Question

Me ajudem a responder regras de sinais

-4-4+2-7+10-15+20=
+10-12+7-5+5-3=
-8+4-8+10-12-5+7=
-2+5-7+10-8=
+5-2+4-3+3+5-10=
-10+4-6+12+12-30=
+50-25+10-32+15=

Expressões numéricas

-2+{4-[2+4]-5+(7-1)}=
10+[4+(5+2-5+6)+2]-5=
40+{-5+(10-5+7)+4[5-4]+10}=
-5*{+4-2*(5-7)+4-(-2+8)-[10+4-8]:10}*4=

Answer 1

+2

+2

-12

-2

+2

-18

+18

-3

+19

+61

+16