Exercise 1

Every shot hit the target.

1. Sketch

5、2、4、6

2. 1, 1, 2, 3, 4 and countless

3.( 1) Symmetry

(2) 1

(3)B′、2

(4)D、D’

(5)C, C', 3 or E, E', 5, etc. The answer is not unique.

Competitive fighting

Tuloue

Exercise 2

Every shot hit the target.

1. Translation, rotation, symmetry, translation

2.( 1)3

(2)2

(3)240

Step 3 sketch

Competitive fighting

Tuloue

Unit 1 Practice

I. 1, 2, 1, 1, 5

5, 4, 3, 1, countless

( 1)B(2)B(3)A

Three. sketch

(1) Translation and Rotation (2) 90

( 1)O

(2)90

(3)D

(4)90

(5)A, O, Shun, 270 or B, O, Shun, 180, etc. (The answer is not unique)

Verb (abbreviation for verb) sketch

Factors and multiples of the second unit

The first section factors and multiples

Exercise 1

Every shot hit the target.

1、( 1)6、7、42、7

(2) 1、2、3、5、6、 10、 15、30

(3) 1、45

(4)2、4 2、 1

(5)24

(6) times because

2、×√×√×√

Competitive fighting

2、6、7、4、4、8

Exercise 2

The factors of 1 and 10 are 1, 2,5 and 10 respectively.

The multiple of 10 is