Прошу помогите пожалуйста 1 ),2),3)

№ 1. 8 2/25 * (4 1/3 + 2 2/5) - 4/15 + 27/40 : 2 1/4 + 7/15 = 54 679/750 1) 4 1/3 + 2 2/5 = 4 5/15 + 2 6/15 = 6 11/15 2) 8 2/25 * 6 11/15 = 202/25 * 101/15 = 20402/375 = 54 152/375 3) 27/40 : 2 1/4 = 27/40 : 9/4 = 27/40 * 4/9 = (3*1)/(10*1) = 3/10 4) 54 152/375 - 4/15 = 54 152/375 - 100/375 = 54 52/375 5) 54 52/375 + 3/10 = 54 104/750 + 225/750 = 54 329/750 6) 54 329/750 + 7/15 = 54 329/750 + 350/750 = 54 679/750 ----------------------------------- № 2. (19 - 15 4/7) : 16/21 + 6 3/5 - 4 5/6 = 6 4/15 1) 19 - 15 4/7 = 18 7/7 - 15 4/7 = 3 3/7 2) 3 3/7 : 16/21 = 24/7 * 21/16 = (3*3)/(1*2) = 9/2 = 4 1/2 3) 4 1/2 + 6 3/5 = 4 5/10 + 6 6/10 = 10 11/10 = 11 1/10 4) 11 1/10 - 4 5/6 = 11 3/30 - 4 25/30 = 10 33/30 - 4 25/30 = 6 8/30 = 6 4/15 ----------------------------------- № 3. (17 : 3 2/5 - 6 3/8 : 3 3/8) : (1 1/5 - 29/30) = 13 1/3 1) 17 : 3 2/5 = 17 : 17/5 = 17 * 5/17 = 5 2) 6 3/8 : 3 3/8 = 51/8 : 27/8 = 51/8 * 8/27 = 51/27 = 17/9 = 1 8/9 3) 5 - 1 8/9 = 4 9/9 - 1 8/9 = 3 1/9 4) 1 1/5 - 29/30 = 1 6/30 - 29/30 = 36/30 - 29/30 = 7/30 5) 3 1/9 : 7/30 = 28/9 * 30/7 = (4*10)/(3*1) = 40/3 = 13 1/3