-15,64 : 3 2/5 +1 7/9*(-1 3/32) - |5,12| : |12,8| = -6 17/18,
1) -15,64 : 3 2/5= -1564/100 : 17/5= -1564/100 * 5/17= -92/20= -4 3/5 (или -4,6)
2) 1 7/9*(-1 3/32) = 16/9 * (-35/32) = -35/18 = - 1 17/18,
3) |5,12| : |12,8|= 5,12 :12,8= 512/100 :128/10= 512/100 *10/128= 2/5 (или 0,4)
4) -4,6 + (-1 17/18) - 0,4 = -5 - 1 17/18 = -6 17/18