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Common Denominators
Copyright © 2013 Kelly Mott
Common DenominatorsPart 1: Lesson
Copyright © 2013 Kelly Mott
FOCUS QUESTION: How do I make fractions have
common denominators?
Copyright © 2013 Kelly Mott
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.
Copyright © 2013 Kelly Mott
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34
and
PRACTICE: Let’s try a few!
Copyright © 2013 Kelly Mott
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.
Copyright © 2013 Kelly Mott
310
12
and
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.
Copyright © 2013 Kelly Mott
35
34
and
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.
Copyright © 2013 Kelly Mott
24
78
and
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.
Copyright © 2013 Kelly Mott
23
512
and
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.
Copyright © 2013 Kelly Mott
14
16
and
PRACTICE: Now let’s tell if each pair of fractions is
equivalent.
Copyright © 2013 Kelly Mott
Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.
Copyright © 2013 Kelly Mott
12
26
Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.
Copyright © 2013 Kelly Mott
34
56
Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.
Copyright © 2013 Kelly Mott
68
34
Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.
Copyright © 2013 Kelly Mott
610
35
Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.
Copyright © 2013 Kelly Mott
34
23
Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.
Copyright © 2013 Kelly Mott
34
56
Remember that equivalent fractions are equal. They are worth the same. Find the common denominator. Then use = or = to show whether they are equivalent.
Copyright © 2013 Kelly Mott
14
312
PRACTICE: Word Problems
Copyright © 2013 Kelly Mott
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:
Copyright © 2013 Kelly Mott
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:
Copyright © 2013 Kelly Mott
How did you do?
Copyright © 2013 Kelly Mott
Copyright © 2013 Kelly Mott
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