8⼀15+0.8×1⼀8用简便方法怎么做?

2025-04-06 23:19:21
推荐回答(1个)
回答1:

8/15+0.8×1/8
=8/15+4/5x1/8
=8/15+1/10
=16/30+3/30
=19/30