2.9*0.45+0.29*4.2+0.029*13怎样简算
问题描述：
2.9*0.45+0.29*4.2+0.029*13怎样简算
答
2.9*0.45+0.29*4.2+0.029*13
=0.29*4.5+0.29*4.2+0.29*1.3
=0.29*(4.5+4.2+1.3)
=0.29*10
=2.9
小朋友,你该努力学习了
答
0.29x(4.5+4.2+1.3）=0.29x10=2.9
答
2.9*0.45+2.9*0.42+2.9*0.13=2.9*1=2.9
答
2.9*0.45+0.29*4.2+0.029*13
=2.9*(0.45+0.42+0.13)
=2.9*1
=2.9
答
2.9*0.45+0.29*4.2+0.029*13
=0.29*4.5+0.29*4.2+0.29*1.3
=0.29*(4.5+4.2+1.3)
=0.29*10
=2.9