Question

$(\frac{1}{4}):(- \frac{2}{7}) =$
$(-\frac{5}{2}):(- \frac{9}{2}) =$
$(-\frac{4}{3}):(\frac{8}{4}) =$

Answer 1

olá!

(1/4) : ( - 2/7 ) =

(1/4) * ( - 7/2 ) =

 1/4 * ( - 7/2 ) =

   1           -   7                 7

------ x     --------- =   -  ----------

  4              2                  8

( - 5/2 ) : ( - 9/2 ) =

    5             2              10 : ²          5

 ------- x  ---------  =    --------   =  ---------

    2           9                 18 :²           9

  ( - 4/3 ) : ( 8/4 )

      4           4             16  : ²            8 : ²               4:²         2

  - ------ x  -------- =  _ ------    =  _ ---------- =  _ -------- =  _ -------    

     3           8                24 : ²         12 : ²               6 : ²        3 

* obs. você pode simplificar diretamente 16/8 = 2, e 24/8= 3

Bons estudos!