1. 0-4/0-5 Operations with Fractions
Goals:
Add, subtract, multiply and divide fractions.

2. Vocabulary Numerator – top number in a fraction
Denominator – bottom number in a fraction

3. Adding and Subtracting Fractions
Two methods:
Get a common denominator and add or subtract numerators.
Example:
Use a calculator.
Example:

4. IMPORTANT!!! Things to remember when using a calculator:
Fractions should ALWAYS be in parenthesis
Mixed numbers are put in as an addition problem
To get a fraction for an answer press:
MATH >FRAC

5. Examples Find each sum or difference. 3 5 + 1 5 3 8 − 1 3 4 5 + 7 10
2 5 − 3 4
4 5
1 24
1 1 2
− 7 20

6. Practice
Page P16 #11-16

7. Multiplying Fractions
Two methods:
Multiply across.
Example: 1 2 ∙ 2 3
Use a calculator.
Example: 3 5 ∙ 7 9

8. Dividing Fractions Two methods: Multiply by the reciprocal.
Example: 4 7 ÷ 2 5
Use a calculator.
Example: 2 9 ÷ 3 5

9. Examples Find each product or quotient. 2 5 ∙ 1 3 3 5 ∙1 1 2 1 4 ∙ 2 9
− 3 4 ∙ 3 8
2 15
9 10
1 18
− 9 32

10. Examples
1 3 ÷ 1 2
3 8 ÷ 2 3
− 2 3 ÷ 4 5
7 8 ÷−2 1 3
2 3
9 16
− 5 6
− 3 8

11. Practice
Page P19 #10-15
#31-36

12. Homework
Page P16 #17-25
Page P19 #16-21, 37-42