№635 пожалуйста!!!!!!!!!!!!!

12 4/5 * 3 3/4 - 4 4/11 * 4 1/8  ---------------------------------------- = 3,4    11 2/3 * 2 4/7 : 4 1/4 1) 12 4/5 * 3 3/4 = 64/5 * 15/4 = 16/1 * 3/1 = 16 * 3 = 48 2) 4 4/11 * 4 1/8 = 48/11 * 33/8 = 8/1 * 3/1 = 8 * 3 = 24 3) 48 - 24 = 24 5) 11 2/3 * 2 4/7 = 35/3 * 18/7 = 5/1 * 6/1 = 30 6) 30 : 4 1/4 = 30 : 17/4 = 30 * 4/17 = 120/17 7) 24 : 120/17 = 24 * 17/120 = 1 * 17/5 = 17/5 = 3,4