Question

Respondam pf! URGENTE

Answer 1

a
( 2/5 + 1/2): 6/5
mmc = 10
( 4 +5)/10  *  5/6 =
9/10 * 5/6 = 45/60 = 3/4
b
( 3/4 + 1/2) * 2/7
mmc = 4
( 3 + 2)/4 * 2/7
5/4 * 2/7 = 10/28 = 5/14
c
3/1 * ( 1/1-1/5) =
3/1 * ( 5 - 1)/5 =
3/1 * 4/5 = 12/5 **
d
2/9 : ( 1/1 + 1/2 )²=
2/9 : [( 2 + 1)/2]² =
2/9 :  (3/2 )²=
2/9 * (2/3 )² = 
2/9 * 4/9 = 8/81
e
( 7/8 - 3/4)² * 1/2
[( 7 - 6)/8]² *  1/2
( 1/8)²  * 1/2 =
1/64 * 1/2 = 1/128
f
3  1/2 :  5  2/5  + 7/1  >>>>>>>>>  ( 3 * 2 ) + 1 = 7/2   e  ( 5 * 5)+2 = 27/5
7/2 : 27/5  + 7/1 =
7/2 * 5/27 + 7/1 =
35/54 + 7/1 =
( 35 + 378)/54 = 413/54 =7 int  35/54 >>>> ( 413/54