The final question of the first mathematics midterm paper in 2008-2009 Better have an answer

The final question of the first mathematics midterm paper in 2008-2009 Better have an answer

Mathematics midterm test of grade one (volume one)
Class:________ Name:________ Score:_______
1、 Fill in the blanks (1 point for each blank, 30 points in total)
1. Cube is made up of____ It's surrounded by two faces. There are_____ Two vertices______ The edge. The cylinder is made up of_____ It's surrounded by two faces
2. If 5 ℃ above zero is recorded as + 5 ℃, then 3 ℃ below zero is recorded as + 5 ℃______ .
3. If a < 0, then a_____ 2A (fill in the blanks with ＜, ＞, = and)
4. In 74, the base number is_______ The index is_______ In (- 2) 3, the base number is________ The index is______ .
⒌(－1)2000＝__________ ,(－1)2001＝___________ ,－12002＝_____________ .
15% of a minus 70 can be expressed as______________ .
⒎ if the side length of the cube is a, then the volume of the cube is a________ And the surface area is_______ .
8. A two digit single digit is a and a ten digit is B. please use algebraic expression to express the two digit is a__________________ .
The three sides of the triangle are 2x, 4x and 5x respectively. The perimeter of the triangle is___________ .
⒑ among the three consecutive even numbers, n is the smallest, and the sum of the three numbers is_________ .
⒒ please explain the meaning of the following algebraic expressions:
6P：________________________________
a2－b2：_______________________________ .
25a＋12b：_________________________________ .
(3) if the price of a commodity is x yuan, then 1 / 2x can be interpreted as______________________ .
12、(1) 0.25°＝_____ ′_____ 〃 (2) 1800〃＝_____ ′_____ °
And circumference =_______ Flat angle =________ Right angle =_______ degree
2、 Judgment questions (1 point for each question, 6 points in total)
1. Rational numbers are divided into positive numbers and negative numbers
2. The absolute value of rational number must be greater than 0
3、－(3x－2)＝－3x－2 ( )
4、8x＋4＝12x ( )
5、3(x＋8)＝3x＋24 ( )
6、3x＋3y＝6xy ( )
Choice (2 points for each sub question, 12 points in total)
1. If | a | = 4, then a = ()
A. 4 B, - 4 C, 4 or - 4 D, none of them
2. The reciprocal of - 3 / 8 is ()
A、－3/8 B、8/3 C、－8/3 D、3/8
3. The number n is reduced by 3 and expanded by 5 times, and the final result is ()
A、n－3×5 B、5(n－3) C、n－3＋5n D、5n－3
4. There are a total of a students in a class, of which 35% are boys, so the number of girls is ()
A、35%x B、(1－35%)x C、x/35% D、x/1－35%
5. The shape symbol ()
A.B.C.D.
3、 Calculation (3 points for each sub question, 12 points in total)
1、(1/3＋1/4－1/6)×24
2、0－23÷(－4)3－1/8
3、(－2)3×0.5－(－1.6)2/(－2)2
4、23÷[(－2) 3 －(－4)]
4、 Simplify the following forms (3 points for each sub question, 12 points in total)
1、2(2a2＋9b)＋3(－5a2－4b)
2、a＋(5a－3b)－(a－2b)
3、3n－[5n＋(3n－1)]
4、a－(5a－3b)＋(2b－a)
5、 Simplify first, then evaluate (5 points for each question, 10 points in total)
1. (3a2 + 7bc-4b2) - (5a2-3bc-2b2) + ABC, where a = 5, B = 1 / 3, C = 3
2. (5a2-3b2) + [(A2 + B2) - (5A2 + 3B2)], where a = - 1, B = 1