Вычислите; 11/5*21/2; 2 1/4*3 1/3; -5 5/11*2 1/5; -12/13*(-26/27); 7/25:1,4;

11/5 * 21/2 = 231/10 = 23 1/10 или 23,1;

2 1/4 * 3 1/3 = 9/4 * 10/3 = 3/2 * 5/1 = 15/2 = 7 1/2 или 7,5;

-5 5/11 * 2 1/5 = -60/11 * 11/5 = -12/1 * 1/1 = -12;

-12/13 * (-26/27) = -12/1 * (-2/27) = 24/27;

7/25 : 1,4 = 7/25 : 35/25 = 7/25 * 25/35 = 7/35 = 1/5.