但愿不是你抄错题了!
原式=45x(100+2)-46x2=4500+45*2-46*2=4500-2=4498
45×102-46×2
=(46-1)x102-46x2
=46x102-102-46x2
=46x102-46x2-102
=46x(102-2)-102
=46x100-102
=4600-102
=4498。
=45×102-(45+1)×2
=45×102-45×2-2
=45×(102-2)-2
=4500-2
=4498
=45*102-(45+1)*2
=45*102-45*2-1*2
=45*(102-2)-2
=45*100-2
=4500-2
=4498