分数简便运算数学题
问题描述:
分数简便运算数学题
简便计算:分数喔
十三分之七×二十九分之六+十三分之六×二十九分之二十二
答
7/13×6/29+6/13×22/29
=(6/13+1/13)×6/29+6/13×22/29
=6/13×(6/29+22/29)+1/13×6/29
=6/13×(1-1/29)+1/13×6/29
=6/13×1-6/13×1/29+(1/13×6)×(6/29÷6)
=6/13