37又84分之5-6.5-4又4分之1-21.625 (简便方法)

问题描述:

37又84分之5-6.5-4又4分之1-21.625 (简便方法)

=37-4-6.5-21+5/84-1/4-5/8
=5.5+10/168-42/168-105/168
=5.5-137/168
=924/168-137/168
=787/168