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 product of 2/6 and 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 denominator of the fraction by the whole number. For example, (a/b) ÷ c = a/(b*c).

Front

What is 1/6 ÷ 3?

Back

1/18

Tags

CCSS.5.NF.B.7A

CCSS.5.NF.B.7C

Front

What is the result of 1/2 ÷ 8?

Back

1/16

Tags

CCSS.5.NF.B.7A

CCSS.5.NF.B.7C

Front

If Rosemary ran 2/3 of a mile, how far did Sophie run if she ran 3 times as far?

Back

2 miles

Tags

CCSS.4.NF.B.4B

CCSS.4.NF.B.4C

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

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 greatest common divisor (GCD)?

Back

The GCD is the largest number that divides two or more numbers without leaving a remainder.