Mastering Multiplication and Division of Rational Numbers

This video tutorial covers the multiplication and division of rational numbers, focusing on the rules for handling positive and negative signs. It emphasizes working with two numbers at a time and provides examples using whole numbers, fractions, and decimals. The tutorial concludes with complex examples and a summary of the key points.

What is the result of multiplying two positive numbers?

• Negative

• Positive

• Zero

• Undefined

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What happens when you multiply a positive number by a negative number?

• The result is zero

• The result is undefined

• The result is positive

• The result is negative

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CCSS.7.NS.A.1C

Why is it important to work with two numbers at a time?

• It simplifies the calculation

• It ensures the correct sign of the result

• It makes the process faster

• It is a rule of thumb

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of dividing a negative number by another negative number?

• Undefined

• Negative

• Zero

• Positive

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

If you have -4 * -2, what is the result?

• 8

• -8

• 0

• 2

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

What is the result of -6/3?

• 0

• 2

• -2

• Undefined

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When multiplying fractions, what should you do first?

• Convert to decimals

• Multiply the numerators and denominators

• Find a common denominator

• Add the fractions

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CCSS.6.NS.B.3

What is the result of 3.3 * 0.2?

• 0.33

• 3.3

• 6.6

• 0.66

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CCSS.7.NS.A.2B

How do you handle the signs when dividing decimals?

• Check the signs of both numbers

• Only consider the sign of the numerator

• Ignore the signs

• Only consider the sign of the denominator

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CCSS.7.NS.A.2A

What is the final result of -7/10 * -3/10?

• -7/10

• 7/10

• 21/100

• -21/100

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CCSS.7.NS.A.2A