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GED Math Notes#1-11

Math Review_Rubio_Notes #All

What kind of test is the GED test? Reading and Thinking
How many steps to every word problem? Four
Step a. Read Through the whole problem
Step b. Say I can do this
Step c. Focus On Bottom Line Question
Step d. Think About The Words Of The Question
Ask What do the words mean?
What operation do I use? Add Subtract Multiply Divide
Combine and Add
How many more, how many less, what is the difference eft or any comparing words then Subtract
How many are IN something Divide
A part OF something (1/2 of 2000, 90% of salary) Multiply
Per in QUESTION means Divide (per or unit rate refers to one.)
If I know something about ONE and want to know about MORE then Multiply
If I know something about MORE and want to know about ONE, then Divide
Fractions Part of One
If the answer is a ratio, how many numbers do I need? 2
What kind of problem is it when the problem tells me something about two things and then asks me something about the SAME two things? Proportion
What do I draw on my paper when I know I have one of these problems? _______=_______
What do I put on the left line? What I Know
How do I work the problem? Cross Multiply and Divide
Decimals Part of One
Every fraction/decimal/percent can be written as A fraction decimal percent
Change a fraction to a decimal by Top Number Divided By Bottom Number
Change decimal to fraction by Read It Write It Reduce It
1/4 = .25
1/2 = .5
3/4 = .75
1/3 = .333
2/3 = .667
Percentage Part of 100
Every fraction/decimal/percent can be written as fraction/decimal/percent.
What are the three parts of a percentage problem? Part Base Rate
Triangles Part (piece of whole is) รท Base X Rate (whole /of) (percent sign)
Percent of Increase/Decrease Subtract and Divide by Original Shift =
Interest P X T (years or months/12 x R shift =
Perimeter Add around sides
Area L X W (square units) = 2
Volume L X W X H (cubic units) = 3
Mean Average; Add & Divide
Median Middle number; Order numbers first
Mode Number repeated the most
Created by: jeni25