вычисли.1251•(4•5),2452•(2•5),96 300:(3•3),9810:(3•30),5•3142•4,21 032•5•6,15•2•12013,3021•(2•5)

1251•(4•5)=1251•20=250202452•(2•5)=2452•10=2452096300:(3•3)=96300:1=963009810:(3•30)=9810:90=1095•3142•4,21032•5•6,15•2•12013,3021•(2•5)==488684770049,57