Помогите решить пожалуйста: 1) 7/10 * 2 - 7/10 : 2= 2) 10 2/5 * 2 - 13 1/5 : 6= 3) 26 : 13 - 1/8 : 2=

а) 7/10 * 2 - 7/10 : 2 = 1 1/20; 1) 7/10 * 2 = (7 * 2)/10 = (7 * 1)/5 = 7/5 = 1 2/5; 2) 7/10 : 2 = 7/10 * 1/2 = (7 * 1)/(10 * 2) = 7/20; 3) 1 2/5 - 7/20 = 1 8/20 - 7/20 = 1 1/20. Ответ: 1 1/20; б) 10 2/5 * 2 - 13 1/5 : 6 = 18 3/5; 1) 10 2/5 * 2 = 52/5 * 2 = (52 * 2)/5 = 104/5 = 20 4/5; 2) 13 1/5 : 6 = 66/5 * 1/6 = (66 * 1)/(5 * 6) = (11 * 1)/(5 * 1) = 11/5 = 2 1/5; 3) 20 4/5 - 2 1/5 = 18 3/5. Ответ: 18 3/5; в) 26 : 13 - 1/8 : 2 = 26/13 - 1/8 * 1/2 = 2 - (1 * 1)/(8 * 2) = 2 - 1/16 = 1 16/16 - 1/16 = 1 15/16. Ответ: 1 15/16.