"Algebraic Formulas" Integral formulas and their addition and subtraction PPT courseware

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"Algebraic Formulas" Integral formulas and their addition and subtraction PPT courseware

teaching objectives:

Knowledge goal: To deepen the understanding of algebraic expressions and enable students to use algebraic expressions to express simple quantitative relationship statements.

Ability goal: Cultivate students' abstract thinking ability through the series of algebraic expressions.

Emotional goals: Through independent thinking and group discussions, teacher-student exchanges, cultivate students' awareness of autonomy and cooperation spirit, establish innovative consciousness, and stimulate students' enthusiasm for applied mathematics.

1. What should we pay attention to when writing algebraic expressions?

(1) The multiplication sign appearing in algebraic expressions is usually written as "." or omitted;

(2) When multiplying numbers and letters, the numbers are written in front of the letters;

(3) Division operations are written in fractional form.

2. Fill in the blanks:

(1) The perimeter of a rectangle with length a meters and width b meters is ______ meters;

(2) If the area of ​​a circle with radius r cm increases by 10%, the area will increase by ______ square centimeters.

Two points should be noted in column algebraic expressions:

1. We must correctly understand the quantitative relationship in the question, especially the meanings of sum, difference, product, quotient, large, small, more, less, times, fractions and other words in the question.

2. Be clear about the order of operations in the problem.

Expressed algebraically:

1. The sum of the squares of the two numbers a and b minus 2 times their product;

2. The square of the sum of the two numbers a and b minus the square of their difference;

3. The product of the sum of two numbers a and b and their difference;

4. Even number, odd number.

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For more information about the PPT courseware "Algebraic Expressions and Integers and Their Addition and Subtraction", please click on the Algebraic Expressions ppt Integers and Their Addition and Subtraction ppt tag.

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Update Time: 2024-11-21

This template belongs to Mathematics courseware Beijing Normal University seventh grade first volume mathematics industry PPT template

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