All floating point integer operations with values smaller than 252 are exact. Most floating point operations with small values with few significant figures are

All floating point integer operations with values smaller than 252 are exact. Most floating point operations with small values with few significant figures are precise. Fraction, and there are fractions like 1/10 that cannot be represented precisely in base two, much like 1/3 cannot be represented precisely in base 10. Beyond that, there's the usual issue of pushing out the least significant bits, but that's insurmountable while working in finite precision.