Question

а -(9 3/50 - 5 7/25) при а = 7 1/2;​

Answer 1

а - ($9\frac{3}{50} - 5\frac{7}{25}$) (а= $7\frac{1}{2}$)

$9\frac{3}{50}$ = 9*50+3 = $\frac{453}{50}$

$5\frac{7}{25}$ = 5*25+7 = $\frac{132}{25}$

$\frac{453}{50} - \frac{132}{25} = \frac{453-264}{50} = \frac{189}{50}$ = $3\frac{39}{50}$

$7\frac{1}{2}$  = $\frac{15}{2}$

= $3\frac{36}{50}$

$\frac{15}{2} - \frac{189}{50} = \frac{375-189}{50} = \frac{186}{50}$