関連ワード:  is zero negative rational number    is 0 negative rational number    is zero positive or negative rational number    zero is a negative rational number true or false    is 0 /- 3 a negative rational number    zero is dash positive negative rational number    is 0 /- 7 a negative rational number    zero is greater than every negative rational number    zero is neither positive nor negative rational number    zero is greater than any negative rational number