Question

数学题要求简便计算（4分之5－2分之1乘3分之1）除以6分之5 7分之1乘13分之6加13分之8乘7分之113分之8除以

Answer 1

=(5/4-1/6)*6/5

=5/4*6/5-1/6*6/5

=3/2-1/5

=13/10

=1/7*(6/13+8/13)

=1/7*14/13

=2/13

=8/13*1/7+1/7*5/13

=1/7*(8/13+5/13)

=1/7*1

=1/7