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Mathematic Equations,[object Object],By Natalie Hathaway,[object Object],By Natalie Hathaway,[object Object]
Calculating Mathematical Equations,[object Object]
What IS that?,[object Object]
A VARIABLE IS…,[object Object]
a quantity that during a ,[object Object],calculation is assumed to change or be capable of varying in value,[object Object]
You can choose anything to be your variable!,[object Object]
Mathematical Equations
We usually use X or Y,[object Object]
Using Variables in Equations…,[object Object]
Your variable, x or y, are included in the equation.,[object Object]
WHAT DO X AND Y STAND FOR?,[object Object]
It’s like a mystery!,[object Object]
To find out what a variable equals, you must isolate it.,[object Object]
For Example:,[object Object],X + 3 = 7,[object Object],X + 3 – 3 = 7 – 3,[object Object],X = 4,[object Object]
When X was alone, we found its value.,[object Object]
Equations with..,[object Object]
Parentheses!(3 x 4) x (2 + 5),[object Object]
Exponents!32 + (5 -2),[object Object]
Multiplication!32 + (5 – 2) x 4,[object Object]
Division!32 + (5 – 2) x 4 / 3,[object Object]
Addition!32 + (5 – 2) x 4 / 3 + 7,[object Object]
subtraction!32 + (5 – 2) x 4 / 3 + 7 - 2,[object Object]
Or, equations containing all of those operations.,[object Object],x2,[object Object]
To solve these equations, we must know & use a new rule…,[object Object]
If you remember this….,[object Object]
Mathematical Equations
You can calculate almost ANY math equation!,[object Object]
Please Excuse my dear aunt Sally stands for...,[object Object]
Mathematical Equations
This is also known as the order of operations,[object Object]
Which tells us what to do first in an equation that contains multiple operations.,[object Object]
Calculators automatically follow this rule.,[object Object]
While doing a problem, write down PEMDAS for visual reference..PEMDAS,[object Object]
EXAMPLE PROBLEM..,[object Object]
PEMDAS,[object Object],(3 + 1) + 32 x 4 / 2 + 7 – 1 = y,[object Object],= 4 + 32 x 4 / 2 + 7 – 1 = y,[object Object],= 4 + 9 x 4 / 2 + 7 – 1 = y,[object Object],= 4 + 36 / 2 + 7 – 1 = y,[object Object],= 4 + 18 + 7 – 1 = y,[object Object],= 29 - 1 = y,[object Object],= y = 28,[object Object]

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