"The Greatest Common Factor" PPT courseware on the meaning and properties of fractions

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"The Greatest Common Factor" PPT courseware on the meaning and properties of fractions

1. Introduction of activities and exploration of new knowledge

(1) Create learning activities and initially experience new knowledge

1. Ask students whose student ID is a factor of 8 to stand up and report their student ID. Please ask students whose student ID is a factor of 12 to stand up and report their student ID.

2. What did you discover through the activity just now?

3. Why do students with student numbers 1, 2, and 4 stand up twice?

(2) Establish concepts in group activities

1. ①Think about it and express the mathematical game process just now in your favorite way.

② Share your ideas with classmates in the group.

③Revise and improve your own research results.

2. Students carry out learning activities.

2. Independent exploration and mastering methods

1. How to find the greatest common factor of 18 and 27?

2. Requirements: ①Please find the greatest common factor of 18 and 27.

② Share your methods with your classmates.

3. Display:

① Arrangement method: Factors of 18: 1, 2, 3, 6, 9, 18

Factors of 27: 1, 3, 9, 27

Common factors of 18 and 27: 1, 3, 9 greatest common factor

② Screening method: Factors of 18: 1, 2, 3, 6, 9, 18. Among them, 1, 3, and 9 are also factors of 27, and 9 is the largest.

3. Apply knowledge and consolidate practice

1. Mark “○” on the factor of 18 and “□” on the factor of 30.

2. Kitten Fishing: Find the greatest common factor of the numerator and denominator and connect them with a line.

4. Reflect and review, improve understanding

We have now learned about factors, common factors, and the greatest common divisor. Can you tell us what the differences are between the three?

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Update Time: 2024-11-21

This template belongs to Mathematics courseware People's Education Press fifth grade mathematics volume 2 industry PPT template

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