几道数学题3.17乘4.5+5.5乘3.17简便计算怎么算?
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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
3.17*4.5+5.5*3.171.25*3.2*2.5简便计算
![几道数学题3.17乘4.5+5.5乘3.17简便计算怎么算?](/uploads/image/z/2729084-68-4.jpg?t=%E5%87%A0%E9%81%93%E6%95%B0%E5%AD%A6%E9%A2%983.17%E4%B9%984.5%2B5.5%E4%B9%983.17%E7%AE%80%E4%BE%BF%E8%AE%A1%E7%AE%97%E6%80%8E%E4%B9%88%E7%AE%97%3F)
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
=3.17x(4.5+5.5)
=3.17x10
=31.7
1.25*3.2*2.5
=1.25x8x0.4x2.5
=10x1
=10