69×38+69×51+69×19用简便算法怎么算7×28+28

来源:学生作业帮助网 编辑:六六作业网 时间:2024/05/13 14:33:31
69×38+69×51+69×19用简便算法怎么算7×28+2869×38+69×51+69×19用简便算法怎么算7×28+2869×38+69×51+69×19用简便算法怎么算7×28+2869×3

69×38+69×51+69×19用简便算法怎么算7×28+28
69×38+69×51+69×19用简便算法怎么算
7×28+28

69×38+69×51+69×19用简便算法怎么算7×28+28
69×38+69×51+69×19
=69*(38+51+19)
=69*108
=7452

69×(38+51+19)

69*(38+51+19)=69*108=69*100+69*8=7472