Va rog urgent dau coroana și ma abonez 4,5

Răspuns:
4.
8/7-5/5=8/7-1=8/7-7/7=1/7
3-3/5=3×5/5-3/5=15/5-3/5=12/5
2+6/18=2×3/3+1/3=6+1/3=7/3
29/15-1=29/15-15/15=14/15
5.
5/6 din 42=5/6×42=35
5/6 din 330=5/6×330=275
9/8 din 568=9/8×568=639
Răspuns:
4) 4/5+5/5=9/5
6/2+3/2=9/2
8/7-5/5=1/7
3-3/5=12/5
2+6/18=7/3
29/15-1=14/15
5)1/4• 160=40
5/6•42=35
5/6•330=275
9/8•568=639