\frac{210}{207}-\frac{3}{207}\right)+\left(\frac{105}{113}+\frac{8}{113}\right)+27\)

\(=1+1+27\)

\(=29\)

\(\frac{210}{207}+\frac{105}{113}-\frac{3}{207}+\frac{8}{113}+27\)

\(=\left(\frac{210}{207}-\frac{3}{2017}\right)+\left(\frac{105}{113}+\frac{8}{113}\right)+27\)

\(=\frac{207}{207}+\frac{113}{113}+27\)

\(=1+1+27\)

\(=29\)