Except for ...
law
1. Divide integer tens and two digits by one digit (the first digit is divisible).
One,
Teaching content:
textbook
P 1~2
Page.
Second, the teaching objectives:
Cognition: Mastering divisor is the division of single digits (the first digit can be divisible), and being able to calculate or list correctly and skillfully.
Vertical calculation.
Emotion: through group discussion, enhance students' spirit of cooperation and mutual assistance and master group cooperative learning.
The basic method of.
Operation: master the method and basic requirements of vertical column, and make it neat and correct.
Third, the key teaching difficulties:
Make students master the division of divisor into single digits in oral calculation or column vertical calculation (the first digit can be evenly divided) and be familiar with it.
Practice and calculate correctly.
It is clear that the divisor is the arithmetic and algorithm of division of single digits (the first digit is divisible), and it is calculated correctly.
Fourth, teaching preparation:
Wall chart, small blackboard, draft book
Verb (abbreviation of verb) teaching process;
1
, import:
Show me the scene map. What do you know from this picture? So what kind of questions can you ask?
Ask, "How many cigarettes does each boy buy on average?" How should it be formulated?
Blackboard writing:
40
÷
2=
(
)
How to calculate this problem? Please communicate with the students in the group. (the famous mouth answers, teacher.
Blackboard book)
If you ask, "How many cigarettes does each girl buy on average?" How should it be formulated?
Blackboard writing:
46
÷
2=
(
)
Can this topic be divided as just now? This is a new lesson we are going to learn today.
Rong!
Blackboard: division (divisible by the first digit)
2
, newly awarded
Now please discuss in groups. How do you calculate division? Use your prescription.
Method to calculate the answer.
group discussion
Group report
way
1
: (oral calculation)
Everyone gets it first.
2
The bundle is
20
Branch, share again
three
Branches, together, are
23
Branches.
Blackboard writing:
40
÷
2=20
、
six
÷
2=3
、
20+3=23
way
2
: (column vertical calculation)
Blackboard writing:
2
three
.
2
)
four
six
four
.
six
six
.
Three numbers
2
Why is it written in the top ten?
Please open your books. This is the new content of our study today. Please read the textbook independently. Do you have any questions?
You can ask questions where you understand.
three
Practice
(
1
), think about it.
1
Will consider being the first.
1
Do the questions in the textbook in groups.
Answer by name and correct collectively.
What characteristics did you find in each set of questions in the first question? So what shall we do when we do this kind of oral calculation in the future?
Easier?
(
2
), think about it.
2
Next, please think about the second question. First of all, please put the first two questions on the textbook, please two.
Students go to the blackboard and do it.
What should we pay attention to in collective correction and vertical calculation? First question
three
Why write it in business?
In the top ten?
(
three
), think about it.
four
Please look at the picture in question 4 and tell us what you know from it.
What exactly does the topic "How many groups can you divide into" mean?
Request "
39
How much is in it?
three
? "How should the column type? Please do it in the class workbook.
Text revision.
(
four
), think about it.
five
Read the title by name
If we want to know which saplings are more expensive, what must we find out first?
How much is each poplar sapling? How much is each pine sapling? Please count one.
Now, which sapling is more expensive per tree?
Collective revision.
four
, homework
Consider doing the first thing.
three
title
Postscript: