Question

Exercițiul nr 9 si 10 .Va rog sa ma ajutati!Dau coroana.

Answer 1

scriem nr sub forma de fractie
1,2(7)=(127-12)/90=115/90=23/18
7,(6)=(76-7)/9=69/9=23/3
23/18:23/3:15/10=23/18 x 3/23:15/10=3/18 x 3/2=1/6 x 3/2=3/12=1/4
rezolvam numaratorul 4/3:8/9=4/3 x 9/8=36/24=3/2
rezolvam numitorul 3/2:2/5=3/2 x 5/2=15/4
3/2:15/4:8/15=3/2 x 4/15:8/15=12/30 x 15/8=6/15 x 15/8=6/8=3/4