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3+4+6-5-2-1
13-8
5
5 –3 +4 –1 +2
5+4+2-3-1
11-4
7
3 –5 –4 +7 +1
3+7+1-5-4
11-9
2
5 +3 –7 –2 +1 +4 -6
5+3+1+4-7-2-6
13-15
-2
Identificamos los positivos(+)sumamos, y los negativos(-) restamos, así:
a)(3+4+6-5-2-1) = +13-8 =5
b)5+4+2-3-1 =11-4 =7
c)3+7+1-5-4 =11-9 =2
d)5+3+1+4-7-2-6 =13-15 =-2
Espero haberte ayudado. Adiós.