Question

Tính nhanh nếu có thể

a, -12/5 . (-7/6 + 10/3 - 5/4)

 

Answer 1

\(-\frac{12}{5}.\left(-\frac{7}{6}+\frac{10}{3}-\frac{5}{4}\right)=-\frac{11}{5}\)

Answer 2

\(\frac{-12}{5}.\left(\frac{-7}{6}+\frac{10}{3}-\frac{5}{4}\right)\)

\(=\frac{-12}{5}.\left(\frac{-14}{12}+\frac{40}{12}-\frac{15}{12}\right)\)

\(=\frac{-12}{5}.\frac{11}{12}\)  

 \(=\frac{-11}{5}\) 

^^  Học tốt!