Exploring Multiplying Rational Numbers

What is the first step when multiplying fractions?

• Find a common denominator

• Subtract the fractions

• Convert mixed numbers to improper fractions

• Add the fractions

When multiplying fractions, do you need a common denominator?

• Yes, always

• No, never

• No, only for adding and subtracting

• Yes, but only for mixed numbers

What should you do with the decimal point when multiplying decimals?

• Line it up with the other decimal point

• Move it to the left

• Move it to the right

• Ignore it until the end

How do you determine the placement of the decimal point in the final answer when multiplying decimals?

• Count the total number of digits behind the decimal points in the problem

• Move the decimal point two places to the left

• Line up the decimal points before multiplying

• Move the decimal point two places to the right

If you have an even number of negative signs in a multiplication problem, what will the sign of the answer be?

• Positive

• Negative

• Zero

• Undefined

In the problem 68.7 times -5, what is the correct placement of the decimal point in the final answer?

• One place to the right

• Two places to the right

• Two places to the left

• One place to the left

When converting a mixed number to an improper fraction, what is the correct formula?

• Whole number times the denominator plus the numerator

• Numerator times the whole number plus the denominator

• Denominator times the whole number plus the numerator

• Whole number plus the numerator times the denominator

What is the result of multiplying -3 1/4 by 5/6?

• 65/24

• 3 1/4

• 13/4

• 5/6

In the final example, what is the improper fraction form of 1 4/5?

• 5/4

• 4/5

• 5/9

• 9/5

What is the final simplified form of 99/10?

• 9 1/10

• 10 1/10

• 9 9/10

• 10 9/10