Upload
valeria-howard
View
20
Download
1
Embed Size (px)
DESCRIPTION
Equivalent Fractions. Lesson 3-4. Vocabulary. Equivalent fractions are fractions that name the same amount. 2. 4. =. 8. 4. Creating Equivalent Fractions. Multiply the numerator and denominator by the same number. - PowerPoint PPT Presentation
Citation preview
Equivalent Fractions
Lesson 3-4
VocabularyEquivalent fractions are fractions that name the same amount.
24
= 48
Creating Equivalent Fractions•Multiply the numerator and denominator by the same number.
•Divide the numerator and denominator by the same number (it has to be a common factor to work with division)
35
We can choose any number to multiply by. Let’s multiply by 2.
x 2x 2 =
610
So, 3/5 is equivalent to 6/10.
If you have larger numbers, you can make equivalent fractions using division. Divide by a common factor.
2835
In this example, we can divide both numbers by 7.÷ 7
÷ 7= 4
528/35 is equivalent to 4/5.
Fractions in Simplest FormFractions are in simplest form when the numerator and denominator do not have any common factors besides 1.
Examples of fractions that are in simplest form:
45
211
38
Writing Fractions in Simplest Form.• Find the greatest common factor (GCF) of
the numerator and denominator.
• Divide both numbers by the GCF.
Example:
2028
201 x 20
2 x 10
4 x 5
281 x 28
2 x 14
4 x 7
20: 1, 2, 4, 5, 10, 20
28: 1, 2, 4, 7, 14, 28
Common Factors: 1, 2, 4
GCF: 4
We will divide by 4.
÷ 4÷ 4
= 57
Simplest Form
Homework Time