Выполните действия 4/5:2 2/3+3 1/2, 170 8/51-2 4/9:3 2/3

 4/5 : 2 2/3 + 3 1/2 = 4/5 : 8/3 + 7/2 = 4/5 * 3/8 + 7/2 = 1/5 * 3/2 + 7/2 = 3/10 + 7/2 = 

= 3/10 + 35/10 = 38/10 = 19/5 = 3 4/5 или 3,8; 

170 8/51 - 2 4/9 : 3 2/3 = 8678/51 - 22/9 : 11/3 = 8678/51 - 22/9 * 3/11 = 8678/51 - 2/3 =

= 8678/51 - 34/51 = 8644/51 = 169 25/51.