решите этот пример по действиям 1 1/7*(4/5+19)*(6 5/6+4 2/3

1) 4/5 + 19/20 = 16/20 + 19/20 = 35/20 = 7/4 = 1 3/4
2) 6 5/6 + 4 2/3 = 6 5/6 + 4 4/6 = 10 9/6 = 10 3/2 = 11 1/2
3) 1 1/7 * 1 3/4 = 8/7 * 7/4 = 2
4) 2 * 11 1/2 = 2 * 23/2 = 23

6 5/6 , 4 2/3 и 1 1/7 переведем в неправильные дроби
6 5/6 = 41/6
4 2/3 = 14/3
1 1/7 = 8/7
1. 4/5 + 19 = 19 4/5 = 99/5
2. 41/6 + 14/3 = 41/6 + 28/6 = 69/6 = 23/3
3. 8/7 * 99/5 = 792/35
4. 792/35 * 23/3 = 18216/105 = 672/35 = 96/5 = 19,2