
(2又2/9+3又4/7+1又4/11)除以(3/11+5/7+4/9)
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(2又2/9+3又4/7+1又4/11)除以(3/11+5/7+4/9)
=(3/11+5/7+4/9)/(20/9+25/7+26/11)
=(189/693+495/693+308/693)x(1540/693+2475/693+1638/693)
=(992/693)/(5653/693)
=992/5653
=(3/11+5/7+4/9)/(20/9+25/7+26/11)
=(189/693+495/693+308/693)x(1540/693+2475/693+1638/693)
=(992/693)/(5653/693)
=992/5653
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