1)
44 : (-2 5/10) =
44 : (-2 1/5) =
44 : (-(2*5 + 1)/5 =
44 : (- (10 + 1))/5 =
44 : -11/5=
44 * 5/(-11)=
-4 * 5 = -20
4 3/10 * 0,8 =
(4*10 + 3)/10 * 0,8 =
(40 + 3)/10 * 0,8 =
43/10 * 8/10 =
43/5 * 4/10 =
43/5 * 2/5 =
86/25
86/25 - 3 7/10 =
86/25 - (3*10+7)/10 =
86/25 - (30 + 7)/10 =
86/25 - 37/10 =
172/50 - 185/50 =
-13/50
-20 - 6 * (-13/50) =
-20 - 3 * (-13/25) =
-20 + 3 * 13/25=
-20 + 39/25=
-500/25 + 39/25 =
-461/25
2)
1 1/9 - 5 1/3 =
(1*9 +1)/9 - (5*3+1)/3 =
(9+1)/9 - (15+1)/3 =
10/9 - 16/3 =
10/9 - 48/9 =
-38/9
-1/5 + 2,1 =
-1/5 + 21/10 =
-2/10 + 21/10 =
19/10
-38/9 : 19/10 =
-38/9 * 10/19 =
-2/9 * 10 =
-20/9