lg200+lg5怎么算,

lg200+lg5怎么算, lg8+lg5*lg200+lg5*lg5怎么算,急. (1)lg5+1g20= (2)lg200-1g2= lg5×lg5怎么解? lg5*lg7怎么算,乘 lg5乘lg20怎么算 数学lg5/lg8怎么算 （lg5)2平方怎么算 (lg5)^2+lg2lg50怎么算? (lg2)^3+(lg5)^3+lg5*lg8怎么算谢谢! (lg2)^3+(lg5)^3+3lg2*lg5怎么算RT (lg2)^3+(lg5)^3+lg5*lg8怎么算谢谢! (lg2)^3+3lg2·lg5+(lg5)^3 怎么算? (lg2)^3+(lg5)^3+3lg2*lg5 这些怎么算. (lg2)³+(lg5)³+3lg2×lg5(怎么算呀, (lg2)^3+3lg2·lg5+(lg5)^3 怎么算? 那个...(lg5)^2+(lg2)lg50怎么算在下刚学对数,虽然看了个答案但还是不明白（lg2)lg50怎样变成(1-lg5)(lg5+1)原解题过程如下：(lg5)^2+(lg2)lg50=(lg5)^2+(lg2)lg5*10=(lg5)^2+(1-lg5)(lg5+1)=(lg5)^2+[1-(lg5)^2]=1 ------------- lg20*lg5等于多少,怎么算的?