Add and Subtract Fractions
Using Models
Rename Fractions and Mixed Numbers
Add and Subtract Mixed Numbers
Properties of Addition
100
3/5 + 1/5 =
4/5
100
Using models show 5/8 - 3/8.
1/4
100
Another phrase for this is a fraction greater than 1.
What is an improper fraction?
100
7 5/8 - 4 3/8
What is 3 1/4?
100
The order of the addends change around an addition sign.
What is the commutative property?
200
6/8 - 2/8 =
1/2
200
Using models, show 6/8 + 4/8
1 1/4
200
16/5 written as a mixed number.
3 1/5
200
10 1/5 + 4 4/5
What is 15.
200
The grouping of the addends changes. The parenthesis slide and regroup two addends.
What is the associative property?
300
Janae's dance class learned 1/5 of a new dance on Monday, and 2/5 of the dance on Tuesday. What fraction of the dance is left for the class to learn on Wednesday?
2/5 of the dance is left for the class to learn on Wednesday.
300
In a survey 6/12 of the students chose Mr. Lemoncello's Library, 4/12 chose Rump, and 2/12 chose Real Boy as their favorite book. Using a model, show how many more students chose Mr. Lemoncello's Library than Rump.
2/12 or 1/6 more students chose Mr. Lemoncello's Library than Rump.
300
5 7/10 written as a fraction greater than 1.
57/10
300
4 6/10 - 1 8/10
What is 2 4/5.
300
1 3/6 + (2 5/6 + 5 1/6) = 1 3/6 + (5 1/6 + 2 5/6)
What is an example of the commutative property?
400
Write 9/10 as a sum of fractions with 5 addends. Daily Double!
1st table to give two answers, gets the points.
400
In a survey 6/12 of the students chose Mr. Lemoncello's Library, 4/12 chose Rump, and 2/12 chose Real Boy as their favorite book. Using a model, show how many students preferred Mr. Lemoncello's Library and Real Boy.
8/12 or 2/3 students preferred Mr. Lemoncello's Library and Real Boy.
400
Use renaming to add. 4 2/3 + 3 2/3
14/3 + 11/3 = 25/3 = 8 1/3
400
Sabrina drew 3 6/8 lizards and 2 3/8 flowers on her paper. How many lizards and flowers has Sabrina drawn on her paper?
Sabrina drew 6 1/8 lizards and flowers on her paper.
400
(34/9 + 22/9) + 5/9 = 34/9 + (22/9 + 5/9)
What is an example of associative property?
500
Kiera brought 8/12 bags of trail mix on a camping trip. She drank 6/12 bags of trail mix. How much was left?
Kiera had 1/6 bags of trail mix left.
500
How do you rename a mixed number as a fraction greater than 1? Daily Double!
Multiply the denominator by the whole number then add the numerator. This gives you the numerator of your improper fraction and put it over the original denominator.
500
Use renaming to subtract. 4 3/7 - 2 5/7
31/7 - 19/7 = 12/7 = 1 5/7
500
Gabriel walks 2/3 miles to school each day. He walks the same distance home. How far does he walk to and from school during a regular school week (5 days)?
Gabriel walks 6 2/3 miles during a regular school week.
500
Sienna enjoys riding her bike. During a 4 day biking trip, she rode 8 1/8 miles, 4 3/8 miles, 2 7/8 miles, and 6 1/8 miles. How many more miles until she rides 27 miles in all?
Sienna will need to bike 5 4/8 more miles.