Understanding Multiplication with Negative Numbers

The video tutorial explores the concept of multiplication involving positive and negative numbers. It begins with a basic understanding of multiplying positive numbers and then introduces negative numbers. The tutorial explains the rules for multiplying a negative number by a positive number, and vice versa, emphasizing that the product is negative. It further explores the multiplication of two negative numbers, explaining that the negatives cancel out, resulting in a positive product. The video concludes with exercises to reinforce these concepts, demonstrating various multiplication scenarios.

What is the result of multiplying two positive numbers?

• A negative number

• An undefined number

• A positive number

• Zero

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CCSS.3.OA.D.9

How can you think of -2 times 3?

• As subtracting 2 three times

• As subtracting -2 three times

• As adding -2 three times

• As adding 2 three times

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of multiplying a negative number by a positive number?

• A positive number

• Zero

• A negative number

• An undefined number

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CCSS.7.NS.A.2C

Does the order of multiplication affect the product when one number is negative?

• No, it makes the product zero

• No, it does not change the product

• Yes, it changes the sign

• Yes, it changes the magnitude

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What happens when you multiply two negative numbers?

• The result is undefined

• The result is zero

• The result is negative

• The result is positive

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of -1 times -1?

• 1

• -1

• 0

• Undefined

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CCSS.3.OA.B.5

What is the result of any number multiplied by zero?

• The number itself

• Zero

• A negative number

• An undefined number

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of 12 times -4?

• 48

• Undefined

• -48

• 0

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CCSS.3.OA.C.7

What is the result of 7 times 3?

• 10

• 21

• 30

• 0

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of -5 times -10?

• 0

• 50

• Undefined

• -50

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B