Question

1)
a) (+5/7)-(+2/9)=
b) (-4/5)-(3/7)=

2)
a) (-3/7)x(-2/5)=
b) (+6/5)x(+2/9)=
c) (+1/3)x(-11/8)=
d) (+2/7)x(-1/5)x(-5/2)=

3)
a) 4x2,3=
b) 2,7x1,5=
c) 6,31x2,34=
d) 5,32x3,214=

Answer 1

Resposta:

EU semi so a 1) a) b)

A) =2,8

B)=8, 2