Multiplying Signed Numbers Concepts

This lesson focuses on developing rules for multiplying signed numbers, exploring how to determine if a product is positive or negative. The teacher uses quadrants to identify patterns and mirror images, emphasizing the importance of absolute values. The lesson also covers removing cards to illustrate changes in values and uses real-world examples to apply these concepts. Students are encouraged to pause and solve problems to reinforce learning.

What is the main goal of this lesson on multiplying signed numbers?

• To memorize multiplication tables

• To understand division of signed numbers

• To determine if the product of signed numbers is positive or negative

• To learn how to add signed numbers

In quadrant one, what is the result of multiplying two positive numbers?

• An undefined product

• Zero

• A positive product

• A negative product

What happens to the product when you multiply a positive number by a negative number?

• The product is positive

• The product is negative

• The product is undefined

• The product is zero

What does removing a positive value from a set of cards represent?

• An increase in score

• A decrease in score

• No change in score

• A multiplication by zero

If you remove three cards each with a value of two, what is the change in score?

• Increase by three

• No change

• Decrease by six

• Increase by six

What is the result of multiplying two negative numbers?

• An undefined product

• Zero

• A negative product

• A positive product

In a real-world scenario, what does losing three five-dollar bills represent?

• A gain of 15 dollars

• A gain of 5 dollars

• A loss of 15 dollars

• No change in money

What is the overall change if the temperature decreases by 7 degrees every hour for 4 hours?

• A decrease of 28 degrees

• A decrease of 7 degrees

• An increase of 28 degrees

• No change

What is the rule for multiplying a positive number by a negative number?

• The product is undefined

• The product is zero

• The product is negative

• The product is positive

What is the result when multiplying a positive number by another positive number?

• A positive product

• Zero

• A negative product

• An undefined product