Reducing and Multiplying Ratios

Jimmy Chang explains how to multiply ratios, often involving fractions. He discusses two strategies: multiplying first and reducing later, or reducing fractions before multiplying. He provides examples for both methods, emphasizing the importance of simplifying fractions. The video concludes with a summary of the strategies.

What is the common scenario when multiplying ratios?

• Multiplying percentages

• Multiplying fractions

• Multiplying decimals

• Multiplying whole numbers

What is the first step in the 'multiply first, reduce later' strategy?

• Subtract the fractions

• Add the fractions

• Multiply the numerators and denominators

• Reduce the fractions

In the example 3/4 * 2/5, what is the product before reduction?

• 6/20

• 3/5

• 1/2

• 2/3

What common factor is used to reduce 6/20?

• 5

• 3

• 4

• 2

What is the alternative strategy to 'multiply first, reduce later'?

• Add first, then multiply

• Multiply only the numerators

• Subtract before multiplying

• Reduce before multiplying

What is the first step in the 'reduce before multiplying' strategy?

• Add the fractions

• Reduce the fractions

• Subtract the fractions

• Multiply the fractions

In the example 2/3 * 12/15, which numbers can be reduced before multiplying?

• 12 and 3

• 2 and 3

• 12 and 15

• 2 and 15

What is the result of reducing 12/3 in the example?

• 4

• 3

• 5

• 6

Which strategy involves cross-cancellation?

• Multiply first, reduce later

• Reduce before multiplying

• Add before multiplying

• Subtract before multiplying

What is the benefit of reducing fractions before multiplying?

• It makes the final multiplication easier

• It increases the final result

• It decreases the final result

• It makes the fractions larger