Question

Qual o calculo das frações:
a)8/5 x 3/2 x 15/4
b)1/5 x 20/8 x 64/4
c)8/6 x 12/7 x 21/16
d)16/15 x 25/2
e)1/2 x 169/12 x 144/13
f)12/5 x 3/6 x 15/3 x 18/4
g)8/21 x 7/56
h)2/3 x 3/2

Answer 1

Resposta:

Explicação passo-a-passo:

a)8/5 x 3/2 x 15/4

= 8/2 . 15/5 . 3/4

= 4. 3 . 3/4

= 36/4

= 9

____________

b)1/5 x 20/8 x 64/4

= 1/5 . 20/4 . 64.8

= 1/5 . 5 . 8

= 8

__________

c)8/6 x 12/7 x 21/16

= 8/16 . 12/6 . 21/7

= 1/2 . 2 . 3

= 2/2 . 3

= 1.3

= 3

________

d)16/15 x 25/2

= 16/2 . 25/15 (:5)/(:5)

= 8 . 5/3

= 40/3

__________

e)1/2 x 169/12 x 144/13

= 144/12 . 169/13 . 1/2

= 12.13. 1/2

= 6.13

= 78

________

f)12/5 x 3/6 x 15/3 x 18/4 (:2)/(:2)

= 12/5 . 1/2 . 5/1 . 9/2

= 5/5 . 12/2 . 1/1 . 9/2

= 1 . 6 .1 . 9/2

= 54/2

= 27

______________

g)8/21 x 7/56

= 7/21 (:7)/(:7). 8/56(:8)/(:8)

= 1/3. 1/7

= 1/21

___________

h)2/3 x 3/2

= 3/3 . 2/2

= 1