1/1/36+1/45=36+1/45=(36*45)/45+1/45=1621/45=36,02222...
1)x+y-y+z-z-2=x-2
2)a+8-a-b+b-c=8-c
3)7-m+m+n-n+k=7+k
4)x-n+m-5-m+n=x-5
Правильно будет:
100,110,120,130,140,150,160,170,180,
190,200,210,220,230,240,250,260,
270,280,290,300,310,320,330,340,350,360,370,380