6又9分之2除以2又3分之1再减0.625再乘以1又3分之1这题怎么做谢谢
2016-10-21
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[(6又2/9)÷(2又1/3)-0.625]×(1又1/3)
=[(56/9)÷(7/3)-5/8]×(4/3)
=(56/9×3/7-5/8)×4/3
=(8/3-5/8)×4/3
=49/24×4/3
=49/18
=[(56/9)÷(7/3)-5/8]×(4/3)
=(56/9×3/7-5/8)×4/3
=(8/3-5/8)×4/3
=49/24×4/3
=49/18
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