1,2,3,11,12,13,21,22,23,31,32,33,41,42,43,51,52,53
合数:
质数:
偶数:
奇数:
按要求填一填
2,47,49,56,99,121,133,201,93,100,156,73,89,79,102,4
既是奇数又是偶数:
既是偶数又是质数:
既是奇数又是合数:
既是偶数又是合数:
參考答案:合数:12,21,22,32,33,42,52,
质数:1,2,3,11,13,23,31,41,43,51,53
偶数:2,12,22,32,42,52,
奇数:1,3,11,13,21,23,31,33,41,43,51,53
既是奇数又是偶数:?没有
既是偶数又是质数:2
既是奇数又是合数:49,99,121,201,93
既是偶数又是合数:56,100,156,102,4