Question

Resolva as expressões numéricas a seguir : a) -42+(3-5)×(-2)2+32-(-2)4 b) -{5-10-[7-6+(8-11)-(2-3)-3]+1-5}+2 C)2÷3+5÷3-1÷3 D)3÷4+2÷3-1÷3+2÷5

Answer 1

A)-42+(3-5)X(-2)x2+32-(-2)x4
-10+(3-5)x(-2)x2+2x4
-10+(3-5)x(-2)x2+8
-2+(3-5)x(-2)x2
-2(1+(3-5)x2)
-2(1-2x2)
-2(1-4x),,

B)-(5-10)-(7-6+(8-11)-(2-3)-3)+1-5+1
-(-5)-(7-6+(8-11)-(2-3)-3)+1-5+2
5-(7-6+(8-11)-(2-3)-3)+1-5+2
-(7-6+(-3)-(-1)-3)+1+2
-(7-6-3+1-2)+1+2
-(-4)+1+2
4+1+2
7,,

C)2÷3+5÷3-1÷3
$\frac{2}{3} + \frac{5}{3 } + \frac{1}{3} = 2$
D)3÷4+2÷3-1÷3+2÷5
$0.75 + \frac{2}{3} - \frac{1}{3} + 0.4$
$\frac{3}{4} + \frac{2}{3} - \frac{1}{3} + \frac{2}{5}$
$1 \frac{29}{60} = 1.48333$

Espero ter ajudado :)