Question

1- calcule:
a) (-2 -2/5) × (-3/4)²=
b) 1 (1/3)³ : (1/2-1)²=
c)(5 -1/2)² : (1/2-2)³=
d)(0,1 + 1/5) : (0,02 + 1/100) =
e)(1/5 - 1/2) - (1/3- 1/4) ×2/5=
f) -5/8 + 1/4 × (0,2) +1/2=
Preciso pra hj urgente !!!!!!!

Answer 1

Resposta:

Explicação passo-a-passo:

a)(-2 - 2/5) x (-3/4)² =

(-10/5 - 2/5) x (+9/16) =

-12/5 x 9/16 = -108/80 simplificando por  4 = - 27 / 20

b)1.(1/3)³ : (1/2 - 1 )² =

1. (1/27) : (1/2 - 2/2)² =

1/27 : (-1/2)² =

1/27 : (+1/4) =

1/27 : 1/4 =

1/27 x 4/1 = 4/27

c)(5 - 1/2)² : (1/2 - 2 )³ =

(10/2 - 1/2 ) ² : (1/2 - 4/2)³ =

(9/2)² : (-3/2)³ =

81/4 : - 27/8 =

81/4 x -8/27 = -648/108 simplificando por 108 = - 6

d)(0,1 + 1/5) : (0,02 + 1/100) =

(1/10 + 1/5) : ( 2/100 + 1/100) =

(1/10 + 2/10) : ( 3/100) =

3/10 : 3/100 =

3/10 x 100/3 = 300/30 simplificando por  30 = 10

e)(1/5 - 1/2 ) - (1/3 - 1/4) x 2/5 =

(2/10 - 5/10) - (4/12 - 3/12) x 2/5 =

(-3/10) - ( 1/12) x 2/5 =

-3/10 - 1/12 x 2/5 =

-3/10 - 2/60 =

-18/60 - 2/60 = -20/60 = simplificando por 20 =-1/3

f)-5/8 + 1/4 x (0,2) + 1/2 =

-5/8 + 1/4 x 2/10 + 1/2 =

-5/8 + 2/40 + 1/2 =

m.m.c = 40

-25/40 + 2/40 + 20/40 =

-25/40 + 22/40 = - 3/40