Multiplicative vertical type

Teaching objectives:

1, let students learn to write multiplication vertically and calculate multiplication in the table vertically.

2. Continue to cultivate students' autonomous learning ability, experience the fun of success, enhance their interest in learning mathematics, establish confidence in learning mathematics well, and develop the habit of writing.

Key points and difficulties:

Master the vertical writing of multiplying two one-digit numbers.

Teaching preparation:

wall map

Teaching process:

First, create situations and introduce new lessons.

1, Dialogue: Every noon, the children in our class will read books in the bookcase in the classroom. Look! There are two groups of students reading books, four in each group. How many people are reading already?

2. Question: Can you list the multiplication formulas and calculate them? (Answer by name, the teacher writes it on the blackboard)

3. Tell each part of the multiplication formula.

4. It is proposed that addition and subtraction can be calculated vertically, and multiplication and division can also be calculated vertically. (blackboard title: vertical multiplication)

Second, independent exploration, perception methods

1, vertical teaching 24

(1) Try the line form, name the chessboard and determine the correct vertical form.

(2) Question: Can you tell me the names of the parts in the multiplication formula?

(3) Discussion: Comparing vertical multiplication with vertical addition and subtraction, what do you find?

(4) Guide the students to discuss and find that the multiplication vertical and the addition and subtraction vertical are the same, but the calculation symbols are different, so the multiplication formula is used for calculation.

2. Try it: 57

Let the students calculate and choose the blackboard independently, as follows

5 5 5

7 7 7

35 35 35

Discrimination: Which one do you think is correct? Discuss at the same table, and then talk about your ideas in class.

The class discussion pointed out that the unit of product should be consistent with the multiplier.

3. Summary: Just now, we calculated the vertical multiplication. Do you think the vertical multiplication is easy to write? What do you want to remind the children?

Third, consolidate the practice.

1, I want to do the problem when I finish.

2. Homework: Question 2 on page 65

Blackboard design:

Multiplicative vertical type

4 2 = 8

4 multiplier

2 multiplier

8 products