2.86×0.25+2.86×0.75=2.86×（0.25+0.75）=2.86
此算式运用乘法分配律可得，2.86×（0.25+0.75）=2.86×1=2.86
解：解这道题前，先要掌握好乘法分配律，然后就可以事半功倍了2.86x0.25+2.86x0.75=2.86×（0.25+0.75）=2.86×1=2.86
