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] - 5 • 7}

= -2 + {-1 + [5 - 11] - 5 • 7}

= -2 + {-1 + [-6] - 35}

= -2 + {-7 - 35}

= -2 + {-42}

= -2 - 42

= -44

b)

-5 - [3 • (7 - 5 - 3) - 22 ÷ 11]

= -5 - [3 • (-1) - 2]

= -5 - [-3 - 2]

= -5 - [-5]

= -5 + 5

= 0

c)

2 - (5 • 10 + 6) - 5 • 20 ÷ (-17 + 13)

= 2 - 56 - 5 • 20 ÷ (-4)

= 2 - 56 - 100 ÷ (-4)

= -54 + 25

= -29

d)

3 - {30 ÷ 5 - [-7 • (5 - 2) + 3] ÷ 6}

= 3 - {30 ÷ 5 - [-7 • 3 + 3] ÷ 6}

= 3 - {30 ÷ 5 - [-21 + 3] ÷ 6}

= 3 - {30 ÷ 5 - [-18] ÷ 6}

= 3 - {6 + 18 ÷ 6}

= 3 - {6 + 3}

= 3 - 9

= -6

Espero ter ajudado.