Adding Mixed Numbers with Common Denominators

Adding + Subtracting Mixed Numbers

Steps in adding or subtracting mixed numbers

• 1 - is there a common denominator? If not, find a common denominator.

• 2 - Can you add or subtract the whole numbers first? If yes, do that.

• 3 - If the first fraction has a smaller numerator than denominator, convert it into an improper fraction first.

Here is our problem. We will solve it one step at a time!

Follow along through the next few slides.

Part 1 - Let's do it together! Step one:

• Do they have a common denominator? If not, what number should we use as a common denominator?

Step 2:

We picked 12 as a common denominator. Should we convert our mixed number to an improper fraction first? Why?

Multiple Choice

• 4 22/60

• 4 22/30

• 4 22/20

• 42/20

Multiple Choice

• 4 5/12

• 4/12

• 4 1/2

• 4 1/6

Multiple Choice

• 4 5/8

• 4 10/8

• 3 5/8

• 5/8

Multiple Select