Mathematics originated in the early days of mankind. Babylonians in Cuba have accumulated some mathematical knowledge since ancient times and can apply practical problems. The following is the answer to my summer homework in Book 2 of Grade One Mathematics. I hope everyone will read it carefully!
Exercise 1
Fill in the blanks
60? The isosceles angles are equal and the two straight lines are parallel.
The vertex angles are equal, 1 2 a b is equal, and the two lines are parallel.
35?
50?
140?
80?
Second, multiple choice questions
ABAAA
Third, the application problem.
The first question was omitted. There are too many processes to type.
2、? DEF= 125？
3、? EGB=55？ ,? HGQ=35？
There seems to be a typo in the fourth question. Can't find it? 1? 2 Where is it? .
Exercise 2
Fill in the blanks
The shape and area are parallel and equal.
5 7 72
6 4 8
BD DC BC
BAE CAE BAC
AFB AFC
Second, multiple choice questions
ABBD
Third, the application problem.
1, three, △ABD, △BCD, △ABC
2、5 1
3. (1) 54 > BC & GT30 (2) 24 > BC>6
4、? 1= 1 14? ,? DBE=29？
There is still a mistake in the fifth question here. What was the last sentence? Has the size changed? What size does it mean? So don't do this problem.
Exercise 3
Fill in the blanks
24
85?
40?
100? 140?
eight
12
Second, multiple choice questions
BDDBB
Third, the application problem.
1、? ADC= 108？
2、? ACB= 1 10？
3. The area of △ BEF = 3
4, 1 1 edge
The fifth question has many processes. . So it's abbreviated.
6. The first little question is the same as above, and the second little question? BAC+？ BHE= 180？
Exercise 4
First, multiple choice questions
DCCCD
Second, the calculation problem
-x^3
- 1/64x^6y^ 12z^ 18
y^3
y^ 13
1.44? 10^ 18
-(x-y)^3
Third, the application problem.
1, can be used as 5? 10 12 operation.
2. Ten seconds later, the volume is 8? 10^ 12.
3 、( 1)x=3 (2)x=3
4 、( 1)pq (2)p^2q^3
Exercise 5
First, multiple choice questions
BDBBC
Second, the calculation problem
a^6b^3
nine
- 1/x^3
-(b-a)^4
Third, the application problem.
1 is 50 times.
2、7/8
3、-(x+y)^6n+ 1
4、 1 1
5、( 1)x^2 (2)y=x^2+2
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