5.1 before and after

5.2 up and down

Around 5.3

5.4 Classroom

6.1 Understanding graphics

6.2 I say you do it

2.1 Take a look (1)

2.2 Take a look (2)

4.1 Understanding graphics

4.2 Do it yourself (1)

4.3 Do it yourself (2)

4.4 Do it yourself (3)

4.1 fold, fold, do it

4.2 Have fun and do it

6.1 How long is the classroom?

6.2 How long is the desk?

6.3 How long is 1 meter?

2.1 Southeast, Northwest

2.2 Identify the direction

4.1 How long is a pencil?

4.2 How long is 1 kilometer?

6.1 Understanding Corner (1)

6.2 Understanding Corner (2)

6.3 Understanding right angles

6.4 Rectangle and Square

6.5 Parallelogram

6.6 Appreciation and design

6.7 Exercise 5

2.1 Take a look (1)

2.2 Take a look (2)

5.1 What is perimeter?

5.2 Perimeter of rectangle

2.1 Axial symmetry (1)

2.2 Axial symmetry (2)

2.3 Translation and rotation (1)

2.4 Translation and rotation (2)

5.1 What is area?

5.2 Area unit

5.3 Area of ​​rectangle (1)

5.4 Area of ​​rectangle (2)

5.5 Conversion of area units

5.6 Exercise 4

2.1 Understanding of the line

2.2 Intersection and perpendicularity

2.3 Translation and parallelism

2.4 Rotation and angle

2.5 Measurement of angles (1)

2.6 Measurement of angles (2)

5.1 Go to the library

5.2 Determine location

2.1 Graphic classification

2.2 Triangle classification

2.3 Sum of the interior angles of a triangle (1)

2.4 Sum of the interior angles of a triangle (2)

2.5 Triangular relationship

2.6 Classification of quadrilaterals

2.4 Exercise 2

4.1 Take a look

4.2 I told you to ride with me

4.3 Take a ride

4.4 Exercise 4

2.1 Re-understanding of axial symmetry (1)

2.2 Re-understanding of axial symmetry (2)

2.3 Translation

2.4 Appreciation and Design

4.1 Compare the areas of figures

4.2 Understand low and high

4.3 Area of ​​parallelogram

4.4 Area of ​​triangle

4.5 Area of ​​trapezoid

6.1 Area of ​​combined graphics

6.2 Area of ​​irregular figures

6.3 hectares, square kilometers

2.1 Understanding of cuboid (1)

2.2 Understanding of cuboid (2)

2.3 Expand and fold

2.4 Surface area of ​​cuboid

2.5 The exposed face

2.6 Exercise 2

4.1 Volume and volume

4.2 Volume units

4.3 Volume units (2)

4.4 Volume of cuboid

4.5 Volume of cuboid (2)

4.6 Conversion of volume units

4.7 Interesting measurements

4.8 Exercise 4

6.1 Determine the location (1)

6.2 Determine the location (2)

1.1 Understanding of circles

1.2 Symmetry of a circle

1.3 Appreciation and design

1.4 Circumference of a circle

Area of ​​1.5 circles (1)

1.6 Area of ​​a circle (2)

3.1 Building block competition

3.2 Scope of observation

3.3 Tiananmen Square

1.1 Rotation of surfaces (1)

1.2 Rotation of faces (2)

1.3 Surface area of ​​cylinder (1)

1.4 Surface area of ​​cylinder (2)

1.5 Volume of cylinder (1)

1.6 Volume of cylinder (2)

1.7 Volume of a cone

1.8 Exercise 1

3.1 Rotation of graphics (1)

3.2 Rotation of graphics (2)

3.3 Movement of graphics

3.4 Appreciation and design

3.5 Exercise 3