С номера 47-58 пж да 30 баллов

5 7/8 - 2 2/3+4 5/6=5 21/24 - 2 16/24+4 20/24=7 25/24=8 1/24 6 8/15+4 5/18 - 3,6=6 48/90+4 25/90 - 3 54/90=7 19/90 (43 7/18 - 5 2/9) - 12 8/27=43 7/18 - 5 4/18 - 12 8/27=38 2/18 - 12 8/27=38 1/9 - 12 8/27=38 3/27 - 12 8/27=25 22/27 (31 -14 7/15) - (27 2/3 - 19 3/4)=16 8/15 - (24 8/12 -19 9/12)=16 8/15 - 4 11/12=16 32/60 - 4 55/60=11 37/60  . 5/6+2/7=35/42+12/42=47/42=1 5/42 11/25 - 3/10=22/50 - 15/50=7/50 15/16 - 3/4=15/16 - 12/16=3/16 3/20+7/15=9/60+28/60=37/60 13/16- 7/12=39/48 - 28/48=11/48 9/14+5/21=27/42+10/42=37/42 16/35 - 5/14=64/140 - 50/140=14/140=1/10 2/5+1/3 - 7/30=12/30+10/30 - 7/30=15/30=1/2 3/4 - 2/9+5/36=27/36 - 8/36+5/36=24/36=2/3