№1)
а) 3/8 * 4 = 3/2 = 1,5
б) 12/13 * 26 = 12/1 * 2 = 24
в) 11/14 * 0 = 0
г) 7/9 * 18/49 = 1 * 2/7 = 2/7
д) 3/25 * 5/12 = 1/5 * 1/4 = 1/20 = 0,05
ж) 14/15 * 3/7 = 2/5 = 0,5
з) 1(1/3) * 5/8 = 4/3 * 5/8 = 1/3 * 5/2 = 5/6
и) 2(1/5) * 2(3/11) = 11/5 * 25/11 = 1 * 5 = 5
№2)
S = a² = 7/15 * 7/15 = 49/225 см²
ответ: 49/225 см²
№3)
а) 0,5 * 2/15 = 1/2 * 2/15 = 1/15
б) 0,25 * 8/9 = 1/4 * 8/9 = 2/9
