Question

Ι-3Ι-Ι-1/2Ι=
Ι-5/8Ι*Ι-4/5Ι=
Ι-4,8Ι/Ι-3/10Ι=
Ι-1/6Ι+Ι-7/10Ι=

Answer 1

/-5/8/*/4/5/=1/2
/-3/-/-1/2/=2 1/2
/-4,8/:/-3/10/=16
/-1/6/+/-7/10/=13/15