Question

Determine o valor das expressões numéricas: A= 2/3-4/5+1/4 B= 1/3+3/7-5

Answer 1

a)2/3-4/5+1/4=
40/60-48/60+15/60=
-8/60+15/60=
7/60

b)1/3+3/7-5=

7/21+9/21-105/21=
16/21-105/21=
-89/21