Обчыслить: 1) 4 1/6:5/7; 2)2/9:1 1/3; 3)1:2 3/8; 4)6 2/3:5 ;

Чтоб выполнить деянье со смешанной дробью, ее надобно перевоплотить в обыденную дробь.

1) 4 1/6 / 5/7 = 25/6 / 5/7 = 25/6 * 7/5 = 25 * 7/6 * 5 = 5 * 7/6 = 35/6 = 5 5/6;

2) 2/9 / 1 1/3 = 2/9 / 4/3 = 2/9 * 3/4 = 2 * 3/9 * 4 = 1 * 1/3 * 2 = 1/5 = 0,2;

3) 1 / 2 3/8 = 1 / 19/8 = 1 * 19/8 = 1 * 19/8 = 19/8 = 2 3/8;

4) 6 2/3 / 5 = 20/3 / 5 = 20/3 * 1/5 = 20 * 1/3 * 5 = 4 *1/3 * 1 = 4/3 = 1 1/3;

5) 7 / 5 3/5 = 7 / 28/5 = 7 * 5/28 = 7 * 5/28 = 1 * 5/4 = 5/4 = 1 1/4 = 1,25;

6) 3 3/4 / 15 = 15/4 / 15 = 15/4 * 1/15 = 15 * 1/4 * 15 = 1 * 1/4 * 1 = 1/4 = 0,25;