Question

calcule o valor numérico das expressões indicadas

a)-1,25.0,2+0,52:0,4

b)-3²-(-6-10)-(-2)²

c)3/2.(-8/9)+3

d)2/5.(-1/4)²-1/8

Answer 1

a)-1,25.0,2+0,52:0,4 =
-0,25 + 1,3 =
1,05

b)-3²-(-6-10)-(-2)² =
-9 - (-16) - 4
-9 + 16 - 4 =
-13 + 16 =
3

c)3/2.(-8/9) +3=
-24/18 + 3 =
-8/6 + 3 =
-4/3 + 3/1 =
-4/3 + 9/3 =
5/3

d)2/5.(-1/4)²-1/8 =
2/5 . 1/16 - 1/8 =
2/80 - 1/8 =
2/80 - 10/80 =
-8/80 = -1/10

Bons estudos! :)