Respostas

2013-04-16T20:07:43-03:00

28+{13-[6-(5)+2]-1}

28+{13-[1+2]-1}

28+{13-3-1}]

28+9=37

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53-{20-[30-(15-1+6)+2]}

53-(20-[30-(20)+2]}

53-{20-[12]}

53-8=45

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{42+[(45-19)-(18-3)+1]-(28-15)-1}

{42+[(26)-(15)+1]-(23)-1}

{42+[12]-22}=32

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62={16-[7-(2)+1]}

62={16-[6]}

62=10  (f)

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