"Formulas and Equations" general review PPT courseware

"Formulas and Equations" general review PPT courseware

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"Formulas and Equations" general review PPT courseware

① Formulas containing letters: a+b, a-486, 8X, etc.

②Inequality: 3+5>7, 1+3<5, 5a-40>16, etc.

③Equation: For example: 1+2=3, 99+1=100, 4X=24, 8x-4.8x=1.6, etc.

④Equation: 4X=24, 8x-4.8x=1.6, etc.

Exercises and Practice

1. The unit price of a kind of greeting card is A yuan. Xiaoying buys 5 such greeting cards. ( ) yuan is used; Xiao Ming buys n such greeting cards and pays 10 yuan, and should get back ( ) yuan.

2. The electricity fee is 0.52 yuan per kilowatt hour, and the water fee is 2 yuan per cubic meter. Xiao Ming's family used a kilowatt-hour of electricity and b cubic meters of water this month, and had to pay a total of () yuan in utility bills.

3. Xiaohong is m years old this year, and Teacher Chen is 3 times younger than her by 8 years. Teacher Chen’s age is ( ) years. If m=12, Teacher Chen is ( ) years old this year.

4. Build a road a kilometer long, if you build 2 kilometers every day. After repairing b days, there are ( ) kilometers left.

5. Three consecutive natural numbers, the largest one is a, then the smallest number is ( ).

Properties of the equation:

1. If the same number is added (subtracted) to both sides of the equation at the same time, the equation still holds.

2. If both sides of the equation are multiplied (divided) by the same number (except 0) at the same time, the equation still holds.

Column equations are not evaluated:

(1) 567 minus 4 times of a certain number is equal to 6, find a certain number.

(2) The sum of a number ( ) plus 22 is 28. Find this number.

(3) The ( ) of a number is 40 more than its ( ). What is this number?

(4) 235 minus a number ( ), the difference is 5, what is this number?

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"Formulas and Equations" PPT:

"Formula and Equations" PPT Part One content: Class introduction: WC, km, kg, S= (a+b)h2, a+b= b+a Use letters to express numbers, which is relatively concise and clear. Newly granted letters are used to express quantitative relationships. Letters are used to express operation laws. Letters are used to express calculation formulas..

"Equations and Equations" Equations Flash animation courseware:

"Equations and Equations" Equations Flash Animation Courseware This courseware is a teaching material for Equations and Equations Flash Animation Courseware of Unit 8 Equations in Volume 1 of Fifth Grade Mathematics of Hebei Education Edition. The content is vivid and vivid. Please download it! Keywords: Equation teaching courseware, teaching of equations and equations..

"Formulas and Equations" Numbers and Algebra PPT courseware:

"Equations and Equations" Numbers and Algebra PPT courseware 1. Introduce situations and review old knowledge (1) Formulas containing letters represent quantities and quantitative relationships, operating laws and calculation formulas. Provide information: Boys in the school dance club have a person, and girls have b People, how many people are there in total? ..

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