Question

Resolvas as expressões numéricas:

a) (−9). (+6) − 2

b) √81 ÷ (5² − 4²)

c) [(−1)7
. (2)3]² ÷ (−4)³

d) 4. (−20) − (−120): (2) + 28 ÷ (−7)​

Answer 1

A)(-9)x(+6)-2

(-54)-2

+52

B) (√81:(5²-4²0

9:25-16

9:9

1

C) [(-1)7x(2)3]²:(-4)3

(-1)7x(2)3²÷256

-1x7x2x81÷256

-7x81÷256

-567÷256

-2.214

d) 4. (−20) − (−120): (2) + 28 ÷ (−7)​

-8-(-120)÷2+28÷(-7)

(-128)÷2+28÷(-7)

(-128)÷2+(-4)

(-64)+(-4)

-68

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