Question

Preciso das contas resolvidas!
-7+6
-8-7
-18-9
5-45
-15-7
-8+12
-32-18
26-45
-72-72
-84-84
-10-100
-2-4-1
-8+6-1
12-7+3
4+13-21
-8+8+1
-7+6+9
-5-3-4-1
+10-43-17
-6-6+73
-30+30-40
-60-18+50
142-438+16
2) (+5)+(-8)
(-2)-(-3)
(-3)-(-9)
(-7)-(-8)
(-8)+(-6)-(-7)
(-4)+(-6)+(-3)
+15-3-(-1)
32-(+1)-(-5)
8-(+4-1)
-5-(-2+3-1)
18+(-1+8+2)
20-(+6-1+7)
+14+(+7)+(-6+4)
15-(2-4)-6
5+(6-8)+4
6-3-1-2
-(+2-5)-3+8-1

Answer 1

-7+6 = -1
-8-7 = -15
-18-9 = -27
5-45 = -40
-15-7 = -22
-8+12 = 12-8 = 4
-32-18 = -50
26-45 = -19
-72-72 = -144
-84-84 = -168
-10-100 = -110
-2-4-1 = -7
-8+6-1 = 6-9 = -3
12-7+3 = 5+3 = 8
4+13-21 = 17-21 = -4
-8+8+1 = 0+1 = 1
-7+6+9 = 9-1 = 8
-5-3-4-1 = -13
10-43-17 = 10-60 = -50
-6-6+73 = 73-12 = 61
-30+30-40 = 0-40 = -40
-60-18+50 = 50-60-18 = -10-18 = -28
142-438+16 = -296+16 = -280


(+5) + (-8) = 5-8 = -3
(-2)-(-3) = -2+3 = 1
(-3)-(-9) = -3+9 = 6
(-7)-(-8) = -7+8 = 1
(-8)+(-6)-(-7) = -8-6+7 = -8+1 = -7
(-4)+(-6)+(-3) = -4-6-3 = -13
15-3-(-1) = 15-3+1 = 16-3 = 13
32-(1)-(-5) = 32-1+5 = 37-1 = 36
8-(4-1) = 8-(3) = 8-3 = 5
-5-(-2+3-1) = -5-(0) = 5-0 = 5
18+(-1+8+2) = 18+(9) = 18+9 = 27
20-(6-1+7) = 20-(12) = 20-12 = 8
14+(7)+(-6+4) = 14+7+(-2) = 21-2 = 19
15-(2-4)-6 = 15-(-2)-6 = 15+2-6 = 17-6 = 11
5+(6-8)+4 = 5+(-2)+4 = 5-2+4 = 3+4 = 7
6-3-1-2 = 6-6 = 0
-(2-5)-3+8-1 = -(-3)-3+8-1 = 3-3+8-1 = 8-1 = 7


Obs:

-(-1) = -1.(-1) = -1.-1 = 1