一道乘法公式计算题
问题描述:
一道乘法公式计算题
1.2345²+0.7655²+2.469×0.7655
答
原式=1.2345*1.2345+(0.7655+2.469)*0.7655=1.2345*1.2345+3.2345*0.7655=1.2345*1.2345+1.2345*0.7655+2*0.7655=1.2345*(1.2345+0.7655)+2*0.7655=1.2345*2+2*0.7655=2*(1.2345+0.7655)=4