Question

resolva as seguintes expressões
A) 14-(-10+5+3)
B)-15+[-4-(-5+20)]
C)20-{-10+[+20-(-20+10)]}
D)-12+(-6)-(-8-5).5​

Answer 1

Olá!

A)

$14-\left(-10+5+3\right)\\\\=14-\left(-2\right)\\\\=16$

B)

$-15+\left[-4-\left(-5+20\right)\right]\\\\=-15-19\\\\=-34$

C)

$20-\left(-10\right)+\left(20-\left(-20+10\right)\right)\\\\=20+10+20-\left(-20+10\right)\\\\=20+10+20+10\\\\=60$

D)

$-12+\left(-6\right)-\left(-8-5\right)\cdot \:0.5\\\\=-12-6-\left(-8-5\right)\cdot \:0.5\\\\=-12-6-\left(-6.5\right)\\\\=-12-6+6.5\\\\=-11.5$

Espero ter ajudado!