Comparing and Order Fractions with Unlike Denominators Copyright © 2013 Kelly Mott

Comparing and Order Fractions with Unlike

Denominators

Copyright © 2013 Kelly Mott

Comparing FractionsPart 1: ReviewPart 2: Lesson


REVIEW


FOCUS QUESTION: What symbols do we

use when we compare fractions?


Symbols

means ______________________.

means ______________________.

means ______________________.


FOCUS QUESTION: How do we compare

fractions with different denominators?


• There are two ways to compare fractions with different denominators.


• If fractions do not have the same denominators, we need to find a common multiple and multiply to get the bottoms the same.

2 4

3 8


4 3 8 4

Practice 1:


2 1 3 6

Practice 2:


• Another way to compare fractions is to use the butterfly method and cross multiply.

2 4

3 8


2 3 5 10

Practice 1:


1 2 3 9

Practice 2:


How did you do?


FOCUS QUESTION: How do we find the fraction with the greatest value

in a set?


• To find the fraction with the greatest value, you must first make all the fractions have a common denominator.

• Circle the fraction with the greatest value.

7 10

2 5


10 9



3 8

2 4


6 2



4 6

6 12


10 7



3 10

4 5


20 12



4 6

1 3


12 7

FOCUS QUESTION: How do we put fractions in order from greatest to

least?


• To put fractions in order from greatest to least, find the common denominator. Then list from big to small.

• Order from Greatest to Least:

2 5

1 3


10 3



3 4

5 8


2 1



2 4

2 3


12 7

FOCUS QUESTION: How do we put fractions in

order from least to greatest?


• To put fractions in order from least to greatest, find the common denominator. Then list from small to big.

• Order from Least to Greatest:

4 12

1 3


4 3

• To put fractions in order from least to greatest, find the common denominator. Then list from small to big.

• Order from Least to Greatest:

4 12

1 3


6 5


• Least to Greatest:

3 5

12 20


10 5

PRACTICE: Word Problems


1. Amy’s math notebook weighs ½ pound, her science notebook weighs 7/8 pound, and her history notebook weighs ¾ pound. What are the weights in order from lightest to heaviest?

Question: Steps:

Solve: Answer in Words:


2. Carl has three picture frames. The thicknesses of the frames are 4/5 inch. 3/12 inch, and 5/6 inch. What are the thicknesses in order from least to greatest?

Question: Steps:

Solve: Answer in Words:


How did you do?



Documents

Comparing and Order Fractions with Unlike Denominators Copyright © 2013 Kelly Mott