Tìm x:

\(0,\left(12\right):\left(x-1\right)=1,\left(6\right):0,\left(4\right)\)

\(0,\left(17\right):2,\left(3\right)=x:0,\left(3\right)\)

\(\dfrac{0,1\left(6\right)+0,\left(3\right)}{0,\left(3\right)+1,1\left(6\right)}\cdot x=0,\left(2\right)\)

Tính     \(M=\)\(\dfrac{0,1\left(6\right)+0,\left(3\right)}{0,\left(3\right)+1,1\left(6\right)}\)

Chứng minh:      \(0,\left(12\right)+0,\left(87\right)=1\)

Tính:

\(A=0,\left(36\right)-0,\left(71\right)\)

\(B=\left[3,\left(12\right)-2,\left(5\right)\right]:0,\left(14\right)\)