35x68+68+6简便计算为:=35x68+68+6=35x68+35+35+4=35x70+4=2450+4=2454
用乘法分配律简算35×68+68×6=68×(35+6)=68×41=68×(40+1)=68×40+68×1=2720+68=2788
35×68+68+6=68×41=2788