Explicación:
a)2-5-(-3)
2-5+3
-3+3
0
b)-4-(+7)+2
-4-7+2
-11+2
-9
c)- 2 +7 - 5 -6 +9 +1
5-5-6+9+1
o-6+9+1
-6+9+1
3+1
d)12 - 5 -9 -16 -8 + 2 +1
7-9-16-8+2+1
-2-16-8+2+1
-18-8+2+1
-26+2+1
-24+1
-23
e)243 -25+32 - 243 -12
218+32-243-12
250-243-12
7-12
-5
f)45- (72- 22) +5 -13
45-(50)+5-13
45-50+5-13
-5+5-13
0-13
-13
g)-2 -( 80+46) -2 + 100
-2-(126)-2+100
-2-126-2+100
-128-2+100
-130+100
-30
h)8+ (-5+2) - (-1 -9 ) +1
8+(-3)-(-10)+1
8-3+10+1
5+10+1
15+1
16
i)-9 - (7 -5 +2) + (4-6) - (-114)
-9-(4)+(-2)-(-114)
-9-4-2+114
-13-2+114
-15+114
99
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Explicación:
a)2-5-(-3)
2-5+3
-3+3
0
b)-4-(+7)+2
-4-7+2
-11+2
-9
c)- 2 +7 - 5 -6 +9 +1
5-5-6+9+1
o-6+9+1
-6+9+1
3+1
d)12 - 5 -9 -16 -8 + 2 +1
7-9-16-8+2+1
-2-16-8+2+1
-18-8+2+1
-26+2+1
-24+1
-23
e)243 -25+32 - 243 -12
218+32-243-12
250-243-12
7-12
-5
f)45- (72- 22) +5 -13
45-(50)+5-13
45-50+5-13
-5+5-13
0-13
-13
g)-2 -( 80+46) -2 + 100
-2-(126)-2+100
-2-126-2+100
-128-2+100
-130+100
-30
h)8+ (-5+2) - (-1 -9 ) +1
8+(-3)-(-10)+1
8-3+10+1
5+10+1
15+1
16
i)-9 - (7 -5 +2) + (4-6) - (-114)
-9-(4)+(-2)-(-114)
-9-4-2+114
-13-2+114
-15+114
99