早教吧 育儿知识 作业答案 考试题库 百科 知识分享

56.9x0.47-13.5简便算怎么算

题目详情
56.9x0.47-13.5简便算怎么算
▼优质解答
答案和解析
56.9*0.47-13.5
=56.9*0.5-56.9*0.03-13.5
=28.45-1.707-13.5
=26.743-13.5
=13.243