Đúng ghi đ, sai ghi s
Đúng ghi đ, sai ghi s
16/36 : 4/9 = 16/36 x 4/9 = 16 x 4 / 36 x 9 = 16/81
49/72 : 14/45 = 49/72 x 45/14 = 49 x 45 / 72 x 14 = 35/16
5/36 x 27/25 = 5 x 27 / 36 x 25 = 3/20
7/18 x 9/14 = 7x9/18x14 = 54/252
16/36 : 4/9 = 16/36 x 4/9 = 16 x 4 / 36 x 9 = 16/81
49/72 : 14/45 = 49/72 x 45/14 = 49 x 45 / 72 x 14 = 35/16
5/36 x 27/25 = 5 x 27 / 36 x 25 = 3/20
7/18 x 9/14 = 7x9/18x14 = 54/252