Question

1 ) ( -12 ) - ( + 3 ) - ( - 20 ) =
2 ) ( - 5 ) + ( - 8 ) - ( +5 ) =
3 ) ( - 4 ) - ( - 8 ) - ( -5 ) =
4 ) - ( -10 - ( - 20 ) + ( - 30 ) =
5 ) 2 + ( 2 + 5 -7 ) =
¨6 ) -5 + ( 2-4 ) - ( 7-1 ) =
7 ) - ( 2-3- ) - ( -9 ) =

Answer 1

Leia abaixo

$1) (-12)-(+3)-(-20)\\-12-3+20\\5\\2)(-5)+(-8)-(+5)\\-5-8-5\\-18\\3)( - 4 ) - ( - 8 ) - ( -5 )\\-4+8+5\\9\\4)- ( -10) - ( - 20 ) + ( - 30 )\\10+20-30\\0\\5)2 + ( 2 + 5 -7 )\\2+(7-7)\\2\\6)-5 + ( 2-4 ) - ( 7-1 )\\-5+(2)-(6)\\-5+2-6\\-9\\7) - ( 2-3- ) - ( -9 )\\-(-1)+9\\10$✔

Bons estudos!!