Also known as "decimal logarithms". With 10 as the bottom logarithms, indicated by the symbol "lg". For example, lgA means A logarithms with a base of 10, where A is the true number. Any positive number use logarithms can be expressed as one integer and one positive pure decimal (or zero) and; the integer part is called logarithms "first number", the positive pure decimal (or zero) is called logarithms "last number"; the integer part is called logarithms "first number", the positive pure decimal (or zero) is called logarithms "last number". The integer part is called the logarithms "firsts", and the positive pure decimals (or zeros) are called logarithms "lasts". use logarithms is available in the logarithms table.

The logarithms table is available for use logarithms.

Express one positive number in scientists notation as one containing one integer decimal and 10's of integer power products formality and then take use logarithms

e.g.: lg200=lg(10^2*2)=lg10^2+lg2=2+0.3010

lg20=lg(10^1*2)=lg10^1+lg2=1+0.3010