Understanding the east, south, west and north directions in 1 class ... 5

The second class draws a floor plan ... 6

Look at the simple road map of the third lesson (1) ... Seven

The fourth lesson is to know the southeast, northeast, southwest, northwest ... 8

Look at the simple road map in the fifth class (2)... 10

The divisor of the second unit is the division of one digit ... 1 1.

1 oral calculation of dividing a class of one digit by integer ten, integer hundred and hundredth ... 1 1

Estimation of division in the second category ... 13

The third class oral arithmetic practice class ... 15

The fourth class, a number divided by two digits, and then divided by two digits ... 16

The fifth class is the practice class of writing division ... 18

In the sixth class, divide three digits by one digit ... 19

The seventh class, the comprehensive practice class, is divided by one digit ... 20

Lesson 8 Checking Calculation of Division ... 2 1

Lesson 9 Division Check Exercise ... 23

10 (1) division with zero in the middle and zero at the end of quotient ... 24

In class 1 1 (2), division with zero in the middle of quotient and zero at the end ... 25

12 division exercise with zero quotient ... 27

Finish and review lesson 13 (divisor is the division of a single digit) 28

Unit 3 Overall Planning ... 30

Bar chart of the first kind (1)...3 1

Bar chart of the second kind (2) 32

Average number of third class hours ... 33

The application of the fourth kind of average ... 34

Unit 4 Year, Month and Day 36

Year, month, day ... 38

24-hour timing method (P52-53)...40

Unit 5 Multiplication of Two Numbers ... 42

The first lesson: oral multiplication ... 42

Category II: Multiplication estimation of two digits by two digits ... 44

The third class: comprehensive exercises ... 46

The fourth lesson: written multiplication (no carry) ... 47

Lesson 5: Carry-Free Multiplication Practice ... 49

Lesson 6: Writing Multiplication (Carry) ... 50

The seventh lesson: the practice of writing multiplication ... 5 1

The eighth class: sorting out and reviewing ... 52

Unit 6 Area ... 53

The first type of area and area unit ... 54

Comparison between Area Units and Length Units of Category II ... 57

Calculation of rectangular and square areas in the third category ... 58

Application of area calculation of rectangle and square in the fourth category ... 60

The fifth lesson is the calculation exercise of rectangle and square area ... 6 1

Progress between regional units in the sixth category ... 62

Category VII, hectares, square kilometers ... 64

Completion and review of the eighth class ... 65

Seven. A preliminary understanding of decimals 66

How to read and write decimals in the first class ... 67

Comparison of the second decimal size ... 69

The third class practice class ... 70

Lesson 4 Simple addition and subtraction of decimals ... 72

The fifth class practice class ... 74

Unit 8 Solving Problems ... 75

Lesson 1 Two-step Multiplication Method ... 76

The second class, multiplication two-step operation application exercise ... 77

The third category, a two-step solution to the problem ... 78

The fourth class, multiply (subtract) divide (subtract) to solve problems ... 80

Lesson 5 Practical Activities: Designing a New Campus ... 8 1

Unit 9 Mathematics Wide Angle ... 83

The thinking method of gathering in the first class ... 83

The thinking method of equivalent substitution in the second classroom ... 84

Unit 10 General Review ... 86

The divisor in the first category is the division of 10 digits ... 86

Category II: Area ... 87

A Preliminary Understanding of Counting Decimals in the Third Classroom ...

The position and direction of the fourth kind of year, month and day ...

The fifth class solves problems ... 9 1