Question

16*17-5

gach ngang 

16*16+11

45*17-17

gạch ngang

73+45*15

Answer 1

\(\frac{16×17-5}{16×16+11}\)

\(=\frac{17-5}{16+11}\)

\(=\frac{12}{27}\)

Answer 2

1, \(\frac{16x17-5}{16x16+11}\)
\(=\frac{272-5}{256+11}\)
\(=\frac{267}{267}=1\)
2, \(\frac{45x17-17}{73+45x15}\)
\(=\frac{17x\left(45-1\right)}{73+675}\)
\(=\frac{17x44}{748}\)
\(=\frac{748}{748}=1\)