Calculations of powers and roots are reduced to multiplications or divisions and look-ups by Many logarithm tables give logarithms by separately providing the characteristic and mantissa of `` x '' , that is to say , the integer part and the fractional part of log10 ( `` x '' ) .
Many logarithm tables give logarithms by separately providing the characteristic and mantissa of `` x '' , that is to say , the integer part and the fractional part of log10 ( `` x '' ) .