Найдите значение выражения 6 1/7: (1 3/7+2 2/3)
6 1/7 : ( 1 3/7 + 2 2/3 ) =1 1/2 1) 1 3/7 + 2 2/3 = 10/7 + 8/3 = 30/21 + 56/21 = 86/21= 4 2/21 2) 6 1/7 : 4 2/21 = 43/7 * 21/86 = 3/2 = 1 1/2