Question

1除以（8又4分之1-（8.5-4减以4乘1又8分之7）简便算法

Answer 1

1/(8又(1/4)-(8.5-4-(4*(1又(7/8))))

=1/(33/4-(4.5-(4*15/8)))

=1/(33/4-(4.5-60/8))

=1/(33/4-(36-60)/8)

=1/(33/4-(-24/8))

=1/(33/4+3)

=1/((33+12)/4)

=1/(45/4)

=4/45