X14.8 _ 3.4_ _ 592 444_ _ _ 50.32
280:45=6. (ост. 40)
541:67=8, ост 8
818:23=35, ост. 13
623:76=8, ост 15
330:62=5, ост 20
465:74=6, ост 21
1. 60:12*13=65
65+60=125
375:125=3часа
2.1/7 2/7 3/7 4/7 5/7 6/7
3.7/7 8/7 9/7 10/7 таких дробей бесконечно
4.1)5/7>2/7
2)4/15<7/15
3)2/9=26/117 2/13=18/117
26/117>18/117
4)7/25=42/150
7/30=35/150
42/150>35/150
-1,8 * (2/3)² - 7/8 = -18/10 * 4/9 - 7/8 = -4/5 - 7/8 =
= -32/40 - 35/40 = - 67/40 = -1 27/40