Multiplying and Simplifying Fractions

This video tutorial covers the multiplication of rational numbers, including both negative numbers and fractions. It begins with basic examples of multiplying negative numbers, emphasizing the rule that two negatives make a positive. The tutorial then moves on to multiplying fractions, demonstrating how to handle negative fractions and the importance of simplification. A technique called cross division is introduced to simplify fractions before multiplication. The video concludes with additional examples and tips, highlighting the importance of organization and checking work with a calculator.

What is the result of multiplying -2 by -3.5?

• -7

• 7

• -5.5

• 5.5

When multiplying -3 by -1.25, what is the correct product?

• -3.75

• -2.5

• 3.75

• 2.5

What is the simplified result of multiplying 2/3 by -1/2?

• 2/3

• -2/3

• 1/3

• -1/3

How do you simplify the product of -2/3, -1/2, and -3/5?

• 2/5

• -2/5

• 1/5

• -1/5

What is the result of multiplying -3/4 by -4/7?

• -3/7

• -3/14

• 3/7

• 3/14

Which technique helps simplify fractions before multiplication?

• Cross-subtraction

• Cross-division

• Cross-multiplication

• Cross-addition

What is the final simplified form of multiplying 2/3 by -9/10 by 5/6?

• -1/2

• 1/2

• 1/3

• -1/3

If you multiply an odd number of negative numbers, what is the sign of the result?

• Positive

• Negative

• Undefined

• Zero

Why is it important to show all your work when solving problems?

• To confuse others

• To avoid mistakes

• To impress the teacher

• To save time

When is it particularly helpful to use a calculator for verification?

• When working with percentages

• When working with decimals

• When working with fractions

• When working with whole numbers