Question

Answer 1

\(N=\frac{15}{8}+1,2\left(31\right)-0,\left(13\right)\)

\(=\frac{15}{8}+1,2+0,0\left(31\right)-\frac{13}{99}=\frac{15}{8}+\frac65+\frac{31}{990}-\frac{130}{990}\)

\(=\frac{75}{40}+\frac{48}{40}-\frac{99}{990}=\frac{123}{40}-\frac{1}{10}=\frac{119}{40}\)

=>Tử số là 119, mẫu số là 40