2.9X0.45+0.29X4.2+0.029ᠧ13

2025-04-27 20:17:33
推荐回答(3个)
回答1:

=2.9*0.45+2.9*0.42+2.9+0.13
=2.9*(0.45+0.13+0.42)
=2.9*0.1
=0.29

回答2:

 

回答3:

697.5254 求采纳