Subject: Mathematics

Grade: Grade 5

Lecturer: Dear Zhang.

Subject: Equation

Teaching process:

First, import

Teacher: What do we call it when we go to the market to buy things?

Student: Scale, electronic scale.

Teacher: Have you ever seen such a scale? Show me the balance.

Second, introduce the balance.

It has two trays, with a scale in the middle, two-day scales are equal, and the middle scale is 0. This is balance.

Third, explore new knowledge and watch courseware.

(1) equation

1, put weights on both sides of the balance, the left plate: 20g and 30g, the right plate: 50g, and the middle scale points to 0, indicating the balance of the balance.

Question: Can you list a formula on this basis?

Student: 20+30=50

2. Look at the courseware and the formula.

30+x=80 x+20=70 2x= 100

3. What is an equation? Students say together: the formula of an equation is called an equation.

For example: 60+x=80 70+20=90 50-20=30.

4. Summary: What we just said is an equation. Let's find an equal relationship first An equation is a formula for expressing equality.

5. Counterexample: Is 5x & gt29 30 & lt70 an equation?

Student: No.

6. Say the concept of equation twice.

(2) Equation

1, what are some expressions like 30+x=80, x+20=70, 2x= 100?

Student: Equation

Teacher: It seems that this classmate previewed this section, which is worthy of praise.

2. Yes, this is an equation. An equation containing unknowns like this is called an equation. Read repeatedly. Give an example of an equation.

3. The relationship between equation and equation.

All equations are equations, and all equations are not necessarily equations.

(3) Write on the blackboard

20+30=50

An equation representing equality is called an equation.

30+x=50

x+20=70

2x= 100

Equation with unknown number

Fourth, practice

1, judge which are equations and which are equations? Why?

2. Look at the picture equation and say what it means.

Verb (abbreviation of verb) summary: What is an equation? Equation?

The expression of equality is called equality.

Equations with unknowns are called equations.

Comments on the lecture:

1. Introduce things from life to attract students' attention.

2. The classroom arrangement is logical: equivalence-→ equation-→ equation.

3. On the blackboard, we pay attention to distinguish with colored pens and describe the concepts clearly.

I take care of most students in class and can treat them equally.

5. When emphasizing the key points, adopt the method of reading more and reading more to deepen students' impression.