Question

Calculati:
a) 1,3 + 7,(1);
b) 2supra5 + 1,5(5);

Answer 1

a) 1,3 + 7,(1) =
= 13/10+(71-7)/9=
= 13/10+64/9=
=(117+640)/90=
=757/90=
=8,4(1)

b) 2/5 + 1,5(5) =
= 2/5 + (155-15)90 =
=2/5+140/90=
=2/5+14/9=
=(18+70)/45=
=88/45=
=1,9(5)