ç¨ç®ä¾¿æ¹æ³è®¡ç®åé¢åæ°çé¢
1/5+5/6+4/5
=ï¼1/5+4/5ï¼+5/6
=1+5/6
=1å5/6
7/9-1/7-2/9
=ï¼7/9-2/9ï¼-1/7
=5/9-1/7
=25/63
2/15+4/21+7/15+2/21
=ï¼2/15+7/15ï¼+ï¼4/21+2/21ï¼
=3/5+2/7
=31/35
2/3-1/2+2/3-1/2
=ï¼2/3+2/3ï¼-ï¼1/2+1/2ï¼
=4/3-1
=1/3
5/12+ï¼1/12-2/5ï¼
=ï¼5/12+1/12ï¼-2/5
=1/2-2/5
=1/10
2/15+ï¼2/5-1/15ï¼-1/5
=ï¼2/15-1/15ï¼+ï¼2/5-1/5ï¼
=1/15+1/5
=4/15
温馨提示:内容为网友见解,仅供参考