Adding and Subtracting Mixed Numbers

Front

What is a mixed number?

Back

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

Tags

CCSS.3.NF.A.3C

Front

How do you find the lowest common denominator (LCD) for two fractions?

Back

To find the LCD, list the multiples of each denominator and find the smallest multiple they have in common.

Front

What is the first step in adding or subtracting mixed numbers?

Back

Convert the mixed numbers to improper fractions.

Tags

CCSS.7.NS.A.1C

Front

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

Back

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

Front

What is the process for adding fractions with different denominators?

Back

Find the LCD, convert the fractions to equivalent fractions with the LCD, then add the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the process for subtracting fractions with different denominators?

Back

Find the LCD, convert the fractions to equivalent fractions with the LCD, then subtract the numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Why can't we just add the numerators and denominators of fractions with different denominators?

Back

Because the size of the pieces is different, and we need a common size to add them.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.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 5/4.

Tags

CCSS.3.NF.A.3C

Front

How do you simplify a fraction?

Back

Divide the numerator and denominator by their greatest common factor (GCF).

Front

What is the GCF of 8 and 12?

Back

The GCF of 8 and 12 is 4.