简便计算过程方法如下解:2.9×6.7+6.7×8.1-6.7=(2.9+8.1-1)x6.7=10x6.7=67
简便计算2.9×6.7+6.7×8.1-6.7=(2.9+8.1-1)x6.7=10x6.7=67