Problem Solving
Natalie spends 2 1/3 hours baking muffins. Then he spends 3 1/2 hours making bread. How much time does Nathanial spend baking?
5 5/6
5/6 + 7/10
1 + 1/2 = 1 1/2
Adding Fractions
1/8 + 3/4?
7/8
4 5/8 + 3/8
5
What is the first step adding fractions with unlike denominators?
Find a common denominator or LCM
Look at the equation.
2/5 + 1/4 = 13/20
Is the answer reasonable? Explain your reasoning.
Yes. The estimated value should be close to 13/20
2/5 = 8/20
1/4 = 5/20
8/20 + 5/20 = 13/20
3/7 + 1/10
1/2 + 0 = 1/2
Adding Fractions
3/10 + 2/6
18/60 OR 3/10
7 5/5
8
What is the second step when adding fractions with unlike denominators?
Find equivalent fractions
Convert the fractions so they have the same denominator
Draw a fraction strip to find the sum. Write the answer in simplest form.
1/8 + 3/4
7/4
7/12 + 4/5 + 4/9
1/2 + 1 + 1/2 = 2
Adding Fractions
2 2/5 + 1 1/3
3 11/15
8 13/7
9 6/7
What is the third step when adding fractions with unlike denominators?
Add or subtract
The cord on Marsha's fan is 9 1/2 feet long. She has an extension cord that makes it 3 3/4 feet longer. How much is the cord with the extension cord included?
13 1/4
3/5 + 9/10
1/2 + 1 = 1 1/2
Adding Fractions
6/15 + 3/10
7/10
2 1/4 + 8 3/4
11
What is the fourth step when adding fractions with unlike denominators?
Simplify
This is the mascot of the New England Patriots, and he is dressed like a soldier from the American Revolution.
Pat Patriot
5/6 + 8/10
1+ 1 = 2
Adding Fractions
1 1/3 + 4/5
2 2/15
2 16/15
3 1/15
What is the fifth step with adding fractions with unlike denominators?
Check your answer/work - CIRCLE YOUR ANSWER