Common Denominators Copyright © 2013 Kelly Mott. Common Denominators Part 1: LessonLesson Copyright © 2013 Kelly Mott

Common Denominators

Copyright © 2013 Kelly Mott

Common DenominatorsPart 1: Lesson


FOCUS QUESTION: How do I make fractions have

common denominators?


To make fractions have common denominators:1.Find the least common multiple.2.Multiply 3.Whatever you do to the top, you have to do to

the bottom.


23

34

and

PRACTICE: Let’s try a few!



the bottom.


310

12

and


the bottom.


35

34

and


the bottom.


24

78

and


the bottom.


23

512

and


the bottom.


14

16

and

PRACTICE: Now let’s tell if each pair of fractions is

equivalent.


Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.


12

26



34

56



68

34



610

35



34

23



34

56



14

312

PRACTICE: Word Problems


1. Adam drew two same sized rectangles and divided them into the same number of equal parts. He shaded 1/3 of one rectangle and 1/4 of the other rectangle. What is the least number of parts into which both rectangles could be divided?

Question: Steps:

Solve: Answer in Words:


2. Mera painted equal sections of her bedroom wall to make a pattern. She painted 2/3 of the wall white and ½ of the wall lavender. Write an equivalent fraction for each using a common denominator.

Question: Steps:

Solve: Answer in Words:


How did you do?



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Common Denominators Copyright © 2013 Kelly Mott. Common Denominators Part 1: LessonLesson Copyright © 2013 Kelly Mott