Experimental Probability - actually doing the trails

Theoretical Probability - what you expect to happen

Opposite integers have the same numeral but different sign.

Example: 3 and (-3)

Divisible - means when a number can be divided by another number with no remainder or decimal. 

It is a whole number.

Divisibility Rules
0 - ends in zero
1 - all numbers
2 - even numbers
3 - sum of the digits is3
4 - divisible by 2, twice
5 - ends in a 0 or 5
6 - divisible by 2 and 3
8 - divisible by 2, thrice
9 - sum of the digits is 9
10 - ends in zero

Transformations
Translation - to slid along a straight line
Rotations - to turn around a fixed point
Reflection - a mirror image

What is a Value?

A Value is any known or calculated amount.

What is a Variable?

A Variable is a letter that represents an unknown number.

What is a number coefficent?

A Number Coefficent is a number that multiplies the variables.

Expression Word Problem

A group of students are talking. 2 friends leave the group. Write an expression for the number of students in the group after the 2 leave...
Answer: S-2 or G-2
Because, the question says "a group of students" it does not tell us how many students are in the group. Therefore we use a variable since the number is unknown.
And, 2 because the question states that 2 students leave the group.
S = students and G = group

You can use either one.

Expression

Expression is any single number or varible, or combinations of operations involving numbers and varibles
E.g. 5, n, 8t, x+1, 2y-7

Rule for 1

All whole numbers are divisible by 1
Example: 1,2,3,4,5,6,7,8,9

Rule for 5

All numbers that end in 0 or 5.

Example:
5,10,15,20,25,30,35,40,45

Numerators and Denominators

A numberator is the top number of a fraction
A denominator is the bottom number of a fraction and it tells how many equal parts are in a whole.

Example:

Divisibility rule for 10

All numbers that end in 0 are divisible by 10.

eg: 10, 20, 30, 40, 50, 60, 70, 80, 90.

Order of operations

4 x 3 + 12 / 2
(4x3) = 12 / 2
12 + 12 / 2
12 + 6
= 18

Brackets
Exponents
Division
Multiplication
Aaddition
Subtraction

http://youtu.be/oyGG4caBG4k

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