Multiplying and Dividing Rational Numbers

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Tags

CCSS.5.NBT.A.2

Front

How do you multiply two fractions?

Back

To multiply two fractions, multiply the numerators together and multiply the denominators together. For example, (a/b) x (c/d) = (a*c)/(b*d).

Tags

CCSS.5.NF.B.6

Front

What is the simplest form of a fraction?

Back

The simplest form of a fraction is when the numerator and denominator have no common factors other than 1.

Front

How do you divide fractions?

Back

To divide fractions, use the KCF method: Keep the first fraction, Change the division sign to multiplication, and Flip the second fraction. Then multiply.

Tags

CCSS.6.NS.A.1

Front

What is the result of 3/9 x 3/4 in simplest form?

Back

1/4

Tags

CCSS.5.NF.B.6

Front

If a trail is 8.54 miles long and someone rides around it 4 times, how do you find the total distance traveled?

Back

Multiply the length of the trail by the number of times ridden: 8.54 miles x 4 = 34.16 miles.

Tags

CCSS.6.NS.B.3

Front

How many runners are needed for a 1/4 mile relay race if each runner runs 1/16 mile?

Back

4 runners are needed because 1/4 ÷ 1/16 = 4.

Tags

CCSS.5.NF.B.7A

CCSS.5.NF.B.7C

Front

What is the cost of one rose if a dozen roses cost $29.88?

Back

The cost of one rose is $2.49, calculated by dividing $29.88 by 12.

Tags

CCSS.7.EE.B.3

Front

What does KCF stand for in dividing fractions?

Back

KCF stands for Keep, Change, Flip.

Tags

CCSS.6.NS.A.1

Front

What is the product of 2/3 and 3/5?

Back

The product is 2/5.

Tags

CCSS.5.NF.B.6