a. 255/180 ; 310/180 ; 96/180
Chúc bạn hok tốt
a, \(\frac{-17}{12}=\frac{-255}{180}\); \(\frac{31}{18}=\frac{310}{180}\);\(\frac{8}{15}=\frac{96}{180}\)
b, \(\frac{9.6-9.2}{18.5}=\frac{54-18}{90}=\frac{36}{90}=\frac{6}{15}\)
\(\frac{13.2-13.3}{\left(1-14\right).9}=\frac{26-39}{-13.9}=\frac{-13}{-117}=\frac{1}{9}\)
Quy đồng mẫu số \(\frac{6}{15}\)và \(\frac{1}{9}\):
\(\frac{6}{15}=\frac{18}{45}\)
\(\frac{1}{9}=\frac{5}{45}\)
\(.\)