"Division of Rational Numbers" PPT courseware

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"Division of Rational Numbers" PPT courseware

Please try to fill in the blanks:

2×(-3)= (-6) ÷2=______

(-4) ×(-3)= 12÷(-4)=______

8×9= 72÷9=_______

(-5) ×7/5= (-7) ÷(-5)=______

0 ×(-6)= 0 ÷(-6)=______

Combine the above sets of calculations and discuss in groups:

When dividing two rational numbers, how is the sign of the quotient determined? How is the absolute value of the quotient determined?

Rational division rules

If two numbers are divided, the numbers with the same sign will be positive, and the numbers with different signs will be negative, and the absolute values ​​will be divided.

0 divided by any number not equal to 0 is 0.

What are the similarities and differences between the division rule and the multiplication rule?

Multiplication and division are inverse operations of each other

Observe and think:

1. Calculate the two calculations in the following questions and observe the relationship between the results of each set of calculations, and what is the relationship between the divisor in division and a multiplier in multiplication.

(1) (-8) ÷(-4) and (-8) ×(-1/4)

(2) 6 ÷(-4/5) and 6 ×(-5/4)

2. Can you cite two sets of equations with the above characteristics?

3. Can the division operation of rational numbers be converted into multiplication operation? What is the method of conversion?

Dividing by a number is equal to multiplying the reciprocal of that number

think:

a/b >0, then what are the symbols of a and b?

a/b <0, then what are the symbols of a and b?

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For more information about the "Division of Rational Numbers" PPT courseware, please click the "Division of Rational Numbers" ppt tag.

"Division of Rational Numbers" Rational Numbers and Their Operations PPT Courseware 2:

"Division of Rational Numbers" Rational Numbers and Their Operations PPT Courseware 2 Teaching Objectives: 1. Understand the rules of division of rational numbers and be able to perform division operations of rational numbers. 2. Be able to find the reciprocal of rational numbers. When two numbers are multiplied together, the numbers with the same sign are positive, and the numbers with different signs are negative, and the absolute values ​​are multiplied together. ..

"Division of Rational Numbers" Rational numbers and their operations PPT courseware:

"Division of Rational Numbers" Rational Numbers and Their Operations PPT Courseware Teaching Objectives: 1. Understand the rules of division of rational numbers and be able to perform division operations of rational numbers. 2. Be able to find the reciprocal of rational numbers. Review: 1. What is the meaning of division learned in elementary school? It's the same as multiplication..

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Update Time: 2024-11-22

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

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