(2) Respostas
b) 2-{8+[3x3-1]-16} 2-{8+8-16} 2-0= 2
2-{8+[3X(8-5)-1]-16}= 2-{8+[3x(3)-1]-16}= 2-{8+[9-1]-16} 2-{8+[8]-16}= 2-{16-16}= 2-{0} 2
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b) 2-{8+[3x3-1]-16} 2-{8+8-16} 2-0= 2
2-{8+[3X(8-5)-1]-16}= 2-{8+[3x(3)-1]-16}= 2-{8+[9-1]-16} 2-{8+[8]-16}= 2-{16-16}= 2-{0} 2