Multiplying Rational Numbers: Key Concepts and Techniques

What is the main rule to remember when multiplying rational numbers?

• Same sign positive, opposite sign negative

• Always positive

• Same sign negative, opposite sign positive

• Always negative

What should you do first when multiplying fractions?

• Multiply numerators and denominators directly

• Simplify the fractions if possible

• Convert fractions to decimals

• Add the fractions

What happens if you simplify fractions before multiplying?

• You will need to simplify again after multiplying

• You will not need to simplify after multiplying

• The fractions will become improper

• The fractions will become mixed numbers

In the first example problem, what is the final product of the multiplication?

• -7/2

• 7/2

• -2/7

• 2/7

In the second example problem, what is the final product of the multiplication?

• -2/5

• 2/5

• -5/2

• 5/2

What is the greatest common factor (GCF) of 3 and 9?

• 1

• 3

• 6

• 9

How do you rewrite a whole number as a fraction?

• By putting it over one

• By subtracting one

• By adding a decimal point

• By multiplying by zero

What is the final product when multiplying -3 and 1/4?

• -3/4

• 3/4

• -1/4

• 1/4

When multiplying decimals, what should you do after multiplying the numbers?

• Ignore the decimal places

• Subtract the decimal places from the product

• Multiply the decimal places

• Add the decimal places from both factors to the product

What is the final product of multiplying -3.2 and -6?

• 19.2

• -18.6

• -19.2

• 18.6