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Authoritative PPT Summary
"Origami" Fraction Addition and Subtraction PPT Download
Part One: Learning Objectives
1. Experience the origami operation and the activity process of common fractions to explore the calculation method of adding and subtracting fractions with different denominators, understand the calculation principles, and experience the application of intuitive models of fractions and mathematical "transformation" ideas in solving problems.
2. Be able to correctly add and subtract fractions with different denominators and solve related practical problems.
focus
Able to correctly add and subtract fractions with different denominators and solve related practical problems.
difficulty
Experience the application of intuitive models of fractions and mathematical "transformation" ideas in solving problems.
Origami PPT, part 2: interpretation of examples
What fraction of the paper did they use in total?
I draw a picture.
Become fractions with the same denominator...
Answer: They used a total of 3/4 of the paper.
Origami PPT, Part 3: Summary
Adding and subtracting fractions with different denominators
One pass: first pass the fractions, convert the fractions with different denominators into fractions with the same denominator;
Second calculation: Calculate according to the calculation rules of addition and subtraction of fractions with the same denominator;
Three Reconciliations: If the result can be reduced, it should be reduced to the simplest fraction.
Origami PPT, Part 4: Quiz in class
1. Calculate.
2. Calculate first, then choose any two questions to test.
The verification method for adding and subtracting fractions is the same as that for adding and subtracting integers.
Origami PPT, Part 5: Homework
1. Select from the after-class exercises;
Keywords: Free download of Beijing Normal University Edition fifth grade mathematics PPT courseware volume 2, origami PPT download, fraction addition and subtraction PPT download, .PPT format;
For more information about the "Addition and Subtraction of Fractions Origami" PPT courseware, please click the Addition and Subtraction of Fractions PPT Origami PPT tab.
"Origami" Fraction Addition and Subtraction PPT Courseware (Lesson 2):
"Origami" Fraction Addition and Subtraction PPT Courseware (Lesson 2) Part One: Learning Objectives 1. Further master the calculation method of adding and subtracting fractions with different denominators, and be able to perform calculations correctly. (Key points) 2. Understand that when a common denominator is used, the lowest common multiple of the denominator is used as the common denominator..
"Origami" Fraction Addition and Subtraction PPT Courseware (Lesson 1):
"Origami" Fraction Addition and Subtraction PPT Courseware (Lesson 1) Part One: Learning Objectives: Master the calculation method of adding and subtracting fractions with different denominators, and be able to perform calculations correctly. (Key points) Understand the arithmetic of addition and subtraction of fractions with different denominators. (Difficulty) ... ... ... fold...
"Origami" Fraction Addition and Subtraction PPT:
"Origami" Fraction Addition and Subtraction PPT Part One Content: Situation Import Based on this picture, what mathematical questions can you ask? Explore new knowledge. What fraction of this paper did they use in total? How much more of this paper did Xiaoxiao use than Naughty? Do the math. ..