Question

$- 3 + 5 - 7 =$

$8 - 12 + 3.4$


$7.8 - 3 + 4 - 5$

$3 {}^{2} - 5.( - 3) {}^{2} - 3 + 4$
alguém aiiiiii​

Answer 1

• - 3 + 5 - 7 = - 10 + 5 = - 5

• 8 - 12 + 3.4 = 8 - 12 + 12 = -12 + 20 = 7

• 7.8 - 3 + 4 - 5 = 56 - 3 + 4 - 5 = 60 - 3 = 57

• 3² - 5.(-3)² - 3 + 4 = 9 -5.9 - 3 + 4 = 9 - 45 - 3 + 4 = 13 - 48 = -35