Question

8-(3+5-20)+(3-10) ''''''20-(-6+8)-(-1+3)''''''+5+2.(+4)+12''''''-15-6-10.(2)''''''''+23+5.(3)+2.(2)

Answer 1

Olá, Paulo!.

a)

$8-(3+5-20)+(3-10) \\ 8- (8-20) + (-7) \\ 8- (- 12) - 7 \\ 8 +12 -7 \\ 8+5= 13$

b)

$20-(-6+8)-(-1+3) \\ 20-(2)-(2) \\ 20 - 2 - 2 \\ = 16$

c)

$5+2.(+4)+12 \\ 5 + 8 + 12 \\ = 25$

d)

$-15-6-10.(2) \\ - 21 - 20 \\ = - 41$

e)

$+23+5.(3)+2.(2) \\ 23 + 15 + 4 \\ = 42$

Answer 2

Resposta:

Explicação passo a passo:

A)

= 8-(3+5-20)+(3-10)

= 8 - (8-20)+(-7)

= 8 - (-12) - 7

= 8+12-7

= 8+5

= 13

= 20-(-6+8)-(-1+3)

= 20 - (2) - (2)

= 20 - 2 - 2

= 16

= +5+2.(+4)+12

= 5+8+12

= 5+20

= 25

= -15-6-10.(2)

= - 21 - 20

= - 41

= +23+5.(3)+2.(2)

= 23 + 15 + 4

= 38 + 4

= 42