Question

Pff ke ajude tenho q termina hoje vou bota uma ft

Questao e assim calcule o valod da expressoes a seguir preciso com contas

Answer 1

Vamos lá :

b)

3 1/5 + 2 1/9 - 2/3 : 4/9

(3.5 + 1)/5 + (2.9 + 1)/9 - 2/3 * 9/4

16/5 + 19/9 - (2*9)/(3*4)
16/5 + 19/9 - 18/12

Mmc(5 , 9 , 12) = 180

(16*36 + 19*20 - 18*15)/180

= (576 + 380 - 270)/180
= 686/180

c)

3 2/5 : (2 1/3 + 1 5/7)

= (15 + 2)/5 : ((2*3 + 1)/3 + (1*7 + 5)/7 )
= 17/5 :(7/3 + 12/7)

Mmc (3 , 7) = 21

= 17/5 : ((7*7 + 12*3 )/21)
= 17/5 : ((49 + 36)/21)
= 17/5 : (85/21)
= 17/5 * 21/85
= (17*21)/(5*85)
= 357/425

d) 

27/100 : {11/4 - [3/2 + (1/2 + 1/4)]}

Mmc (2 , 4) = 4

= 27/100 : {11/4 - [3/2 + ((2*1 + 1)/4)]}
= 27/100 : {11/4 - [3/2 + 3/4]}
= 27/100 : {11/4 - [(6 + 3)/4]}
= 27/100 : {11/4 - 9/4}
= 27/100 : {(11 - 9)/4}
= 27/100 : 2/4
= 27/100 : 1/2
= 27/100 * 2/1
= 54/100

e)

(1 - 1/2)² : [(1 - 3/4)²*8  + (1/2)²]

= (2/2 - 1/2)² : [(4/4 - 3/4)²*8 + 1/4]
= (1/2)² : [(1/4)²*8 + 1/4]
= 1/4 : [1/16 * 8 + 1/4]
= 1/4 : [8/16 + 1/4]
= 1/4 : [8/16 + 4/16]
= 1/4 : [12/16]
= 1/4 * 16/12
= 16/48

f)

{[1 - (3/8 * 2/3 : 1/3)] + √(25/4)} - (1/10)⁰


= {[1 - (3/8 * 2/3 * 3/1)] + 5/2} - 1
= {[1 - (3/8 * 2)] + 5/2} - 1
= {[1 - (6/8)] + 5/2} - 1
= {[8/8 - 6/8] + 5/2} - 1
= {2/8 + 5/2} - 1
= {2/8 + 20/8} - 1
= 22/8 - 1
= 22/8 - 8/8
= (22 - 8)/8
= 14/8

Espero ter ajudado !!!