Quadrants and BEDMAS

Quadrants

(+,+)
(-,+)
(-,- )
(+,-)

B-Brackets
E-Exponents
D-Division
M-Multiplication
A-Addition
S-Subtraction

Divisibility

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

Divisibility Rules

1- all number                                           
2- even numbers                                     
3- sum of the digits is divisible by 3         
4- divisible by two thrice
5- ends in a 0 or 5
6- divisible by 2 and 3
7- no rule
8- divisible by 2 thrice
9- sum of digits divisible by 9
10- ends in a zero

Probability

Experimental probability- actually doing the trails 


Theoretical probability- what you expect to happen

eg. flipping a coin
Experimental probability-tails  
Theoretical probability-heads

Transformations

Translation- slide along a straight line


Rotation- turn around a fixed point

Reflection- mirror image

Mean, Median, Mode, Range and Outlier

Mean- add up all values divide by how many values there are

Median- the middle number is a set of ordered values, might be the mean of 2 middle values

Mode- the value that shows up the most

Range- positive difference between largest and smallest values

Outlier- values that are too big or too small compared to the other values

What is Numerical Coefficient?

A Numerical Coefficient is a number that multiplies the variable

eg. 2t

What is a Constant?

A Constant is a number that does not change and it increases or decreases the value of an expression

eg. S-2 the constant was how much students were in the beginning, and it decreased because the expression took away two

What is a Value?

A Value is a known or calculated number

eg. 3x3=9

The 9 is the value

An Example on how to Write an Expression

An expression is any single number or variable or combination of operations (-, +, x, ÷) involving numbers and variables

A group of students are talking, 2 friends leave the group. Write an expression for the number of the students in the group after the 2 leave.

S- the students expression: S-2

2- the ones that leave

What is a Variable?

A variable is a letter that represents an unknown number

eg. x, a, n

Common Denominator

A common denominator is a common multiple of the denominators of a set of fractions.

eg. a common denominator for one fourth and one sixth is 12
because a common multiple of 4 and 6 is 12

What is a Numerator and a Denominator

The Numerator is the top number of the fraction and tells us how many equal parts of the whole we have or are dealing with.

The Denominator is the bottom number of a fraction and tells us how many parts the whole is divided into.

What we Learned in Math Today

Subtracting with like denominators

six sixths - two sixths =four sixths

Divisibility Rules For 2

Rule for 2

all even numbers are divisible by 2

even numbers end in 0,2,4,6,8

BEDMAS

Question: 4x3+12÷2
1.Are their any brackets or exponents? no
2.Are their any multiplication or division? yes, you have to go from left to right
3.Are their any addition or subtraction? yes, you have to go from left to right again
4x3+12÷2
12+12÷2
12+6
18
That is the answer

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