早教吧 育儿知识 作业答案 考试题库 百科 知识分享

五年级数学简便运算题67.2x7.5+67.2x7.5五年级数学简便运算题67.2x7.5+6。72x7.5

题目详情
五年级数学简便运算题67.2x7.5+67.2x7.5
五年级数学简便运算题67.2x7.5+6。72x7.5
▼优质解答
答案和解析
67.2x7.5+67.2x7.5
=67.2x7.5×2
=67.2x15
=1008
67.2x7.5+6.72x7.5
=(67.2+6.72)x7.5
=73.92×7.5
=554.4