Understanding Cross Products and Ratios

The video tutorial explains how to solve for 'a' using the cross products property by multiplying and dividing numbers. It also presents an alternative method by recognizing the relationship between ratios and using division to solve the problem. Both methods lead to the same solution, demonstrating different approaches to solving equations.

What is the first step in solving for 'a' using the cross products property?

• Divide 18 by 6

• Multiply 2 by 9

• Subtract 2 from 9

• Add 6 to 9

Tags

CCSS.5.OA.B.3

After multiplying 2 by 9, what is the next step to find 'a'?

• Subtract 3

• Divide by 6

• Multiply by 3

• Add 6

Tags

CCSS.5.OA.B.3

How can you go from 6 to 2 in the alternative method?

• Divide by 3

• Subtract 2

• Multiply by 3

• Add 4

Tags

CCSS.2.OA.A.1

What operation is applied to 9 in the alternative method to find 'a'?

• Subtract 3

• Multiply by 2

• Divide by 3

• Add 6

Tags

CCSS.7.NS.A.1D

Which two methods can be used to solve for 'a'?

• Cross multiplication and addition

• Subtraction and division

• Cross multiplication and division by 3

• Addition and multiplication

Tags

CCSS.7.NS.A.1D