Question

{[(90_40)_20}+12}

28+{[37-(17_9)+10_6)]-5)

98+{37_(17+(10_7)+7]}

Answer 1

Resposta:

{[(90-40)-20]+12}

{[50-20]+12}

{30+12}

42

28+{[37-(17-9)+10-6]-5}

28+{[37-8+10-6]-5}

28+{[29+10-6]-5}

28+{[39-6]-5}

28+{33-5}

28+28

56

98+{37-[17+(10-7)+7]}

98+{37-[17+3+7]}

98+{37-[20+7]}

98+{37-27}

98+10

108

Explicação passo-a-passo:

Espero ter ajudado!