Question

resolva as expressões:
a) (-9)²-5.16
b) -16:16.-1
c) (-3)²:(1-0,8)-(2,2)²

Answer 1

Resolva as expressões:
a) (-9)²-5.16

(-9)² - 5.16

(-)(-)81 - 80
  +  81 - 80 = 1

b) -16:16.-1
      - 1 . -1  = (-)(-) 1.1 =  + 1
                     
c) (-3)²:(1-0,8)-(2,2)²
 
(-)(-)9 : (0,2) - (4,84)
   + 9 : (0,2) - 4,84 =
         45 - 4,84 =  40,16

Answer 2

A) 81-80=1
B)-16/16 -1
-1-1=-2
C)9/0,2-4,84
45-4,84=40,16