Уменьшить а) 18/20 5/10 16/12 30/20 12/9 2/6 б) 55/22 17/51

а) 18/20 = (2 * 9)/(2 * 10) = 2/2 * 9/10 = 1 * 9/10 = 9/10 либо 0,9;

5/10 = 5/(2 * 5) = 5/5 * 1/2 = 1 * 1/2 = 1/2 или 0,5;

16/12 = (4 * 4)/(4 * 3) = 4/4 * 4/3 = 4/3 = (3 + 1)/3 = 1 1/3;

30/20 = (3 * 10)/(2 * 10) = 3/2 * 10/10 = 3/2 = 1,5 либо 1 1/2;

12/9 = (3 * 4)/(3 * 3) = 3/3 * 4/3 = 1 1/3;

2/6 = 2/(3 * 2) = 2/2 * 1/3 = 1/3.

б) 55/22 = (5 * 11)/(2 * 11) = 5/2 * 11/11 = 5/2 = 2 1/2 либо 2,5;

17/51 = 17/(3 * 17) = 1/3;

12/8 = (3 * 4)/(2 * 4) = 3/2 = 1,5 или 1 1/2;

24/40 = (8 * 3)/(8 * 5) = 3/5 = 0,6;

15/6 = (5 * 3)/(2 * 3) = 5/2 = 2,5;

10/100 = 10/(10 * 10) = 1/10 = 0,1.