Question

(0,2)2+(0,8)2=
(1,5)2-(0,3)2=
1-(0,9)2=
100x(0,1)4=
(Esses números depois das contas são potencias)

Answer 1

1
$0.2 \times 0.2 = 0.04 \\ 0.8 \times 0.8 = 0.64 \\ 0.04 + 0.64 =0.68$
2$1.5 \times 1.5 =2.25 \\ 0.3 \times 0.3 = 0.09 \\ 2.25 - 0.09 = 2.16$
$0.9 \times 0.9 = 0.81 \\ 1 - 0.81 = 0.19$
3

4
$0.1 \times 0.1 \times 0.1 \times 0.1 = 0.0001 \\ 100 \times 0.0001 = 0.01$