1) m-(2/11)m=(11/11)m-(2/11)m=(9/11)m
(9/11)m=9.9
(9/11)m=99/10
(1/11)m=11/10
m=(11*11)/10
m=121/10
m=12.1
2) (8/9)S=360
S=360*(9/8)
S=45*9
S=405
3) (100%-85%)*L=18
15%*L=18
(15/100)L=18
(3/20)*L=18
(1/20)*L=6
L=120
А) 2 3/4 - 1 5/6 = 2 9/12 - 1 10/12 = 9/12 = 3/4. Б) 4 2/5 + 3 5/6 = 4 12/30 + 3 25/30 = 7 37/30 = 8 7/30. В) 7 5/12 - ( 1 5/8 + 2 1/24) = 7 5/12 - ( 1 15/24 + 2 1/24) = 7 5/12 - 3 16/24 =. 7 5/12 - 3 8/12 = 6 9/12 = 6 3/4