Question

найдите значение выражения (-1/7+1 2/3)*131,25

Answer 1

$(- frac{1}{7} +1 frac{2}{3} )*131.25=200 \ 1) -frac{1}{7} +1 frac{2}{3} =- frac{3}{21} +1 frac{14}{21} =1 frac{14}{21} - frac{3}{21} =1 frac{11}{21} \ \ 2)1 frac{11}{21} *131 frac{25}{100} =1 frac{11}{21} *131 frac{1}{4} = frac{32}{21} * frac{525}{4} = frac{32*525}{21*4} = \ = frac{8*25}{1*1} =200$