Respostas

2014-02-22T12:34:15-03:00
A) -13-14 = -27
b) 33+20= 53
c) 47+19= 66
d)-32-129= -161
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2014-02-22T12:35:39-03:00
A ) (-13 ) + (-14) = -27
b ) + 33 + 20 =  +53
c ) (+47) + (+19) = + 66
d ) -32 - 129 = -161
1 5 1