関連ワード:  is 5/8 a rational number    is 5 8 a rational number    is 5 3 8 a rational number    is negative 5 8 a rational number    is 7 5 8 a rational number    is 1 5 8 a rational number    is 2 5 8 a rational number    is 4 5 8 a rational number    is 5 8 a rational or irrational number    is 8 5/12 a rational number