Question

\(1\frac{5}{18}\)\(-\frac{5}{18}\)\(.\left(\frac{1}{15}+1\frac{1}{12}\right)\)

 

Answer 1

\(1\frac{5}{18}-\frac{5}{18}.\left(\frac{1}{15}+1\frac{1}{12}\right)\)

\(=1\frac{5}{18}-\frac{5}{18}.\left(\frac{1}{15}+\frac{13}{12}\right)\)

\(=1\frac{5}{18}-\frac{5}{18}.\left(\frac{4}{60}+\frac{65}{60}\right)\)

\(=1\frac{5}{18}-\frac{5}{18}.\frac{69}{60}\)

\(=\frac{23}{18}-\frac{23}{72}\)

\(=\frac{92}{72}-\frac{23}{72}\)

\(=\frac{69}{72}\)

\(=\frac{23}{24}\)

Tham khảo nha !!! Học tốt !!!! 

Answer 2

cảm ơn nha

Answer 3

\(1\frac{5}{18}-\frac{5}{18}\cdot\left(\frac{1}{15}+1\frac{1}{12}\right)=\frac{23}{18}-\frac{5}{18}\cdot\left(\frac{1}{15}+\frac{13}{12}\right)=\frac{23}{18}-\frac{5}{18}\cdot\frac{23}{20}=\frac{23}{18}-\frac{23}{72}\)

\(=\frac{23}{24}\)