2.1除以7/18怎么除
问题描述：
2.1除以7/18怎么除
答
2.1÷7/18
=2.1×18/7
=0.3×18
=5.4
2.1除以7/18怎么除
2.1÷7/18
=2.1×18/7
=0.3×18
=5.4