TL
\(\frac{7}{8}\)+\(\frac{4}{23}\)+\(\frac{42}{23}\)=\(\frac{7}{8}+2\)=\(\frac{23}{8}\)
nha bn
HT
\(TL:\)
\(\frac{7}{8}+\frac{4}{23}+\frac{42}{23}\)
\(=\frac{7}{8}+\left(\frac{4}{23}+\frac{42}{23}\right)\)
\(=\frac{7}{8}+\frac{46}{23}\)
\(=\frac{7}{8}+2\)
\(=\frac{7}{8}+\frac{16}{8}\)
\(=\frac{23}{8}\)
\(=2\frac{7}{8}\)
\(HT!\)