Presentation Transcript
Slide 1:1 How do you add fractions?
How do you subtract fractions?
How do you multiply fractions?
Objective :2 Objective Add, subtract, and multiply fractions and mixed numbers expressing answers in simplest form.
Writing Fractions in Simplest Form :3 Writing Fractions in Simplest Form A fraction is in simplest form when the only common factor of the numerator and denominator is 1. 2 • 1 = 2
3 • 1 = 3
2. 27
36 1. List the common factors.
2. Find the GCF.
3. Divide by the GCF.
Mixed Number / Improper Fraction :4 Mixed Number / Improper Fraction When changing a mixed number to an improper fraction, you need to multiply the denominator by the integer, then add the numerator to the product.
Rewrite 4 1/2 as an improper fraction.
9/2
Adding Fractions :5 Adding Fractions Check for common denominators.
Once the denominators are the same, add the numerators.
Always simplify your answer.
Find the Sum :6 Find the Sum 8/9 + 2/9 =
9/16 + 4/32 =
8 2/3 + 6 1/2 = 10/9 = 1 1/9
22/32 = 11/16
14 7/6 = 15 1/6
Subtracting Fractions :7 Subtracting Fractions Check for common denominators.
Once the denominators are the same, subtract the numerator.
Always simplify your answer.
Find the Difference :8 Find the Difference 4/5 - 2/5 =
8/12 - 4/9 =
9 - 6 5/8 = 2/5
8/36 = 2/9
2 3/8
Multiplying Fractions :9 Multiplying Fractions Simplify fractions by removing common factors or rewriting as an improper fraction.
Then, multiply the numerators and the denominators.
Don’t forget to simplify your answer.
Find the Product :10 Find the Product 3/4 • 1/2 =
3/8 • 2/5 =
2 2/3 • 3 1/4 = 3/8
6/40 = 3/20
26/3 = 8 2/3
Review! :11 Review! How do you add fractions?
How do you subtract fractions?
How do you multiply fractions?
Find the Difference, Sum, and Product :12 Find the Difference, Sum, and Product 5 - 2 3/4
4/5 + 3/10
5 1/5 • 5 5/6 2 ¼
1 1/10
30 1/3