Respostas
respondido por:
1
A) (-2).(-3)+(-1+5)
+6+4=
10
B) (-12+10).(20+30)=
-2.50=
-100
C)(+20-5)x(12-4)-(-1+3)=
15x8-2=
120-2=
118
D) (-2)x(-5+3)-(-4+7)x(+4-1)=
-2x-2-3x3
4-9=
-5
E)(+12+3):(-10+5)-(-1+8)=
15/-5-7=
- 3-12=
- 15
F)(-8):(+4-2)-(-12):(-5+7)=
-8/2+12:2=
-4+6=
2
G)(-8):(-1+5)-(-2+8)x(+5+10-50=
-8+4-6x-45=
-4+270=
266
H)(-5+12)x(-5+4)+(+8-5):(-1+4)=
7x-1+3:3=
7+1=
8
I)(+5-4)x[-12+(-5+15):(+1-3)]=
1x[-12+10:-2]=
1x[-12-5]=
1x-17=
-17
J)(-12+25)-{-2-[-(+2)x(-10+5)]}=
13+{+2-[-2x-5]}=
13+{+2-10}=
13-8=
5
+6+4=
10
B) (-12+10).(20+30)=
-2.50=
-100
C)(+20-5)x(12-4)-(-1+3)=
15x8-2=
120-2=
118
D) (-2)x(-5+3)-(-4+7)x(+4-1)=
-2x-2-3x3
4-9=
-5
E)(+12+3):(-10+5)-(-1+8)=
15/-5-7=
- 3-12=
- 15
F)(-8):(+4-2)-(-12):(-5+7)=
-8/2+12:2=
-4+6=
2
G)(-8):(-1+5)-(-2+8)x(+5+10-50=
-8+4-6x-45=
-4+270=
266
H)(-5+12)x(-5+4)+(+8-5):(-1+4)=
7x-1+3:3=
7+1=
8
I)(+5-4)x[-12+(-5+15):(+1-3)]=
1x[-12+10:-2]=
1x[-12-5]=
1x-17=
-17
J)(-12+25)-{-2-[-(+2)x(-10+5)]}=
13+{+2-[-2x-5]}=
13+{+2-10}=
13-8=
5
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