简便计算过程方法如下解:102x85=(100+2)×85=100×85+2×85=8500+170=8670
102*85=(100+2)*85 =100*85+2*85 =8500+170 =8670
102x85=(100+2)x85=100x85+2x85=8500+170=8670
85×102 =(100+2)×85=100x85+2X85=8500+170=8670
=(100×2)×85