Question

Resolva as expressões:
a) (-2).(-5+7)-(-5+8).(4-1)
b) (-8):(4-2)-12:(-5+7)
c) (12-5).(-5+4)+(8-5):(-1+4)
d)(-12+25)-{-2-[-2.(-10+5)]}
e){-20+(-7+9)³-[-7+9-(-1+5)]-(-2)³}
f){12-(-5+9)²-[5.(-2+13)⁰-(-5+3)]}
g)(-4+7)²-√(-5+8)²+(-9+5)²

Answer 1

a) (-2)×(-5+7)-(-5+8)×(4-1)

(-2)×2-3×3

-4-9

-13

b) (-8)÷(4-2)-12÷(-5+7)

(-8)÷2-12÷2

-4-6

-10

c) (12-5)×(-5+4)+(8-5)÷(-1+4)

7×(-1)+3÷3

-7+1

-6

d) (-12+25)-{-2-[-2×(-10+5)]}

13-{-2-[2×(-5)]}

13-{-2-10}

13-{-12}

13+12

25

e) {-20+(-7+9)³-[-7+(-(-1+5)]-(-2)³}

{-20+2³-[-7+9-4]-(-8)}

{-20+8-[-2]+8}

{-20+8+2+8}

{-2}

-2

f) {12-(-5+9)²-[5×(-2+13)⁰-(-5+3)]}

{12-4²-[5×1-(-2)]}

{12-16-[5+2]}

{12-16-7}

{-11}

-11

g) (-4+7)²-√(-5+8)²+(-9+5)²

3² -√3²+(-4)²

9-3+16

22