純じゅん小しょう数すうMeanings1nounpure decimal; decimal with zero integer partmathematicsMathematical term for a decimal number whose integer part is zero, e.g., 0.123.0.5は純じゅん小しょう数すうです。0.5 is a pure decimal.純じゅん小しょう数すうは整せい数すう部ぶ分ぶんがゼロの小しょう数すうを指さします。A pure decimal refers to a decimal whose integer part is zero.