Add/Subtract Fractions and Mixed Numbers
Find the sum. Write your answer in simplest form.
1/3 + 2/3 =
1
Use benchmark fractions to estimate the sum.
8/9 + 5/6 =
1 + 1 = 2
Use a common denominator to write an equivalent fraction for each fraction.
2/3, 3/7
14/21, 9/21
Find the difference. Write your answer in simplest form.
2/3 - 7/12
1/12
Use benchmark fractions to estimate the difference.
2/3 - 1/8
1/2 - 0 = 1/2
Which property is being shown here?
1/6 + (5/6 + 7/8) = (1/6 + 5/6) + 7/8
Associative
Add. Write your answer in simplest form.
3/8 + 5/6 =
1 5/24
Use benchmarks to estimate the sum.
3 1/4 + 4 7/12 =
Best answer: 3 1/2 + 4 1/2 = 8
Another acceptable answer: 3 + 4 1/2 = 7 1/2
Fill in all three vocab words (in order):
A number that is made up of a whole number and a fraction is called a ____________________.
A common multiple of two or more denominators is called a ______________________________.
When you are adding two numbers you are finding the ________.
mixed number
common denominators
sum
Add. Write your answer in simplest form.
3 11/12 + 4 5/6
8 9/12 or 8 3/4 (both answers are acceptable)
Use benchmarks to estimate the difference.
10 5/6 - 2 3/8 =
11 - 2 1/2 = 8 1/2
Use addition properties to solve. Write your answer in simplest form.
(5 3/4 + 3 7/10) + 3/4 =
(5 3/4 + 3/4) + 3 7/10 =
6 6/4 + 3 7/10 =
7 2/4 + 3 7/10 =
7 1/2 + 3 7/10 =
7 5/10 + 3 7/10 =
10 12/10
Final answer: 11 2/10 or 11 1/5
Find the difference. Write your answer in simplest form.
24 1/4 - 6 6/8 =
17 1/2
Charlotte babysat for 3 7/12 hours on Friday. She babysat for 2 5/6 hour on Saturday. About how long did Charlotte babysat on both days combined?
3 1/2 + 3 = 6 1/2 hours
Cheryl has 5 ft of ribbon. She cuts a 3 3/4 feet strip to make a hair bow. Then she cuts a 5/6 foot strip for a border on a scrapbook page. How much ribbon is left? Is there enough ribbon for Cheryl to cut two 1/3 foot pieces to put on a picture frame?
5/12 foot of ribbon left
No (1/3 + 1/3 = 2/3, which is more than 5/12)