1-13/14×7/9-2/9÷14/13(简便计算)

问题描述:

1-13/14×7/9-2/9÷14/13(简便计算)

=1-13/14×7/9-2/9×13/14
=1-13/14×(7/9+2/9)
=1-13/14×1
=1-13/14
=1/14