Understanding Multiplication and Negatives

This video tutorial teaches how to multiply a negative integer by a positive integer using the concept of equal groups. It explains multiplication as scaling, introduces models for representing integers, and demonstrates solving problems using a product box and neutral field. The tutorial concludes with examples and a summary of the key concepts.

What is the main focus of this lesson?

• Adding two positive integers

• Dividing two negative integers

• Subtracting a positive integer from a negative integer

• Multiplying a negative integer by a positive integer

What does it mean to multiply a number?

• To subtract a number by a specified scale

• To divide a number by a specified scale

• To increase a number by a specified scale

• To decrease a number by a specified scale

In the example 3 times 6 equals 18, what are 3 and 6 referred to as?

• Differences

• Sums

• Factors

• Products

What does a blue plus sign represent in the models used?

• A neutral field

• A negative one

• A positive one

• A zero pair

What is a zero pair?

• A pair of two zeros

• A pair of one positive and one negative number

• A pair of two negative numbers

• A pair of two positive numbers

What is the initial value of the product box?

• Zero

• One

• Negative one

• Fifteen

How do you represent negative groups in the product box?

• By adding negative numbers

• By adding positive numbers

• By removing positive numbers

• By removing negative numbers

What is the result of negative five times three?

• Positive fifteen

• Negative fifteen

• Zero

• Negative three

How many negatives are left in the product box after removing seven groups of two positives?

• Fourteen

• Seven

• Twenty-one

• Zero

What is the product of negative seven times two?

• Negative fourteen

• Positive fourteen

• Zero

• Negative seven