A) 2/9*(9/2*(-1_1/5))*(-2)= b) (3_1/3*2_1/4)*((-1/2)*4/5)=

A) 2/9 * (9/2 * (-1 1/5)) * (-2) = 2/9 * 9/2 * (-6/5) * (-2) = 2/9 * 9/2 * 6/5 * 2 = 6/5 * 2 = 12/5;

Ответ: 12/5.

b) (3 1/3 * 2 1/4) * ((-1/2) * 4/5) = ((3 * 3 + 1)/3 * (2 * 4 + 1)/4) * ((-1/2) * 4/5) = 10/3 * 9/4 * (-4/10) = -(10 * 9 * 4)/(3 * 4 * 10) = -3;

Ответ: -3.