Question

7phan 19 * 1phan 3 +7 phan 19 * 2phan 3

Answer 1

viết rõ ra nhé

Answer 2

\(\frac{7}{19}.\frac{1}{3}+\frac{7}{19}.\frac{2}{3}\)

\(=\frac{7}{19}.\left(\frac{1}{3}+\frac{2}{3}\right)\)

\(=\frac{7}{19}.\frac{3}{3}\)

\(=\frac{7}{19}.1\)

\(=\frac{7}{19}\)