3/11×8/9+1/13×2/9-1/13×1/9的简便算法
问题描述:
3/11×8/9+1/13×2/9-1/13×1/9的简便算法
这是小学五六年级的一道计算题 要求用简便算法计算 *^ο^*
答
3/11×8/9+1/13×2/9-1/13×1/9
=3/11×8/9+1/13×(2/9-1/9)
=24/11×1/9+1/13×1/9
=(24/11+1/13)×1/9
=323/143×1/9
=323/1287