18쪽익힘문제)1④,⑤2③3⑤4a=7,b=25②6{2},{4},{6},{2,4},{2,6},{4,6},{2,4,6},7개7ㄱ,ㄴ,ㅁ,ㅅ,ㅇ8③94개//20쪽)1①2④3)4,4)3,5④6-5개7-①8-8개
당신은 어느 그룹입니까?