简便计算2.9x4.5 0.29x0.42 0.029x13怎样计算

2024-12-02 13:31:56
推荐回答(1个)
回答(1):

2.9*4.5+0.29*0.42+0.029*13
=0.29*45+0.29*0.42+0.29*1.3
=0.29*(45+0.42+1.3)
=0.29*46.72
=13.5488