LCD/Add and Subtract Fractions with unlike Denominators

Front

What is the Least Common Multiple (LCM)?

Back

The Least Common Multiple (LCM) of two or more numbers is the smallest multiple that is exactly divisible by each of the numbers.

Front

How do you find the LCM of 9 and 6?

Back

List the multiples of each number: Multiples of 9: 9, 18, 27, 36...; Multiples of 6: 6, 12, 18, 24...; The LCM is 18.

Front

What is a mixed number?

Back

A mixed number is a whole number combined with a proper fraction, such as 2 1/2.

Tags

CCSS.3.NF.A.3C

Front

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

Back

Divide the numerator by the denominator. The quotient is the whole number, and the remainder over the original denominator is the fraction.

Front

Convert 14/3 to a mixed number.

Back

14/3 = 4 2/3.

Front

What is the process to subtract fractions with unlike denominators?

Back

1. Find the LCM of the denominators. 2. Convert each fraction to an equivalent fraction with the LCM as the new denominator. 3. Subtract the numerators and keep the common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the difference of 7/8 - 1/3?

Back

The difference is 13/24.

Tags

CCSS.7.NS.A.1C

Front

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

Back

Multiply the whole number by the denominator, add the numerator, and place that result over the original denominator.

Front

Convert the mixed number 10 1/2 to an improper fraction.

Back

10 1/2 = (10 * 2 + 1)/2 = 21/2.

Front

What is an improper fraction?

Back

An improper fraction is a fraction where the numerator is greater than or equal to the denominator, such as 9/4.

Tags

CCSS.3.NF.A.3C