Б) 4/5 * 10/27 *15/16 = 8/27*15/16 = 15/54= 5/18
в) 1/2*2/3*3/4*4/5 =1/3*3/5 = 1/5 =5
г) 6/7*7/8*8/9*9/10 = 6/8*8/10=6/10
д) 4/7*35/46*3/5 = 20/46*3/5 = 12/46 = 6/23
е)1/2*2/3*3/4*...*23/24*24/25 = 1/2*2/3*3/4 =1/3*3/4 =1/4 =4...... 23/24*24/25 = 23/25