53×65+25×25 怎样简算?
问题描述:
53×65+25×25 怎样简算?
答
53×65+25×25
=28×65+25×65+25×25
=14×130+25×(65+25)
=1820+25×90
=1820+2250
=4070、、、、太长了!这简便吗?能短点吗?题目是这样,这样简便???