4.29+7.8+12.2简便计算?

2025-03-07 03:40:02
推荐回答(2个)
回答1:

原式=4.29+(7.8+12.2)
=4.29+20
=24.29
希望采纳,谢谢!

回答2:

=4.92+(7.8+12.2)
=4.92+20
=24.92