8мин-700м
80м,мин-?
1)80:8=10
2)700:10=7
11/12 и 13/16
нок (12,16)=48
11/12=44/48
13/16=39/48
44/48 》38/48
1) х + 9/20 = 3/4
Х = 3/4 - 9/20 = 15/20 - 9/20
Х = 6/20
2) 25/36 - х = 5/18
х = 25/36 - 5/18 = 25/36 - 10/36
х = 15/36
3) х - 13/20 = 1/10
х = 13/20 + 1/10 = 13/20 + 2/20
х = 15/20 = 3/4
<MPN = 80
<KPN = 70% от <MPN => <MPK = 30% от <MPN
80*0,3 = 24
Ответ: 24