Resposta :
a)-9/10
b)3/10
c)-21/5
d)9/48
Explicação:
a)(2/3)÷(-3/5) =
(3/2)×(-3/5) =
3×(-3)/2×5 =
-9/10
b)(-2/3)÷(-1/5) =
(-3/2)×(-1/5) =
3×1/2×5 =
3/10
c)(1/7)÷(-3/5) =
(7/1)×(-3/5) =
7×3/1×5 =
-21/5
d)(-8/3)÷(-3/6) =
(-3/8)×(-3/6) =
3×3/8×6 =
9/48