8.272.5+4.5的简便计算

8.272.5+4.5的简便计算
2024-12-01 22:28:19
推荐回答(1个)
回答1:

解:8.27+2.5+4.5
=8.27+7
=15.27

8.27-2.5+4.5
=8.27+2
=10.27