Ж) (1+1/2+1/3) / (1- 1/2-1/3)=
= (1+ 3/6+2/6) / ( 1-3/6-2/6)=
= 1 5/6 : 1/6 = 11/6 * 6/1 = 11
з) (0,5-0,3) / (0,5+0,3) =
= 0,2/0,8 = 2/10 * 10/8 = 2/8 =1/4 =0,25
и) ((2+ 3/4 ) / (2-3/4) ) : 7/8=
= (2 3/4 / 1 1/4 ) : 7/8=
= (11/4 * 4/5 ) : 7/8=
= 11/5 * 8/7 = 11*8/ 5*7 = 88/35 = 2 18/35
к) 24/ (8+5) - 5/13 = 24/13 -5/13 = 19/13 = 1 6/13
л) 6/ (4-0,2) : (4-0,2) /6 =
= 6/ 3,8 * 6/3,8 = 6/1 * 10/38 * 6/1 * 10/38 =
= 3600/1444= 900/361= 2 178/361
м) 3/4 * 16²/8 * 3/4 =
= 3² * 4² *4² / 4²*8 = 9*16/1*8 = 9*2 =18