(4(2/7)÷3(3/14)-8+4(6/11))×3=-70/11=-6(4/11)
1) 4(2/7)÷3(3/14)=(30/7)÷(45/14)=(5×3×2×7×2)/(7×3×3×5)=(4/3)
2) (4/3)-8=(4-24)/3=-(20/3)
3) -(20/3)+4(6/11)=-(20/3)+(50/11)=((-20)×11+50×3)/33=(-220+150)/33=-(70/33)
4) -(70/33)×3=-(70/11)=-6(4/11)
9,8÷(10-3(7/15))×1(1/27)=14/9=1(5/9)
1) 10-3(7/15)=10-(52/15)=(10×15-52)/15=(150-52)/15=98/15
2) 9,8÷(98/15)=(98/10)÷(98/15)=(98×5×3)/(5×2×98)=(3/2)
3) (3/2)×1(1/27)=(3/2)×(28/27)=(3×14×2)/(2×3×9)=14/9=1(5/9)