"Addition and Subtraction of Fractions" PPT courseware

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People's Education Press fifth grade mathematics volume 2	pptx	6 MB

"Addition and Subtraction of Fractions" PPT courseware

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Upload Time: 2024-11-20

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"Addition and Subtraction of Fractions" PPT courseware

How many laws of operation are there for integer addition? How to express it with letters?

There are two laws of operation for integer addition.

Commutative law of addition: a+b=b+a

Additive associative law: (a+b)+c=a+(b+c)

What law of operation applies to each of the following equations?

①25＋36＝36＋25

②（17＋28）＋72＝17＋（28＋72）

③6.2＋2.3＝2.3＋6.2

④（0.5＋1.6）＋8.4＝0.5＋（1.6＋8.4）

summary

Applying the operation law of integer addition, it is easier to add fractions with the same denominator first, or make them into integers and then calculate them.

Keywords: Addition and subtraction of fractions courseware, New People's Education Edition fifth grade mathematics volume 2 PPT courseware, fifth grade mathematics slide courseware download, Addition and subtraction of fractions PPT courseware download, .ppt format

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"Addition and Subtraction of Fractions" Flash animation courseware:

"Addition and Subtraction of Fractions" Flash animation courseware. This courseware helps students learn the knowledge points of addition and subtraction of fractions in the form of exercises. It summarizes the knowledge points of this lesson and is a good way to consolidate knowledge points and review the course. Courseware. Keywords: points..

"Addition and Subtraction of Fractions with Different Denominators" Addition and Subtraction of Fractions PPT Courseware 3:

"Addition and Subtraction of Fractions with Different Denominators" Addition and Subtraction of Fractions PPT Courseware 3 Teaching Objectives 1. Enable students to understand the arithmetic of addition and subtraction of fractions with different denominators. 2. Preliminarily master the rules of addition and subtraction of fractions with different denominators. ... ... ... Steps to solve problems of adding and subtracting fractions with different denominators: 1..

"Addition and Subtraction of Fractions with Different Denominators" Addition and Subtraction of Fractions PPT Courseware 2:

"Addition and Subtraction of Fractions with Different Denominators" Addition and Subtraction of Fractions PPT Courseware 2 Example: To prevent SARS, Mr. Li from the General Affairs Office of our school spent 3/4 hours disinfecting Class 6 (1), and disinfected Class 6 (2) for 3/4 hours. 1/2 hour. How many hours did Teacher Li spend in total? 1. Be alone first..

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Update Time: 2024-11-20

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"Addition and Subtraction of Fractions" PPT courseware