Тема: разделение дробей. задание найдите приватное 1) 9:3/7;. 2) 1:3/17. 3)

1) 9 : 3/7 = 9 * 7/3 = (3 * 3 * 7)/3 = 3 * 7 = 21;

2) 1 : 3/17 = 1 * 17/3 = 17/3;

3) 9/32 : 18 = 9/32 * 1/18 = 9/(32 * 18) = 9/(32 * 2 * 9) = 1/64;

4) 11 2/3 : 3 1/9 = (11 * 3 + 2)/3 : (3 * 9 + 1)/9 = 35/3 : 28/9 = 35/3 * 9/28 = (35 * 9)/(3 * 28) =(7 * 5 * 3 * 3)/(3 * 4 * 7) = (5 * 3)/4 = 15/4;

5) 2 1/4 : 3 3/5 = (2 * 4 + 1)/4 : (3 * 5 + 3)/5 = 9/4 : 18/5 = 9/4 * 5/18 = (9 * 5)/(4 * 18) = 5/8;

6) 5 5/6 : 7/18 = (5 * 6 + 5)/6 * 18/7 = 35/6 * 18/7 = (35 * 18)/(6 * 7) = 5 * 3 = 15.