вычислите - 8/13:4 4:8/13 4/5:3 3:4/5 15/7:5 5:15/7 21/16;7 7:21/16

Вычислим чему равно значение:

1) 8/13 : 4 = 8/13 * 1/4 = 8/(13 * 4) = 8/52 =2/13;

2) 4 : 8/13 = 4 * 13/8 = (4 * 13)/(4 * 2) = 13/2 = 6 1/2 = 6,5;

3) 4/5 : 3 = 4/5 * 1/3 = (4 * 1)/(5 * 3) = 4/15;

4) 3 : 4/5 = 3 * 5/4 = 15/4 = 3 3/4;

5) 15/7 : 5 = 15/7 * 1/5 = (15 * 1)/(7 * 5) = (3 * 5)/(7 * 5) = 3/7;

6) 5 : 15/7 = 5 * 7/15 = (5 * 7)/(3 * 5) = 7/3 = 2 1/3;

7) 21/16 : 7 = 21/16 * 1/7 = (21 * 1)/(16 * 7) = (7 * 3)/(16 * 7) = 3/16;

8) 7 : 21/16 = 7 * 16/21 = (7 * 16)/21 = (7 * 16)/(3 * 7) = 16/3 = 5 1/3.