3.9 +(1.3×5)的简便计算?

2025-04-18 12:29:40
推荐回答(2个)
回答1:

你好!
解:3.9+(1.3×5)
=4-0.1+4.5
=4+4.5-0.1
=8.5-0.1
=8.4

回答2:

=1.3×(5+3)
=10.4