4/9÷(5/6+1/2)×(7/8-5/16)
=4/9÷11/12×11/16
=4/9×12/11×11/16
=4/9×3/4
=1/3
=4/9÷11/12×11/16
=4/9×12/11×11/16
=4/9×3/4
=1/3
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第1个回答 2012-06-09
=4/9x12/15x9/16
=1/5
=1/5
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