Multiplying Rational Numbers

The video tutorial explains the rules for multiplying rational numbers, including decimals, fractions, and mixed numbers. It covers how to determine the sign of the product based on the signs of the numbers being multiplied. The tutorial provides step-by-step examples for multiplying decimals, fractions, and mixed numbers, including how to simplify the results. The video concludes with encouragement to continue learning math.

What is the result when you multiply two numbers with the same signs?

• The product is undefined.

• The product is always negative.

• The product is always positive.

• The product is zero.

When multiplying -5.1 and +1.8, what is the correct product?

• +8.18

• -8.18

• +9.18

• -9.18

How do you determine the number of decimal places in the product of two decimal numbers?

• By multiplying the number of decimal places in both factors.

• By subtracting the number of decimal places in the smaller factor from the larger factor.

• By averaging the number of decimal places in both factors.

• By adding the number of decimal places in both factors.

What is the first step in multiplying mixed numbers?

• Multiply the whole numbers directly.

• Add the fractions first.

• Convert them to improper fractions.

• Simplify the fractions before multiplying.

What is the simplified form of the improper fraction -63/6?

• -10 2/3

• -11

• -10 1/3

• -10 1/2