1) х=45580+3540
х=49120
2) х=94817-24085
х=70732
3)х=36048*6
х=216288
4)х=57083-9075
х=48008
<span>
13+
39+
117+
117=
286
............................................ </span>
180 : 30 = 180 : 10 : 3 = 6
2100 : 30 = 2100 : 15 : 2 = 70
2400 : 300 = 2400 : 30 : 10 = 8
72 000 : 900 = 72 000 : 90 : 10 = 80
111^2a = 555^2 - 111^2
a = (555^2 - 111^2)/111^2
a = (308025 - 12321)/ 12321
a = 295704/ 12321
a = 24