関連ワード:  is negative 5 a rational number    is minus 5 a rational number    is negative 2 5 a rational number    is negative 3 5 a rational number    is negative 4 5 a rational number    is negative 1 5 a rational number    is negative 5 8 a rational number    is negative 5 6 a rational number    is negative 51 5 a rational number    is negative 15 5 a rational number