多少
2/5ä¸3/7çååå»ä»ä»¬çå·®å¾å¤å°
2/5+3/7-ï¼2/5-3/7ï¼
=3/7+3/7
=6/7
5/6å ä¸1/2çååå»3/4å¾å¤å°
5/6+1/2-3/4
=4/3-3/4
=7/12
ä»14/15éé¢åå»1/12æ¶å¾çå·®å ä¸5/6åæ¯å¤å°
14/15-1/12+5/6
=17/20+5/6
=101/60
2/5+3/7-ï¼2/5-3/7ï¼
=3/7+3/7
=6/7
5/6å ä¸1/2çååå»3/4å¾å¤å°
5/6+1/2-3/4
=4/3-3/4
=7/12
ä»14/15éé¢åå»1/12æ¶å¾çå·®å ä¸5/6åæ¯å¤å°
14/15-1/12+5/6
=17/20+5/6
=101/60
温馨提示:答案为网友推荐,仅供参考
第1个回答 2012-06-30
2/5与3/7的和减去他们的差得多少
2/5+3/7-(2/5-3/7)
=3/7+3/7
=6/7
5/6加上1/2的和减去3/4得多少
5/6+1/2-3/4
=4/3-3/4
=7/12
从14/15里面减去1/12收得的差加上5/6和是多少
14/15-1/12+5/6
=17/20+5/6
=101/60
2/5+3/7-(2/5-3/7)
=3/7+3/7
=6/7
5/6加上1/2的和减去3/4得多少
5/6+1/2-3/4
=4/3-3/4
=7/12
从14/15里面减去1/12收得的差加上5/6和是多少
14/15-1/12+5/6
=17/20+5/6
=101/60