Multiplication sum factor
Unit teaching content
The main contents of this unit include understanding natural numbers and integers; Multiples and factors;
2
five
three
Characteristics of multiples; Discovering factors and findings
Multiplicity; Prime numbers and composite numbers; Odd and even numbers make knowledge more systematic.
Unit teaching objective
1
Experience the activities of exploring the related characteristics of numbers, know natural numbers and integers, and know multiples and factors.
1~ 100
Dezi
Find out from the probability
10
All multiples of natural numbers can be found.
100
All the factors of natural numbers. Know the prime number,
Composite number, you can judge whether a number is prime or composite.
2
experience
2
three
five
Explore the multiple characteristics of the process, you know?
2
three
five
The characteristics of multiples can determine whether a number is.
be
2
three
or
five
A multiple of. Knowing odd and even numbers, you can know whether a number is odd or even.
three
According to the needs of solving problems, collect useful information, make induction, analogy and guess, and develop preliminary reasonable inference.
Management ability.
four
Actively participate in exploration activities, and experience observation, analysis, induction or conjecture verification in the process of exploring the characteristics of numbers.
Methods: Experience the exploration and challenge of mathematical problems in mathematical activities.
Unit teaching material analysis
This unit is the basis for students to learn integer knowledge and four operations of integer, decimal, fraction and negative number.
Start studying online. The learning content of this unit mainly includes understanding natural numbers and integers, multiples and factors, and finding multiples;
2
five
three
double；twofold
Characteristics of numbers; Find the factor; The knowledge of prime numbers and composite numbers, odd numbers and even numbers further systematizes knowledge. The study of this knowledge is based on
Post-learning is an important foundation of knowledge such as common multiple, common factor, approximate fraction, general fraction and calculation of fraction.
The knowledge in this unit belongs to the preparatory knowledge of number theory, with many concepts, some of which are abstract and interrelated.
Tight,
Some students will have some difficulties in their studies.
The textbook clearly stipulates that when learning multiples and factors,
Limit to non-zero
Study within the range of natural numbers to avoid the problem that some primary school students don't need to study.
Teaching focus:
Distinguish between prime numbers and composite numbers; Odd numbers and composite numbers.
Teaching difficulties
1
Distinguish concepts and find out the relationship between them.
2
Can judge flexibly according to the concept.
Class arrangement
The world of numbers
1
Exploration activities (1):
2
five
Multiple characteristics of
2
Exploration activities (2):
three
Multiple characteristics of
1
Find a factor
Looking for prime numbers
three
Exercise (1)
1
Equal number of people
1
Exercises, unit tests and summaries