Question

2°) Efetue:
I- A multiplicação das frações:
a)8/3×2/4×3/5
b)9×6/9×2/3
c)3/6×2/5×9/4
d)34/14×45/76​

Answer 1

$a)\\\\8/3\times \:2/4\times \:3/5\\\\=\frac{8}{3}\times \:2/4\times \:3/5\\\\=\frac{16}{3}/4\times \:3/5\\\\=\frac{4}{3}\times \:3/5\\\\=4/5\\\\=\frac{4}{5}$      $b)\\\\9\times \:6/9\times \:2/3\\\\=54/9\times \:2/3\\\\=6\times \:2/3\\\\=12/3\\\\=4$      $c)\\\\3/6\times \:2/5\times \:9/4\\\\=\frac{3}{6}\times \:2/5\times \:9/4\\\\=1/5\times \:9/4\\\\=\frac{1}{5}\times \:9/4\\\\=\frac{9}{5}/4\\\\=\frac{9}{20}$

$d)\\\\34/14\times \:45/76\\\\=\frac{34}{14}\times \:45/76\\\\=\frac{765}{7}/76\\\\=\frac{765}{7}/76\\\\\frac{765}{532}=1\frac{233}{532}\\\\=1\frac{233}{532}$

Answer 2

Resposta:

a)8/3×2/4×3/5

(8*2*3)/(3*4*5) = 48/60 = 4/5

b)9×6/9×2/3

(9*6*2)/(9*3) = 108/27 = 4

c)3/6×2/5×9/4

(3*2*9)/(6*5*4) = 54/120 = 9/20

d)34/14×45/76​

(34*45)/(14*76) = 1530/1064 = 765/532