multiplying and dividing fractions

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

How do you multiply two fractions?

Back

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

Tags

CCSS.5.NF.B.6

Front

What is the result of multiplying 2/6 x 3/5?

Back

1/5

Tags

CCSS.5.NF.B.6

Front

How do you divide a fraction by a whole number?

Back

To divide a fraction by a whole number, multiply the fraction by the reciprocal of the whole number. For example, a/b ÷ c = a/b x 1/c.

Tags

CCSS.6.NS.A.1

Front

What is the reciprocal of a fraction?

Back

The reciprocal of a fraction is obtained by flipping the numerator and denominator. For example, the reciprocal of a/b is b/a.

Front

What is 2 ÷ 1/4?

Back

8

Tags

CCSS.5.NF.B.7B

CCSS.5.NF.B.7C

Front

How do you convert a mixed number to an improper fraction?

Back

To convert a mixed number to an improper fraction, multiply the whole number by the denominator and add the numerator. For example, 2 1/2 = (2*2 + 1)/2 = 5/2.

Front

What is the result of multiplying 1/2 x 1/3?

Back

1/6

Tags

CCSS.4.NF.B.4A

CCSS.4.NF.B.4B

Front

How do you simplify a fraction?

Back

To simplify a fraction, divide the numerator and the denominator by their greatest common divisor (GCD).

Front

What is the least common denominator (LCD)?

Back

The least common denominator is the smallest multiple that two or more denominators share.