如题所述
åå¼
=5/9x16/9+2/9x5/9
=5/9x(16/9+2/9)
=5/9x18/9
=5/9x2
=10/9
=1å1/9
å ¶ä¸ï¼/æ¯åæ°çº¿ã
ä¾åèã
=5/9x16/9+2/9x5/9
=5/9x(16/9+2/9)
=5/9x18/9
=5/9x2
=10/9
=1å1/9
å ¶ä¸ï¼/æ¯åæ°çº¿ã
ä¾åèã
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第1个回答 2016-04-30
将5/9提出来，即5/9(16/9+2/9)=5/9*2=10/9
