原题应该是:64x38+64x68-64x6简便计算如下:64x38+64x68-64x6=64x（38+68-6）=64x（106-6）=64x100=6400
64×38+64×68-64×6=64×(38+68-6)=64×100=6400
你好！64x38+64x68-64x6简便计算：64x38+64x68-64x6=64x（38+68-6）=64x100=6400
