Question

PERGUNTA URGENTE!!!
por favor, preciso da resposta destas expressões numéricas:

27 : ( 2 elevado a 2 + 5 ) - ( 7- 6 ) elevado a 2

( 4 + 2 X 1,5 ) elevado a dois X 2

1, 25 X ( 2,2 + 1,8 ) - 3,8

(0,3) elevado a dois X 10 elevado a 3

Answer 1

27/(2² + 5) - (7 - 6)²
= 27/(4 + 5) - 1²
= 27/9 - 1
= 3 - 1 
= 2

(4 + 2 x 1,5)² x 2
= (4 + 3)² x 2
= 7² x 2
= 49 x 2
= 98

1,25 x (2,2 + 1,8) - 3,8
= 1,25 x 4 - 3,8
= 5 - 3,8
= 1,2

(0,3)² x 10³
= 0,09 x 1 000
= 90

Answer 2

$27:(2^2+5)-(7-6)^2\to~~ 27:(4+5)-(1)^2\to~~ 27:9-1\to\\\\3-1\to~~ \large\boxed{2}\\\\\\\\ (4+2\times 1,5)^2 \times 2\to~~ (4+3)^2 \times 2\to~~7^2\times 2\to~~ 49\times2\to~~ \large\boxed{98}\\\\\\\\ 1,25\times(2,2+1,8)-3,8\to~~ 1,25\times 4-3,8\to~~5-3,8\to~~\large\boxed{1,2}\\\\\\\\ (0,3)^2\times10^3\to~~0,09\times 1000\to~~\large\boxed{90}$