计算下面各题用脱式计算7⼀9-(1⼀6+4⼀9)

2025-04-15 01:36:51
推荐回答(1个)
回答1:

7/9-(1/6+4/9)
=7/9-4/9-1/6
=3/7-1/6
=(18一7)/42
=11/42