Выполните умножение: 6/25*20/21=. 81/115*45/81= 5*2 1/5= 2 2/25*1 9/16=
6/25 * 20/21 = 120/525 =24/105 81/115 * 45 / 81 = 3645 / 9315 = 9/23 5 * 2,1/5 =55/5 = 11 2,2/25 * 1,9/16 = 1300/400 = 13/4=3,1/4
6/25*20/21=8/35 81/115*45/81=9/23 5*2 1/5=11 2 2/25*1 9/16=3 1/4