СРОЧНО!!!!! ДАЮ 100 БАЛОВ
Ответы
Пошаговое объяснение:
№1
8 3/4 * 1 3/14 = 35/4 * 17/14 = 5/4 * 17/2 = 85/8 = 10 5/8
6 * 7/18 = 1 * 7/3 = 7/3 = 2 1/3
№2
8/15 : 24 = 8/15 * 1/24 = 1/15 * 1/3 = 1/45
1 3/5 : 5 1/3 = 8/5 : 16/3 = 8/5 * 3/16 = 1/5 * 3/2 = 3/10
№3
5/24х + 7 2/3 = 11 5/8
5/24х = 11 5/8 - 7 2/3
5/24х = 11 15/24 - 7 16/24
5/24х = 10 39/24 - 7 16/24
5/24х = 3 23/24
х = 3 23/24 : 5/24
х = 95/24 * 24/5
х = 19/1 * 1/1
х = 19/1
х = 19
№4
1) 11,25 - 3 5/12 = 11 1/4 - 3 5/12 = 11 3/12 - 3 5/12 = 10 15/12 - 3 5/12 = 7 10/12 = 7 5/6
2) 7 5/6 + 4,3 = 7 5/6 + 4 3/10 = 7 25/30 + 4 9/30 = 11 34/30
3) 11 34/30 - 7 19/30 = 4 15/30 = 4 1/2
4) 7 7/12 - 5 5/6 = 7 7/12 - 5 10/12 = 6 19/12 - 5 10/12 = 1 9/12 = 1 3/4
5) 4 1/2 : 1 3/4 = 9/2 : 7/4 = 9/2 * 4/7 = 9/1 * 2/7 = 18/7 = 2 4/7