"Laws of Exploration and Expression" Integers and their addition and subtraction PPT (Lesson 1)

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"Laws of Exploration and Expression" Integers and their addition and subtraction PPT (Lesson 1)

Part One Content: Basic Knowledge Key Points

Knowledge point 1: The changing rules of numerical expressions

1. Observe a set of numbers 3,5,7,9,…, then the nth number can be expressed as (D)

A.2(n-1) B.2n-1

C.2( n+1 ) D.2n+1

2. Observe the following equations: 21=2, 22=4, 23=8, 24=16, 25=32,..., through observation, use the rules you discovered to determine that the single digit of 22018 is (B)

A.2 B.4 C.6 D.8

4. Observe the calculation process of the following formulas:

5×5=0×1×100+25;

15×15=1×2×100+25;

25×25=2×3×100+25;

35×35=3×4×100+25;

Please guess that the nth calculation (n is a positive integer) should be expressed as [10(n-1)+5][10(n-1)+5]=100n(n -1 )+25.

Exploring and expressing rules PPT, part 2: improvement of comprehensive capabilities

8. As shown in the picture, four children stand in a row. The teacher counts according to the rules shown in the picture. When the number reaches 2019, the corresponding child will get a red flower. Then, the child who gets the red flower is (C)

A. Xiao Shen B. Xiao Ye C. Xiao Li D. Xiao Wang

9. Observe the picture below and find the pattern.

10. As shown in the figure, a frog jumps on five points marked with numbers on the circumference. If it stops on an odd-numbered point, it will jump two points in the clockwise direction next time; if it stops on an even-numbered point, it will jump next time. Jump one point at a time in the counterclockwise direction. If the frog starts jumping from the point numbered 1, and jumps to the point numbered 3 for the first time, then the number corresponding to the point where it stops after 2019 jumps is 2.

Keywords: Beijing Normal University edition seventh-grade mathematics PPT courseware free download, exploration and expression of rules PPT download, integers and their addition and subtraction PPT download, .PPT format;

For more information about the PPT courseware "Integral Formulas and Their Addition and Subtraction Exploration and Expression Rules", please click the Integer Expressions and their Addition and Subtraction PPT Exploration and Expression Rules PPT tab.

"Laws of Exploration and Expression" Integral formulas and their addition and subtraction PPT download:

"Exploring and Expressing Laws" Integers and their addition and subtraction PPT download Part 1 content: Learning objectives 1. Be able to use algebraic expressions to express the changing laws of numbers and graphics. (Key points) 2. Further cultivate students' thinking abilities such as observation, analysis, abstraction, and generalization. and application awareness. (Difficulty...

"Laws of Exploration and Expression" Integral formulas and their addition and subtraction PPT (Lesson 2):

"Exploring and Expressing Rules" Integral formulas and their addition and subtraction PPT (Lesson 2) Part 1 content: Basic knowledge points are represented by letters and the rules or phenomena are explained with the help of operations 1. There is a game rule: you want to multiply a number by 2 and add it Divide 6 by 2 and subtract the number you want...

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Update Time: 2024-10-27

This template belongs to Mathematics courseware Beijing Normal University Edition Seventh Grade Mathematics Volume 1 industry PPT template

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