대전봉우중학교 중2 2021년 1학기 중간고사
수학 기출 시험지

1.

• ① $0.11212\cdots =0.\dot{1}\dot{2}$
• ② $0.76777\cdots =0.\dot{7}6$
• ③ $1.322222\cdots =1.\dot{2}$
• ④ $1.414141\cdots =\dot{1}.\dot{4}$
• ⑤ $2.345345\cdots =2.\dot{3}4\dot{5}$

2.

• ① $0.83$
• ② $0.8\dot{3}$
• ③ $0.\dot{8}\dot{3}$
• ④ $1.2$
• ⑤ $1.\dot{2}$

3.

• ① $-\frac{12}{75}$
• ② $-\frac{21}{140}$
• ③ $\frac{3}{2^3\times 5}$
• ④ $\frac{3}{2\times 15}$
• ⑤ $\frac{3}{2\times 33\times 5^2}$

4.

• ① $\frac{43}{225}$
• ② $\frac{172}{1000}$
• ③ $\frac{86}{495}$
• ④ $\frac{19}{110}$
• ⑤ $\frac{172}{999}$

5.

• ① $9$
• ② $11$
• ③ $12$
• ④ $15$
• ⑤ $16$

6.

• ① $100x-x$
• ② $1000x-x$
• ③ $100x-10x$
• ④ $1000x-10x$
• ⑤ $1000x-100x$