"Multiplication of Rational Numbers" Rational Numbers PPT Courseware 3

"Multiplication of Rational Numbers" Rational Numbers PPT Courseware 3

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"Multiplication of Rational Numbers" Rational Numbers PPT Courseware 3

The multiplication laws learned in primary school are still applicable to the multiplication of rational numbers.

Use letters to express the multiplication exchange rate: a×b=b×a

Use letters to express the multiplication rate: (a×b)×c=a×(b×c)

Use multiplication rate calculations

(1)(-25)×39×(-4)

(2)125×25×(-4)×(-8)

Use letters to express the multiplication distribution rate: a(b+c)=ab+ac

The inverse operation of the multiplication distribution ratio expressed in letters is: a(b+c)=ab+ac

Classroom improvement

Calculation: -2×6 + 3×6=(-2+3)×6

What calculation rate is used?

If a is used to represent any number, then use the distributive law of multiplication to calculate: -2a + 3a=?

-2a + 3a =(-2+3)a=a

Class summary

1) What are the multiplication rates of rational numbers?

2) Using the operation rate in multiplication calculations can make the calculation simple

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

"Multiplication of Rational Numbers" Rational Numbers PPT Courseware 2:

"Multiplication of Rational Numbers" Rational Number PPT Courseware 2 We are already familiar with the multiplication operation of positive numbers and 0. How to perform the multiplication operation of rational numbers after introducing negative numbers? (1) If the snail has been crawling to the right at a speed of 2CM per minute, after 3 minutes it will be at What position? (2..

"Multiplication of Rational Numbers" Rational Numbers PPT courseware:

"Multiplication of Rational Numbers" Rational Numbers PPT Courseware Generally speaking, multiplying a number by the sum of two numbers is equivalent to multiplying this number by the two numbers respectively, and then adding the products. Distributive law: a(b+c)= ab+ac Compare the above two solutions, what are the differences between them in the order of operations?

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