Respostas

2014-08-23T09:24:57-03:00
A) -(-2)-(+4)+1
2-4+1
-1

B)-30+(-6)-(-8)
-30-6+8
-28
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2014-08-23T09:30:54-03:00
A)-(3-5)-(-4+8)-(-1)
-2-4-(-1)
-6-(-1)
-5


B)-30+(-5-1)-(-1-7)
-30+(-6)-(-8)
-36-(-8)
-28
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