Question

[binn2011]

Rút gọn phân số 

a, 3. 7 - 3 . 5/ 6 + 12

b, 9 . 6 - 9 . 3 / 27

Answer 1

[sakura]

a, \(\frac{3.7-3.5}{5+12}=\frac{3.\left(7-5\right)}{17}\)

                         \(=\frac{3.2}{17}\)

                          \(=\frac{6}{17}\)

b, \(\frac{9.6-9.3}{27}=\frac{9.\left(6-3\right)}{27}\)

                        \(=\frac{9.3}{27}\)

                         \(=\frac{27}{27}=1\)

nha

Answer 2

[NNH]

\(\frac{3.7-3.5}{6+12}\)=\(\frac{3.\left(7-5\right)}{3.\left(2+4\right)}\)=\(\frac{2}{6}\)=\(\frac{1}{2}\)

\(\frac{9.6-9.3}{27}=\)\(\frac{9.3}{9.3}\)=1