Question

80-5. (28-6.4)+6-3.4=

Answer 1

80-5*(28-6*4)+6-3*4
80-5*(28-24)+6-12
80-5*4+6-12
80-20+6-12
60+6-12
66-12
54

Answer 2

Boa Tarde!

►80-5. (28-6.4)+6-3.4=
80-5. (28-24)+6-12=
80-5.4-6=
80-20-6=
80-26=
$\boxed{\boxed{54}}$