Question

найдите значение выражения : (-1/7 + 1 2/3) * 131.25

Answer 1

$(-frac{1}{7}+1frac{2}{3})*131,25 =200$

 

1) $-frac{1}{7}+1frac{2}{3}=-frac{1}{7}+frac{5}{3}=frac{5}{3}-frac{1}{7}=frac{35-3}{21}=frac{32}{21}=1frac{11}{21}$

 

2) $1frac{11}{21}*131,25=frac{32}{21}*131,25=frac{4200}{21}=200$