答案是1
算法如下
=lg12.5-(lg5-lg8)+lg1-lg2
=lg12.5-lg5+lg8+lg1-lg2
=lg(12.5/5)+lg(8/2)
=lg2.5+lg4
=lg(2.5*4)
=lg10
=1
计算：lg12．5-lg8分之5+lg2分之1=?
答案是1
算法如下
=lg12.5-(lg5-lg8)+lg1-lg2
=lg12.5-lg5+lg8+lg1-lg2
=lg(12.5/5)+lg(8/2)
=lg2.5+lg4
=lg(2.5*4)
=lg10
=1