2. Needless to say. (Guess the math noun 1)

3. Go in and count. (Guess the math noun 1)

4. cross the river and answer. (Guess the math noun 1)

5. Do it again. (Guess the math noun 1)

6. Recruit actors. (Guess the math noun 1)

Seven, eighteen catties. (Guess the math noun 1)

8. Department of Medicine. (Guess the math noun 1)

9. Ask someone to do things. (Guess the math noun 1)

10, review. (Guess the math noun 1)

1 1, what everyone looks like. (Guess the math noun 1)

12, small house. (Guess the math noun 1)

13, piece. (Guess the math noun 1)

14, let's express our opinions. (Guess the math noun 1)

15, counting from the back. (Guess the math noun 1)

16, north. (Guess the math noun 1)

17, the sword goes through the overlord of Chu. (Guess the math noun 1)

18, counting letters. (Guess the math noun 1)

19, go up the stairs. (Guess the math noun 1)

20. Admission by merit. (Guess the math noun 1)

2 1, calculate the rotating rod. (Guess the math noun 1)

22, inaccurate. (Guess the math noun 1)

23. Five cents. (Guess the math noun 1)

24. Stand by and watch (guess the math noun 1)

25. Small business. (Guess the math noun 1)

26. Grandpa is wrong. (Guess the math noun 1)

Answer;

1, identity 10, logarithm 19, sequence

2. The methods of 1 1, formula 20 and 0. 18 are known.

3. Operation 12, interval 2 1, number axis

4, corresponding to 13, difference 22, error

5. Complex number 14, discussion 23, five cents

6. Complementary angle 15, reciprocal 24, arithmetic difference

7, analysis 16, inverse ratio 25, WeChat business.

8. Formula 17, General Item 26, Tolerance

9. For 18, the function