\(\frac{9\cdot6-9\cdot2}{18}\)
\(=\frac{9\left(6-2\right)}{18}\)
\(=\frac{9\cdot4}{18}\)
\(=\frac{36}{18}\)
\(=2\)
\(\frac{9.6-9.2}{18}\)
\(=\frac{9.\left(6-2\right)}{18}\)
\(=\frac{9.4}{18}\)
\(=\frac{36}{12}\Leftrightarrow2\)
Chúc bạn học tốt !
9 x 6 - 9 x 2 / 18
= 9 x ( 6 - 2) / 18
= 9 x 4 / 18
= 9 x 4 / 9 x 2
= 4 /2 = 2 / 1 = 2