15+(59-36)=15+23=38
(47+42)-68=89-68=21
41-(73-32)=41-41=0
(72+16)+10=88+10=98
А(5;0)
В(0;-4)
С(0;5)
D(-5;0)
E(-2;1)
F(3;3)
G(3;-2)
H(7;-3)
K(-4;-3)
L(-5;5)
N(6;6)
3) 10 11/24 - 8 19/36 = 10 33/72 - 8 38/72 = 9 105/72 - 8 38/72 = 1 67/72
4) 9 1/6 - 5 3/4 = 9 2/12 - 5 9/12 = 8 14/12 - 5 9/12 = 3 5/12
22 25 27 52 55 57 72 75 77