Question

de la a pana la g....va roooooooooooooog mult

Answer 1

5.
a)( 3/5·25/21+9/14:9/26)·14/6=(5/7+9/7·26/9)·7/3=(5/7+26/7)·7/3=31/7·7/3=31/3
b)(15/16:35/32+8/9:56/24):26/21=(15/16·32/35+8/9·24/56)·21/26=
=(10/7+8/21)·21/26=[(30+8)/21]·21/26=38/21·21/26=19/13
c)(4/47:16/94+9/25·72/200)·(5/12:20/18)=
=(4/47·94/16+(9·9)/(25·25))·(5/12·18/20)=
=(1/2+81/625)·9/24=[(625+162)/(625·2)]·9/24