a) 6,(3) : (-38) = 57/9 : (- 38) = - 19/3 × 1/38 = - 1/3 × 1/2 = - 1/6
b) - 1 3/4 : (- 4 2/3) = - 7/4 : ( - 14/3) = 7/4 × 3/14 = 1/4 × 3/2 = 3/8
c) 4√2 : 2 = 2√2
d) 20√3 : (- 4) = - 5√3
e) - 0,5√5 : 5 = - 1/2 × √5 : 5 = - 1/2 × √5/5 = - √5/10
