6th Grade Math Textbook, Progress

Update your skills. See page 12.

Subtract Fractions

7-5

The chart shows the fractional part of family

income spent on food for five countries.

How much greater is the fractional part for

China than for the U.S.A.?

To find how much greater, p, subtract:


^12 

 110 
p.

First estimate:


1

2 

 1

1

0 
 

1

2 
^0 

1

2 
.

Then subtract.

To subtract fractions:


Find the LCD of the fractions.

Rename each fraction as an

equivalent fraction with the

LCD as the denominator.

Subtract. Express the

difference in simplest form.

The fractional part of China’s family income spent

on food is greater than that of the U.S.A.’s.

2

5

Estimate and then subtract. Write each answer in simplest form.

1. 
   ^34
   2. 
   ^56
   3. 
   170
   4. .
   ^15
   5. .
   ^12
   


^58 
 
^12 
 .
^15 
 
 215 
 
 130 

6. 
   ^34
   7. 
   ^78
   8. 
   ^12
   9. 
   ^67
   10. .
   ^38
   


^23 
 
^56 
 
^25 
 
^12 
 
 1

1

0 


^12 
 


 110 


110

1 .1 0 .

5

10

1 
 5

2 
 5

p^25

Family Income Spent

on Food

India

China 


1

2 


Mexico

Japan

U.S.A. 
 110 

1

6

4

15

2

5

Think

LCD of

2 and 10

is 10.

simplest form

 101

104 ^25

Think


^2

5


is close to

the estimate of 


1

2 
.

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