"Power of Rational Numbers" PPT courseware 4

Description

"Power of Rational Numbers" PPT courseware 4

Collaborative research one:

Fold in half twice and cut into 4 sheets, i.e. 2×2 sheets;

Fold in half three times and cut into 8 sheets, that is, 2×2×2 sheets;

Question: How many pieces can be cut into by folding it in half 10 times? Please use an equation to express it (no need to calculate the result)

If you fold it in half 100 times, how many 2s are there in the formula?

The number of sheets cut by folding 10 times is calculated using the following formula: 2×2×2×2×2×2×2×2×2×2

is a product expression with 10 multiplications of 2;

The number of sheets cut after folding in half 100 times can be calculated using the formula

Calculate, there are 100 multiplications of 2 in this product. Is there a simple notation for such a long calculation?

Knowledge objectives: Understand the meaning of exponentiation and be able to read and write correctly;

Master the properties of power and be able to perform exponentiation operations.

Ability goal: Cultivate the ability of observation, analogy, induction, and knowledge transfer.

Develop computing skills through exponentiation operations;

Important and difficult points in teaching:

Key points: the meaning of rational number exponentiation;

Difficulty: The concepts and representations of power, base, and exponent

This operation of finding the product of n identical factors is called exponentiation.

The result of exponentiation is called a power.

In an, a is called the base and n is called the exponent.

an is read as a raised to the nth power, and can also be read as a raised to the nth power.

Class summary

What did you gain from studying this class?

1. Power is a special multiplication operation. The so-called special operation means that the factors multiplied by are the same;

2. Power is the result of the exponentiation operation; any power of a positive number is a positive number, the odd power of a negative number is a negative number, and the even power of a negative number is a positive number;

3. When performing exponentiation operations, the sign should be determined first and then calculated.

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For more information about the "Power of Rational Numbers" PPT courseware, please click on the Power of Rational Numbers ppt tab.

"Power of Rational Numbers" PPT courseware 3:

"Power of Rational Numbers" PPT Courseware 3 Teaching Objectives Knowledge and Skills 1. Experience the generation process of the concept of power through examples; 2. Understand the concepts of power, power, exponent, and base, and master the representation of power and power; 3. Understand the symbolic law of power and be able to carry out rational...

"Power of Rational Numbers" PPT courseware 2:

"Powers of Rational Numbers" PPT Courseware 2 There is a piece of paper with a thickness of 1 micron. After folding it in half 50 times, please imagine how high the thickness is? ⑴ After folding twice, how many microns is the thickness? 221 ⑵ After folding it in half three times, how many microns is the thickness? 2221 ⑶ After folding in half 4 times, the thickness...

"Power of Rational Numbers" PPT courseware:

"Power of Rational Numbers" PPT courseware Take a test: 1. The operation of finding ____________________ is called exponentiation. The result of exponentiation is called __________. 2. 222222 is written as _______ and pronounced as ________. 2 is called _____, and 6 is called _____. 3. 777 is recorded as...

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Update Time: 2024-09-09

This template belongs to Mathematics courseware Hebei Education Edition Seventh Grade Mathematics Volume 1 industry PPT template

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