14分之11除以 9又4分之1×6又7分之2-6又七分之二×7又7分之1的差
=11/14÷[(9+1/4)*(6+2/7)-(6+2/7)(7+1/7)] 对吗?
=11/14÷{[(9+1/4)-(7+1/7)]*(6+2/7)}
=11/14÷{[9+1/4-7-1/7]*(6+2/7)}
=11/14÷{[9-7+7/28-4/28]*(6+2/7)}
=11/14÷{[2+3/28]*(6+2/7)}
=11/14÷{[59/28]*(44/7)}
=11/14÷{[59/7]*(11/7)}
=11/14÷(649/49)
=11/14*(49/649)
=1/2*7/59
=7/118