Question

resolva as expressões...

Answer 1

a)25+[(12-6)+8] = 25+[(6)+8] = 25+[14] = 39
b)0-{[(5+5)-3]-2} = 0-{[(10)-3]-2} = 0-{[7]-2} = 0-{5} = -5
c)45+{42-[18+(9-5)+51]} = 45+{42-[18+(4)+51]} = 45+{42-[69+(4)]} = 45+{42-[73]} = 45+{ 42-73} = 45+{-31} = 14
d)17+{[26-(15-8)+(8-4)]-9} = 17+{[26-(7+4)]-9} = 17+{[26-(3)]-9} = 17+{[23]-9} = 17+{14} = 31

Answer 2

Olá, boa tarde!

A resolução desse problema é bem simples:

a) 25 + [(12 - 6) + 8]

25 + [6 + 8]

25 + 14

39

b) 0 - {[(5 + 5) - 3] - 2}

0 - {[10 - 3] - 2}

0 - {7 - 2}

0 - 5

-5

c) 45 + {42 - [18 + (9 - 5) + 51]}

45 + {42 - [18 + 4 + 51]}

45 + {42 - 73]

45 + (-31)

45 - 31

14

d) 17 + {[26 - (15 - 8) + (8 - 4)] - 9}

17 + {[26 - 7 + 4] - 9}

17 + {23 - 9}

17 + 14

31