1) -3,8 + 2 1/3 = -(3,8 - 2 1/3) = -(3 8/10 - 2 1/3) = -(3 4/5 - 2 1/3) = -(3 12/15 - 2 5/15) = -1 7/15
2) -1 7/15 * (-1 7/8) = 1 7/15 * 1 7/8 = 22/15 * 15/8 = 11/4 = 2 3/4
3) 4 1/6 : (-1 2/3) = -4 1/6 : 1 2/3 = -25/6 : 5/3 = -25/6 * 3/5 = -5/2 = -2 1/2
4) 2 3/4 + (-2 1/2) = 2 3/4 - 2 1/2 = 2 3/4 - 2 2/4 = 1/4
Ответ: 1/4
1) -3,8 + 2 1/3 = -(3,8 - 2 1/3) = -(3 8/10 - 2 1/3) = -(3 4/5 - 2 1/3) = -(3 12/15 - 2 5/15) = -1 7/15
2) -1 7/15 * (-1 7/8) = 1 7/15 * 1 7/8 = 22/15 * 15/8 = 11/4 = 2 3/4
3) 4 1/6 : (-1 2/3) = -4 1/6 : 1 2/3 = -25/6 : 5/3 = -25/6 * 3/5 = -5/2 = -2 1/2
4) 2 3/4 + (-2 1/2) = 2 3/4 - 2 1/2 = 2 3/4 - 2 2/4 = 1/4
Ответ: 1/4