\(-\frac{7}{90}=-\frac{28}{360}\)
\(\frac{5}{72}=\frac{25}{360}\)
mẫu chung là 360 đó bn
=>\(\frac{-7}{90}=\frac{-7.4}{90.4}=\frac{-28}{360};\frac{5}{72}=\frac{5.5}{72.5}=\frac{25}{360}\)
\(\frac{-7}{90}=\frac{7x4}{90x4}=\frac{-28}{360}\)
\(\frac{5}{72}=\frac{5x5}{72x5}=\frac{25}{360}\)
123dddddddddddddddddđfffffffffffffffffffffffffffffffffffffff00000000000000000000000000000000000000000000999999999999999999999999999999999999999999
11111111111111111111111111111111111111111111111111111111111111111111111111111111122222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222
Tui làm trước mà sao lại l i ke cho khong can biet nhàm quá
MSC: 360
7/90=7*4/90*4=28/360
5/72=5*5/72*5=25/360
các bạn