3.42+1.98-0.42+2.02怎么简便计算

3.42+1.98-0.42+2.02怎么简便计算
2025-04-28 21:01:35
推荐回答(1个)
回答1:

=(3.42-0.42)+(1.98+2.02)
=3+4
=7