8.1-0.77+1.9-0.23怎样简便计算

8.1-0.77+1.9-0.23怎样简便计算
2025-04-08 15:28:31
推荐回答(1个)
回答(1):

8.1-0.77+1.9-0.23
=8.1+1.9-(0.23+0.77)
=10-1
=9
————————————————————————