대전탄방중학교 중2 2021년 1학기 중간고사
수학 기출 시험지

1.

• ① $1.26666\cdots =1.2\dot{6}$
• ② $0.91111\cdots =0.91\dot{1}$
• ③ $2.452452\cdots =\dot{2}.4\dot{5}$
• ④ $2.838383\cdots =2.\dot{8}3\dot{8}$
• ⑤ $0.231231231\cdots =0.2\dot{3}\dot{1}$

2.

• ① ㄱ, ㄴ
• ② ㄱ, ㄷ
• ③ ㄱ, ㄹ
• ④ ㄴ, ㄷ
• ⑤ ㄷ, ㄹ

3.

• ① $1$
• ② $2$
• ③ $3$
• ④ $4$
• ⑤ $5$

4.

• ① ${\left(\frac{b}{a^2}\right)}^6=\frac{b^6}{a^8}$
• ② $a^3\times a^7=a^{21}$
• ③ $a^5÷a^2÷a^9=a^6$
• ④ $(a^2{)}^2÷(b^5{)}^2=a^4{b}^7$
• ⑤ $a^4\times b\times a\times b^2=a^5{b}^3$

5.

• ① $x-5y$
• ② $3x-y$
• ③ $x+5y$
• ④ $x-y$
• ⑤ $x+2y$

6.

• ① $-2$
• ② $-1$
• ③ $0$
• ④ $1$
• ⑤ $2$