Question

8分之13减6分之5乘8分之3 (7分之6减3分之1)除以21分之4的简便方法怎

Answer 1

13/8-5/6*3/8

=13*6/48-15/48

=(78-15)/48

=63/48=21/16

(6/7-1/3)*4/21

=(18/21-7/21)*4/21

=11/21*4/21

=44/441