# Review.

## Presentation on theme: "Review."— Presentation transcript:

Review

Review Order of Operations Using a calculator Algebra Graphing
Conversions Metric System Weighted Average

Order of Operations Please Parenthesis Excuse Exponents
My Multiplication Dear Division Aunt Addition Sally Subtraction

Using a Calculator Calculators only do what they are told, they are not psychic Calculators are programmed to follow Order of Operations

Calculator Example Type this into your calculator:
5*10^2/1*10^3 = 5*10^2/(1*10^3) = 0.5

Calculator Example E function (EE) Computer language for (^10x)
Don’t need parenthesis 5E2/1E3 = 0.5

Algebra Basic branch of math involved with solving equations with variables Basic Rule: whatever you do to one side of an equation, do the same to the other side X – 5 = 7 X =12

Graphing Always label axes Always have Title Take up most of page
Appropriate scale Y-axis X-axis

Any of these Correct? Title Title Y-axis Y-axis X-axis X-axis

Appropriate Scale All increments have to be EQUAL Y Y Y Y X X X X X X

Appropriate Scale?? All increments have to be EQUAL Y Y Y Y X X X X X

Conversions Multiplying any quantity by 1 doesn’t change the original quantity 5 x 1 = 5 5 x 2/2 = 10/2 = 5 5kg x 1000g/1kg = 5000g

Conversion Factors Quantity equal to 1 but relates two different measurements 1kg = 1000g 12in = 1ft

Metric System System of measurement based on factors of 10

Metric System Conversions
Two ways Multiply by a conversion factor Use a table

Metric System Conversion

Metric System Table 103 102 101 100 10-1 10-2 10-3 kilo m, L, g deci
centi milli k d c m Power of 10 Prefix Symbol Number Base Unit

1kg  ??g 1. 103 102 101 100 10-1 10-2 10-3 kilo gram deci centi milli
dg cg mg 1. Power of 10 Prefix Symbol Number

1kg  1000g 1 0. 103 102 101 100 10-1 10-2 10-3 kilo gram deci centi
milli kg g dg cg mg 1 0. Power of 10 Prefix Symbol Number

10mL  ??L 1 0. 103 102 101 100 10-1 10-2 10-3 kilo Liter deci centi
milli kL L dL cL mL 1 0. Power of 10 Prefix Symbol Number

10mL  0.01L 0. 1 103 102 101 100 10-1 10-2 10-3 kilo Liter deci centi
milli kL L dL cL mL 0. 1 Power of 10 Prefix Symbol Number

Weighted Average Average where all numbers are not equally weighted
Must take into account weight of each number Example: Your Grade

Example Grade = .3*100+.2*90+.5*85=90.5 HW(30%) 100
Labs(20%) 90 Test(50%) 85 Grade = .3*100+.2*90+.5*85=90.5

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