几道数学题3.17乘4.5+5.5乘3.17简便计算怎么算?
问题描述:
几道数学题3.17乘4.5+5.5乘3.17简便计算怎么算?
3.17*4.5+5.5*3.171.25*3.2*2.5简便计算
答
3.17*4.5+5.5*3.17
=3.17x(4.5+5.5)
=3.17x10
=31.7
1.25*3.2*2.5
=1.25x8x0.4x2.5
=10x1
=10