(2/5-6,6) : (-1 1/4 - 1 1/3) = -6,2 : (- 5/4 - 4/3) = -6,2 : (-15/12 - 16/12)
= -6,2 * (-12/31) = 6,2 * 12/31=2,4
2-(6 7/8 - 7 1/3) : 3/4 = 2-(7/8 - 4/3) *4/3 = 2 - (21/24 - 32/24) * 4/3 =
= 2 - 11/24 * 4/3 = 2 - 11/18 = 1 7/18
2x*4,5-0,2*4,5-9+1,8x=0
9x-0,9-9+1,8x=0
10,8x-9,9=0
10,8x=9,9
x=9,9/10,8
x= 11/12
1) 270
2) 270
3) 270
4)270
5)270
5/24<7/36;14/45>13/60;4203/4216<5431/5331