6th Grade Math Textbook, Progress

Add Mixed Numbers

7-4

A stock gained 1
^38 
points on Monday and

2 
^18 
points on Tuesday. What was the total

gain for the two days?

To find the total gain, s, add: 1
^38 
 2 
^18 
s.

First estimate: 1
^38 
 2 
^18 
.

1  2  3

Then add.

To add mixed numbers with likedenominators:

Add the fractions.

Add the whole numbers.

Express the sum in simplest form.

The total gain of the stock was 3


1

2 
points.

To add mixed numbers with unlikedenominators:

Find the LCD of the fractions.

Rename each fraction as an

equivalent fraction with the

LCD as the denominator.

Add. Express the sum in

simplest form.

Study these examples.

 17  11 
^58 
 11 .
^58 

 05 
^34 
 05 .
^68 

 05 
^34 
 16 
^181 
 16  1 
^38 
 17 
^38 

 1 
^38 

 2 
^18 

 3 
^48 
 3 
^12 

s 3 


1

2 

 14 
 1

1

0 
^14 
 3

3

0 


 26 
 1

1


 5  26 
 3

2

0 


 26 
 115 
 40 
 350 
 40 
^16 

simplest

form

4

3

2

1

0

(^138)
(^218)
Add whole numbers.
Bring down the fraction.
Rename
 09
the sum.
1
3
6

 26
136

simplest form
Think
3

1
2

is close to the estimate of 3.
Think
LCD of 10
and 15 is 30.
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