(3,5 : 4 2/3 + 4 2/3 : 3,5)*4,8 = ?

(3,5 / 4 2/3 + 4 2/3 / 3,5) * 4,8 = 10;

1-ое деянье.

3,5 / 4 2/3 = 3 5/10 / 4 2/3 = 35/10 / 14/3 = 35/10 * 3/14 = 35 * 3/10 *14 = 1 * 3/2 * 2 = 3/4 = = 0,75;

2-ое деянье.

4 2/3 / 3,5 = 4 2/3 / 3 5/10 = 14/3 / 35/10 = 14/3 * 10/35 =  14 * 10/3 * 35 = 2 * 2/3 * 1 = 4/3 = = 1 1/3;  

Третье деянье.

3/4 + 1 1/3 = 3/4 + 4/3= 9/12 + 16/12 = (9 + 16)/12 = 25/12 = 2 1/12;

4-ое деянье.

2 1/12 * 4,8 = 2 1/12 * 4 8/10 = 25/12 * 48/10 = 25 * 48/12 * 10 = 5 * 2/1 * 1 = 10/1 = 10;