пожалуйста помогите это срочно помогите !!!!!!!!!!!

1) 1. 2/15-23/6 = 4-115/30 = - 111/302. 5/2 * (-111/30) = -111/123. -111/12 - 11/4 = - 111-33 / 12 = -144/12 = -122) 1. 4/5 + 19/20 = 16+19/20 = 7/42. 41/6 + 14/3 = 41+28/6 = 69/6 = 23/23. - 8/7 * 7/4 = - 8/4 = -24. -2 * 23/2 = -2 целых 23/2