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 = 500000 5*10^2/(1*10^3) = 0.5

??10*1

10*53

2

Calculator Example

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

??10*1

10*53

2

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 +5 +5 X =12

Graphing

Always label axes Always have Title Take up most of

page Appropriate scale

X-axis

Y-a

xis

Title

Any of these Correct?

X-axis

Title

Y-a

xis

X-axis

Title

Y-a

xis

Appropriate Scale

All increments have to be EQUAL

XXX XXX X

Y

Y

Y

Y

Appropriate Scale??

XXXXX X

Y

Y

Y

Y

All increments have to be EQUAL

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

g

kg

1000

1

ft

in

1

12

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

cmm

cmm 100

1

100*1

Metric System Table

103 102 101 100 10-1 10-2 10-3

kilo m, L, g deci centi milli

k d c m

Number

Prefix

Symbol

Power of 10

Base Unit

1kg ??g

103 102 101 100 10-1 10-2 10-3

kilo gram deci centi milli

kg g dg cg mg

1. 0 0 0Number

Prefix

Symbol

Power of 10

1kg 1000g

103 102 101 100 10-1 10-2 10-3

kilo gram deci centi milli

kg g dg cg mg

1 0 0 0.Number

Prefix

Symbol

Power of 10

10mL ??L

103 102 101 100 10-1 10-2 10-3

kilo Liter deci centi milli

kL L dL cL mL

0 0 0 1 0.Number

Prefix

Symbol

Power of 10

10mL 0.01L

103 102 101 100 10-1 10-2 10-3

kilo Liter deci centi milli

kL L dL cL mL

0. 0 1 0Number

Prefix

Symbol

Power of 10

Weighted Average

Average where all numbers are not equally weighted

Must take into account weight of each number Example: Your Grade

Example

HW(30%) 100 Labs(20%) 90 Test(50%) 85

Grade = .3*100+.2*90+.5*85=90.5