1целая1/2*2/9-(6-5целых3/5)в квадрате =? 1/3*(4-(1целая1/2)в кубе)*(3-2целых7/15)=?

а) 1 1/2 * 2/9 - (6 - 5 3/5)2степ = 7/25.
    6 = 5 5/5 = (5 * 5 + 5)/5 = 30/5.
    5 3/5 = (5 * 5 + 3)/5 = 28/5.
    1 1/2 = (1 * 2 + 1)/2 = 3/2.
 1. 30/5 - 28/5 = 2/5.
 2. 3/2 * 2/9 = (3 * 2)/(2 * 9) = 6/18 на 6 = 1/3.
 3. 1/3 - (2/5)2 = 1/3 - 4/25 = (25 - 4)/75 = 21/75 на 3 = 7/25.
б) 1/3 * (4 - (1 1/2)3) * (3 - 2 7/15) = 1/9.
    1 1/2 = (1 * 2 + 1)/2 = (3/2)3 = (3 * 3 * 3)/(2 * 2 * 2) = 27/8.
    4 = 3 8/8 = (3 * 8 + 8)/8 = 32/8.
    2 7/15 = (2 * 15 + 7)/15 = 37/15.
    3 = 2 15/15 = (2 * 15 + 15)/15 = 45/15.
 1. 32/8 - 27/8 = 5/8.
 2. 45/15 - 37/15 = 8/15.
 3. 1/3 * 5/8 * 8/15 = (1 * 5 * 8)/(3 * 8 * 15) = 40/360 на 40 = 1/9.