(2 X3 5 X2  2 X  3)

5) - File thứ 11: de_cuong_toan_8_232201911
Toán File thứ 11: de_cuong_toan_8_232201911

5) (2 x

3

 5 x

2

 2 x  3) : (2 x

2

x  1) 6) (2 x

3

 5 x

2

 6 x  15) : (2 x  5)