Math 131 Study Guide Exam #1
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10 Terms
When multiplying fractions, what is the formula?
When dividing fractions, what is the formula?
How do you turn a problem from a fraction dividing another fraction to a fraction multiplying with another fraction?
Flip the second fraction and multiply by it.
How do we add and subtract fractions with denominators that are not the same?
Find the LCD and if it doesn’t have one then multiply each denominator by the other one to find a LCD or multiply both denominators to get a LCD.
When adding and subtracting fractions, do you sum or subtract the denominator?
No, you don’t change the denominator if its the same, but if it’s different you must figure out the LCD.
How do you reduce a fraction?
By reducing them cross ways.
How do you find the LCD between two numbers?
Count the smallest number up and try to find a common number
What is the formula when subtracting exponents?
Can you subtract exponents from top to bottom on a fraction?
Yes
If I want to cancel exponents out of a fraction, how do I do that?
Add and subtract them