Question

Pfv é pra hj !! A) 2/3 + 5/3 : 7/3 =

B) 2/5+1/7 =

C) 2/3-1/4=

D) 5/4.3/7=

E) 5/8:1/3=

ME AJUDA PFVV

Answer 1

a) faltam. parentesis para indicar a ordem de execucao. Colocarei as duas opcoes:

2/3 + (5/3:7/3) = 2/3 + (5/3.3/7) = 2/3 + 5/7 = mmc(3,7) = 14+15/21 = 29/21
ou
(2/3 + 5/3) : 7/3 = 2+5/3 : 7/3 = 7/3 : 7/3 = 1


b) 2/5 + 1/7 => mmc(5,7) => 14+5/35 = 19/3

c) 2/3 - 1/4 => mmc(3,4) => 8-3/12 = 5/12

d) 5/4 . 3/7 => 5.3/4.7 = 15/28

e) 5/8 : 1/3 => 5/8 . 3/1 = 5.3/8.1 = 15/8

bons estudos!