2.1除以7/18怎么除

2.1除以7/18怎么除
2.1除以7/18怎么除

2.1除以7/18怎么除
2.1÷7/18
=2.1×18/7
=0.3×18
=5.4

2.1/(7/18)
=21/10*18/7
=27/5

21/10*18/7=27/5

=2.1*(18/7)
=0.3*18
=5.4
=27/5

2.1的分数是21/10
再就是21/10乘以18/7
得出是27/5 约等于5.4
祝你今年考德上！