"Rational Numbers" PPT courseware

Description

"Rational Numbers" PPT courseware

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1. What are positive and negative numbers?

2. The meaning of “0”

3. The classification of numbers we have learned so far.

gather

1. Concept: All the numbers of a type with certain characteristics form a set of numbers.

Example: All positive integers form the set of positive integers;

Therefore, negative integers form the set of negative integers;

All positive fractions form the set of positive fractions;

2. Representation of sets

(1) Circle method

(2) Braces method

1.5 can be written as the ratio of 3 and 2. If two integers are required to be relatively prime, the answer is unique

summary:

1. Main knowledge

The concept of rational numbers: Integers and fractions are collectively called rational numbers.

2. Classification of rational numbers

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"Mixed Operations of Rational Numbers" PPT courseware 4:

"Mixed Operations of Rational Numbers" PPT Courseware 4 1. Rules for mixed operations of rational numbers: (1) Calculate exponentiation first, then multiplication and division, and finally addition and subtraction. (2) If there are parentheses, perform the operations in the parentheses first. Operations in parentheses: exponentiation, multiplication, division, addition and subtraction Summary: 1. have..

"Mixed Operations of Rational Numbers" PPT courseware 3:

"Mixed Operations of Rational Numbers" PPT Courseware 3 Mixed Operations of Rational Numbers Addition of the same sign takes the same sign absolute value addition of different signs takes the sign of the larger absolute value absolute value subtraction subtraction subtracting a number is equal to adding the opposite of the number multiplication Take the positive absolute value with the same sign..

"Power of Rational Numbers" PPT courseware 4:

"Power of Rational Numbers" PPT Courseware 4 Collaborative Exploration 1: Fold in half twice and you can cut into 4 pieces, that is, 22 pieces; Fold in half three times and you can cut into 8 pieces, that is, 222 pieces; Question: If you fold in half 10 times, how many pieces can you cut into? ? Please use a formula to express it (no need to calculate the result). If you fold it in half 100 times, the formula...

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Update Time: 2024-11-23

This template belongs to Mathematics courseware People's Education Press Seventh Grade Mathematics Volume 1 industry PPT template

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