1ã 6/5*ï¼-1/3-1/2ï¼/5/4
=6/5*-5/6/5/4
=1/5/4
=4/5
2ã5/7/ï¼-2 2/5âï¼-5/7*5/12-2/3/4
=5/7*-5/12-5/7*5/12-2/3*1/4
=5/7*ï¼-5/12-5/12ï¼-1/6
=25/42-1/6
3/7
3ã=0.8*ï¼2/11++9/11ï¼+24/5*-2/7-11/5*3/7
=4/5+1 26/55
=1 37/55
ï¼å çè¿ä¹å¤ï¼çä½ é纳ï¼è¿½é®ï¼æåæ¥ç大ï¼è¿½é®
=6/5*-5/6/5/4
=1/5/4
=4/5
2ã5/7/ï¼-2 2/5âï¼-5/7*5/12-2/3/4
=5/7*-5/12-5/7*5/12-2/3*1/4
=5/7*ï¼-5/12-5/12ï¼-1/6
=25/42-1/6
3/7
3ã=0.8*ï¼2/11++9/11ï¼+24/5*-2/7-11/5*3/7
=4/5+1 26/55
=1 37/55
ï¼å çè¿ä¹å¤ï¼çä½ é纳ï¼è¿½é®ï¼æåæ¥ç大ï¼è¿½é®
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