Question

calcule os números a seguir?

a) 2,6+3,48-5x(6,7-8,1)=
b)(3,6)²-5x3,62-4,48;2=

Answer 1

$a)2.6 + 3.48 - 5 \times (6.7 - 8.1) = \\ = 6.08 - 5 \times ( - 1.4) = 6.08 - 7 = \\ = - 0.92$

$b) {(3.6)}^{2} - 5 \times 3.62 - 4.48 \div 2 = \\ = 12.96 - 18.1 - 2.21 = \\ = - 5.14 - 2.21 = - 7.35$