2.1x2.5x0.4x22的简便算法是什么

2025-06-22 00:27:33
推荐回答(1个)
回答1:

=2.5*0.4*(2.1*22)
=1*(2+0.1)*22
=1*2*22+0.1*22
=44+2.2
=46.2