1、C

2、D

3、C

4.B( 1 and 64)

5、C

6. A.

fill-in-the-blank question

7、 3、-3、 √3

8、-2

9,49 (2a-3+5-a = 0, a=-2, square root of x = 7, x=49)

10、 8

Computational problem

(1) Original formula = 8+0- 1/4 = 3 1/4.

(2) The original formula = (√ 2-1)+(√ 3-√ 2)+(2-√ 3) = 2-1=1.

Please ask questions that require a detailed process.