Mastering Multiplication and Division of Rational Numbers

Mr. Morrow introduces lesson 2.4, focusing on multiplying and dividing rational numbers, including fractions, mixed numbers, and decimals. The lesson covers essential questions, learning objectives, and the concept of reciprocals. It explains the rules for multiplying and dividing integers and provides examples of multiplying and dividing fractions and decimals. The lesson concludes with a summary and encouragement to seek further assistance if needed.

What is the essential question of this lesson?

• How to add and subtract rational numbers?

• How to multiply and divide rational numbers?

• How to solve linear equations?

• How to find the area of a circle?

What does the term 'reciprocal' mean in the context of dividing fractions?

• Adding the fractions

• Subtracting the fractions

• Flipping the fraction

• Multiplying the fractions

Tags

CCSS.6.NS.A.1

When dividing fractions, what operation do we turn the problem into?

• Multiplication

• Subtraction

• Division

• Addition

Tags

CCSS.6.NS.A.1

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

• Undefined

• Zero

• Positive

• Negative

Tags

CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

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

• Negative

• Positive

• Zero

• Undefined

Tags

CCSS.7.NS.A.2B

In the example of multiplying fractions, what is the product of 2/3 and 2/5?

• 2/15

• 4/10

• 2/10

• 4/15

Tags

CCSS.5.NF.B.6

When simplifying the fraction 12/30, what is the final simplified form?

• 6/15

• 4/10

• 2/5

• 1/3

What is the result of dividing -4/6 by 5/3 after flipping the second fraction?

• 12/30

• -12/30

• -2/5

• 2/5

Tags

CCSS.7.NS.A.2B

What is the result of dividing 2.5 by 3.2 rounded to the nearest hundredth?

• 0.78

• 0.79

• -0.78

• -0.79

Tags

CCSS.7.EE.B.3

What is the product of -2.5 and 3.2?

• 8

• -8

• 7.5

• -7.5

Tags

CCSS.7.NS.A.2A