(-3,8+две целых одна третье)*(-одна целая семь восьмых)+четыре целых одна шестая/(-одна целая

(-3,8 + 2 1/3) * (-1 7/8) + 4 1/6 : (-1 2/3) = 23/100.

1) -3,8 + 2 1/3 = -3 - 8/10 + 2 + 1/3 = -1 - 4/5 + 1/3 = -1 - (4 * 3)/(5 * 3) + (1 * 5)/(3 * 5) = -1 - 12/15 + 5/15 = -1 7/15;

2) -1 7/15 * (-1 7/8) = (-1 * 15 - 7)/15 * (-1 * 8 - 7)/8 = -22/15 * (-15)/8 = 22/8 = (2 * 11)/(2 * 4) = 11/4 = 2 3/4;

3) 4 1/5 : (-1 2/3) = (4 * 5 + 1)/5 : (-1 * 3 - 2)/3 = 21/5 : (-5)/3 = 21/5 * (-3)/5 = (21 * (-3))/(5 * 5) = -63/25 = -2 13/25;

4) 2 3/4 - 2 13/25 = 2 - 2 + 3/4 - 13/25 = (3 * 25)/(4 * 25) - (13 * 4)/(25 * 4) = 75/100 - 52/100 = 23/100.