関連ワード:  is 4 2 3 a rational number    is 2 3 a rational number    is 2 3 4 5 a rational number    is 1 2 3 4 rational numbers    2/3+4/5 is a rational number true or false    is 2 3 4 a rational or irrational number    2 3 4 5 is not a rational number true or false    2 3 4 5 is not a rational number    is 3 2 a rational number between 3 and 4    prove that 2 3 4 is a rational number