Multiplying Positive and Negative Integers Using a Number Line

This video tutorial teaches how to multiply positive and negative integers using a number line. It begins with a review of integers and multiplication, explaining the commutative property. The lesson addresses common mistakes, such as assuming a negative product when multiplying two negative numbers. The core lesson demonstrates multiplying positive and negative numbers, emphasizing that a negative times a negative results in a positive product. The tutorial concludes with examples to reinforce these concepts.

What is the commutative property of multiplication?

• Multiplication is the same as division.

• The order of multiplication does not matter.

• The order of addition does not matter.

• Multiplication always results in a larger number.

When multiplying two positive numbers, what is the sign of the product?

• Positive

• It depends on the numbers

• Zero

• Negative

If you multiply +5 by +2, what is the result?

• +7

• +10

• 0

• -10

What happens to the product when you multiply two negative numbers?

• The product is negative.

• The product is zero.

• The product is undefined.

• The product is positive.

When multiplying -5 by -2, what is the result?

• -10

• +10

• 0

• +5