а) -0,284/7+5/7:2 6/7-0,28 4/7 = -0,165/7:2 6/7 = 5/7 * 7/16 = 5/16-0,16 + 5/16 = 5/16 - 1/16 = 4/16 = 1/4
Ответ: 1/4
б) 5/6(-0,3) - 4/5:1 1/155/6 (-0,3) = -0,254/5:1 1/15 = 4/5 / 16/15 = 4/5 * 15/16 = 3/4
-0,25 - 3/4 = -1/4 - 3/4 = -4/4 = -1
Ответ: -1
а) -0,284/7+5/7:2 6/7
-0,28 4/7 = -0,16
5/7:2 6/7 = 5/7 * 7/16 = 5/16
-0,16 + 5/16 = 5/16 - 1/16 = 4/16 = 1/4
Ответ: 1/4
б) 5/6(-0,3) - 4/5:1 1/15
5/6 (-0,3) = -0,25
4/5:1 1/15 = 4/5 / 16/15 = 4/5 * 15/16 = 3/4
-0,25 - 3/4 = -1/4 - 3/4 = -4/4 = -1
Ответ: -1