1)а.33/42 = 11/14 = 22/28
5/10 = 40/80
б.88/121 = 16/22
25/20 = 40/32 = 5/4
2)1/8<span> 3/</span>8<span> 5/</span>8<span> 7/</span><span>8</span>
3)6\1, 6\2, 6\3, 6\4, 6\5
Х*6/7=72
х= 72*7/6=84
84-72=12 осталось
4/6=2/3
15/20=3/4
8/10=4/5
15/10=3/2
20/30=2/3