Помогите пожалуйста, немогу решить...даю 20баллов
1) 4 1/3 + 11/9 * 7/11= 4 1/3+ 7/9 = 4 3/9 + 7/9 = 4 10/9= 5 1/9 2)(10/12-9/12) : 7/12= 1/12* 12/7= 1/7 3)4/9 * 9/2 : 7/3 = 2* 3/7= 6/7 4) 12/7 * 4/25 : 8/7 = 12/7 * 4/25 * 7/8 = 12/1* 1/25 * 1/2 = 6/25
1) 13/3 + 11/9 * 7/11 = 13/3 + 7/9 = 46/9 2) (5/6 - 3/4) : 7/12 = 1/12 : 7/12 = 1/7 3) (2/3)² * 9/2 : 7/3 = 4/9 * 9/2 : 7/3 = 6/7 4) 12/7 * 2/5² : 8/7 = 12/7 * 4/25 * 7/8 = 6/25