递等式计算(怎么简便怎么算)。(1)3/11x2/7x7x1/2，(2)0.7x3/8+0.3x3

3/11x2/7x7x1/2 =3/11x2x1/2 =3/11x1 =3/11 0.7x3/8+0.3x3/8 =3/8x(0.7+0.3) =3/8x1 =3/8 3/4x5/6+1/6÷4/3 =3/4x5/6+1/6+3/4 =3/4x(5/6+1/6) =3/4x1 =3