Question

a)-10+[2-1+(-20+4)]=

b)25-[-5-(2-5-1)+3]+9=

c)20-4-[4-(-6+10)]=

d)2+{+8-[-5-(+7-3)]-7}=
quem saber essas quatro matemática me ajudem?!

Answer 1

∈∧∨∞∞⇔ + com - = nao sei nada dessa continha

Answer 2

a)-10+[2-1+(-20+4)]
-10+[2-1+(-16)]
-10+[1-16]
-10-15
-25

b)25-[-5-(2-5-1)+3]+9
25-[-5-(-4)+3]+9
25-[-5+4+3]+9
25-[+2]+9
25-2+9
32

c)20-4-[4-(-6+10)]
20-4-[4-4]
20-4
16

d)2+{+8-[-5-(+7-3)]-7}
2+{+8-[-5-4)]-7}
2+{+8+9-7}
2+10
12