Middle school students urgently need to learn the answers of Zhejiang teaching in the seventh grade mathematics weekly of the newspaper! ! ! ! !

1 C2 a3 a 4 C5 c 6 a 7 b 8 a9 b 10a 1 1d 12A

Middle school students learn the answer to the 42 nd question of seventh grade mathematics

Sunrise at 65438 hours on April 9, 2007

Square root 1

1.0.3, 0.0081.2.4 3.54-6.dcc7.1.3,2, so 5/3 8. The root number 5 is about 2.2.

Square root 2

1.3.32 , 16.06 2.3. 16 3.0 4-6.BDC 7。 M=5 8。 2

Square root 3

1. plus or minus 1.3,-1.2. 7 3.3+ radical number 5 or 3- radical number 5 4-6. Japan Business Bureau (Better Business Bureau)

7.A= 1，X = 4 ^ 8。 ( 1) 1.73， 1. 14， 1.29， 1.22 (2)P>Q