1024乘625乘1331等于?(简便算法)
问题描述:
1024乘625乘1331等于?(简便算法)
答
1024x625x1331=64x(16x625)x11x11x11=64x10000x11x11x11=704x11x11x10000=7744x11x10000=85184x10000=851840000
注意一个数与11相乘是非常简单的,如:7744x11=7744x(10+1)=77440+7744=85184