Question

(-18+13):(2 1/7+1 1/2):[-0,1(5)]

Answer 1

(-18+13):(2 1/7+1 1/2):[-0,1(5)]=

2 si 1/7=(2×7+1)/7=15/7   si 1  si 1/2=(1×2+1)/2=3/2

-0,1(5)=(15-1)/90=14/90=7/45

(-18+13):(15/7+3/2):(-7/45)=

-5:[(15·2+3·7)/)2·7)]:-7/45=

-5:51:14:-7/45=

-5·14/51·-45/7=(5·14·45):(7·51)= 450/51 = 8  intregi si 42/50

Answer 2

(-18+13):(2 1/7+1 1/2):[-0,1(5)] =

(-5):(15/7+3/2):(-14/90) =

(-5):(30+21)/14 x (-45/7) = (-5)x(14/51)x(-45/7) =

(-70/51)x(-45/7) = (-70x-45)/(51x7) = 3150/357 = 450/51 = 8 42/51