Question

Calcule o valor das expressões

a) -2+{-1+[5-3•(10+1):3]-5•7}

b) -5-[3•(7-5-3)-22:11]

c) 2-(5•10+6)-5•20:(-17+13)

d) 3-{30:5-[-7•(5-2)+3]:6}

Answer 1

a) -2+{-1+[5-3•(10+1):3]-5•7} ==> -2+{-1+[5-3•(11):3]-5•7}

-2+{-1+[5-33:3]-35} ==> -2+{-1+[5-11]-35} ==> -2+{-1-6-35} ==> -2-42==> -44
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b) -5-[3•(7-5-3)-22:11] ==> -5-[3•(-1)-2] ==> -5-[-3-2] ==> -5+5 ==> 0
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c) 2-(5•10+6)-5•20:(-17+13) ==> 2-(50+6)-5•20:(-4) ==> 2-56-5•(-5)

 2-56+25 ==> - 29
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d) 3-{30:5-[-7•(5-2)+3]:6} ==> 3-{6-[-7•(3)+3]:6} ==> 3-{6-[-21+3]:6}

3-{6-[-18]:6} ==> 3-{6-[-3]} ==> 3-{6+3} 3 - 9 ==> - 6