## Tuesday, February 21, 2012

### Key Terms Review

Do you still remember what a variable is? What about an expression? Well, here's your chance to review.

A VARIABLE is a letter that represents an unknown number.
For example, x, y, n are usually represented for an unknown number.

An EXPRESSION is any single number(3) or variable(x) or combination of operation(+) involving numbers and a variable.
For example, 2y-7.

The VALUE is a known or calculated amount.
For example, 3 is a known or calculated amount.

A CONSTANT is a number that does not change, but it increases or decreases the value of an expression.
For example, 3x+5. 5 is the constant.

A NUMERICAL COEFFICIENT is a number that multiplies the variable.
For example, 10x4 . The numerical coefficient is 10.

Do you understand now? I sure hope you do.

If you still don't, try this link:

## Saturday, February 18, 2012

### I LOVE CHEESE

Hi Everyone! CHEEESEE!

## Monday, February 13, 2012

2y + 4 2(3) + 4 6+4 10 y=3
2y + 4 2(1) + 4 2+4 6 y=1
Numirial coefficient-anumber that multiplies the variable EG.2t numiral is (2) variable is (t)
The answer is 2/3 what is the question? 1/3 + 1/3 = 2/3 3/3 - 1/3 = 2/3 2/6 + 2/6 = 4/6=2/3 by: pgrabriel

### Mr Isfelds Bedmas Question

First do brackets exponents then divide,multiply then add and subtract all steps left to right

2+3x4-5
2+12-5

14-5

Anwser 9

### Mr Isfelds Bedmas question

First do brackets then exponents divide, multiply then add and subtract left to right for all steps.

5x(2+3)+8÷4

5x5+8÷4

25+8÷4

33÷4

### Fractions with Whole Numbers

Questions...

3 2/3 - 2 1/3 = 1 1/3

2 3/6 - 2 1/6 =2/6

2 3/4 - 1 1/4 = 1 2/4

2 2/5 - 2 1/5 = 1/5

3 1/4 - 1 1/4 = 2 wholes

### Fractions

Questions...

23/40 + 7/40 = 30/40

34/40 + 6/40 = 40/40 or 1 whole

12/23 - 2/23 = 10/23

2/6 + 1/6 = 3/6 or 1 half

12/10 + 1/10 = 1 whole and 3/10

### What is a Numeral coefficient

A number that multiples the variable.

### What is a Constant

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

### What is an Expression

Any single number or variable combination of operation ( -, +, x, ÷ ) involving number.

e.g. x, a, n

### Fractions

Question...
9/10 + 1/10= 10/10 or 1 whole

50/60 + 9/60= 59/60

5/10 + 2/10= 7/10

Subtraction
10/20 - 9/20= 1/20

45/50 - 20/50 = 25/50

5/6 - 2/6 = 3/6 or 1/2

### BEDMAS Question

Question....

10+90-10x2cubed=?
10+90-10x8
10+90-80
100-80=
20

### Fractions into Pictures

Fractions into Pictures

### Question...

Question...

A group of students are playing Rock Paper
Scissors. 2 students leave the group.
Group of Students=unknown amount
Take away 2 from group of students.
s=Variable
2= Constant

### What is an Expression

What is an Expression?
An Expression is any single number or variable, or combination of operations (-,+,x,/) involving numbers and variables.
e.g. 5,n,8t,xt1,2y,-7

### Divisibilty rule for 1

Rule for 1

All whole numbers are divisible by 1

EG. 3÷1=3
111÷1=1

### What is a Variable

What is a Variable?

A Variable is a letter that represents an unknown number.

e.g. x,a,n
(it could be any number)

BRACKETS
EXPONENTS
DIVISION
MULTIPLICATION
SUBTRACTION

### Value , Constant and Numeral Coefficent

Value- A known or calculated amount

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

Numeral Coefficient- A number that multiples that variable

Eg. 2+ 2 is the Numeral coefficient + is the variable
Number Coefficient : a number that multiplies the variable.

Example :
2t.

### Number of the Day

Use any two digits to make a proper fraction
Eg. 1234.567
Just make a fraction from any of those seven numbers

Here is one of them

2/6

## Sunday, February 12, 2012

### BEDMAS QUESTION

Bedmas question:

(10x40) /2+15-20x2=
Brackets? -Yes .
400 /2+15-20x2
Exponents? -No.
Division or Multiplication? -Yes. Division
200+15-20x2
Division or Multiplication? -Yes. Multiplication
200+15-40
215-40
Addition or Subtraction? -Yes. Subtraction

### BEDMAS question on February 10

The V with the line means square root.
We didn't learn much about it. Isfeld did however tell me it was almost like dividing so you add it in with division and multiplication. You would do the square root after brackets and exponents before division because it goes left to right.

The rest is the same thing we usually do:
Brackets
exponents
division and multiplication

### What is a mixed number?

A mixed number is a number made up of a whole number and a fraction.

eg.

### BEDMAS Question

8+6x2x3-(15-13)
Brackets? Yes
15-13=2
8+6x2x3-2
Exponents? No
Multiplication or Division? Multiplication
6x2=12
8+12x3-2
Multiplication AGAIN
3x12=36
8+36-2
8+36=44
44-2
Addition or Subtraction? Subtraction
44-2

### BEDMAS Question

2+3x4-5
Brackets? No
Exponents? No
Multiplication or Division? Multiplication
3x4=12
2+12-5
2+12=14
Addition or Subtraction? Subtraction
14-5=9

### What's a Constant?

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

### Value

MATHEMATICAL VALUE:

In mathematics, value is the 'output' of a function. Basically that of unary, single-valued, there is one input )and one output.

### Numerical Coefficient

NUMERICAL COEFFICIENT:
A numerical coefficient is a factor that multiplies in some term of an it is usually a number, but it
does not involve any variables of the expression
• Meanings for constant,
• a number that arises naturally in mathematics, such as Ï€ or e,
• a value that does not change

### Math Definitions Again

Variable: A letter that represents an unknown matter.
eg. x,a,n or f
Expression: Any single number or variable or combination of operation (-,+,x,÷) involving numbers and variables.
eg. 5,n,8t,x+1,2y-7
Value: A known or calculated amount.
Constant: A number that does not change and it increases or decreases the value of an expression.
Numerical coefficient: A number that multiplies the variable.
eg. 2t

Go to this website for variable help and games. Or click here for numerical coefficient help.

### 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

### Mr. Wilson's math answer question

It's based on the grading range.
for example, the letter grades would fall into these grade ranges:
A: 100% to 90%
B: 89% to 80%
C: 79% to 70%
D: 69% to 60%
F: 59% and lower.
Therefore, since the student got 11 out of 14 correct, their grade would be 78.5%. Which is a C grade.

### Patterns

How to put patterns into charts.

### Definition

Numerical Coefficient- a number that multiplies the variable.

eg.) 2t

### Deinitions

Variable- a letter that represents an unknown number.
eg.) x, a, n, tx2= ...

expression- any single number or variable, or combination of operations involving numbers and variables.
eg.) 5, n, 8+, x+, 2y-7

Value- a known or calculated amount.

Constant- a number that doesn't change and it increases or decreases the value of an expression.

(7+3)÷5(9-8)

10÷5(9-8)
10÷5 1
2x1

Anwser 2

1=I
4=IV
5=V
9=IX
10=X
40=XL
50=L
90=XC
100=C
400=CD
500=D
900=CM
1000=M

Ones
Thousands
Millions
Billions
Trillions
Quintillions
Sextillions
Septillions
Octillions
Nontillions
Decillions

### Adding Mixed Numbers.

What is a mixed number? A number made up of a whole number and a fraction such as:

Try this:
Step 1) Deal with fractions. Already has common denominator.
Step 2) Deal with whole numbers.
Step 3) Combine whole numbers and fractions.

## Saturday, February 11, 2012

### Constant, Numeral Coefficient

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

Numerical Coefficient- a number that multiples the variable.

eg. 2+ , 2 is the Numerical and + is the Coefficient.

### Variable, Expression, Value

Variable-a letter that represents an unknown number.

eg. x, a, n, b

Expression
- any single number or variable, or combinations of operation (-, +, x, /) involving numbers and variables.

Eg. 5, n, 8+, x+1, 2y-7

Value- a known or calculated amount.

### Common Denominator

Common Denominator- a common multiple of the denominators of a set of fractions.

eg. a common denominator for 1/4 and 1/6 is 12 because a common multiple of 4 and 6 is 12.

To make a common denominator we have to find the LCM- Lowest Common Multiples.

eg. 4 and 6
the LCM is 12
4- 4, 8, 12,
6-6, 12

Once we find a common denominator we make eqiuvalent fraction.

### Multiple

Multiple- the product of any given number and natural number like 1, 2, 3.

eg. some multiples of 3 are 3, 6, 9, 12, 15, 18.

List the first 5 multiples of 2, 3, 4, 5, 8, 12.

2- 2, 4, 6, 8, 10
3-3, 6, 9, 12, 15
4-4, 8, 12, 16, 20
5-5, 10, 15, 20, 25
8-8, 16, 24, 32, 40
12- 12, 24, 36, 48, 60

Multiples is just skip counting.

### Adding Mixed Numbers

A mixed number is a number amade up of a whole number and a fraction, such as
Deal with the fraction, already has a common denominator.
Deal with the whole numbers 1.
Combine whole numbers and fractions.
The answer is ---->

### A Question we got in Math class and its Answer

Question. 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?

How I got it. well since I don't know how many students are in the group its unknown so I put S for students the - 2

### What is a Value?

A Value is any known or calculated amount.

### What's a Constant?

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

### What Is An Expression ?

An Expression- is any single number or variable combination of operation ( -, +, x, ./.) involving a number.

### What is a Variable?

A Variable- is a letter that represents an unknown number. eg. x,n,s

### 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

### What is a number coefficent?

A Number Coefficent is a number that multiplies the variables.

### What Is An Expression ?

An Expression is any single number or variable combination of operation ( -, +, x, ./.) involving a number.

### What Is A Variable ?

A Variable is a letter that represents an unknown number.

for example : x, a, n.

### What Is A Number Coefficent ?

A Number Coefficent is a number that multiplies the variables.

### What Is A Constant ?

A Constant is when a number does not change and it increases/decreases the value of an expression.
Q. 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.

A. S- 2

### What is a Numeral coefficient?

A number that multiples the variable.

### What is a Constant?

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

### What is a expression?

Any single number or variable combination of operation ( -, +, x, ÷ ) involving number.

### Whats is a Variable

A letter that represents an unknown number.
e.g. x, a, n

### What is a Value ?

A value is a known or calculated amount.

### What's a Numeral coefficient?

A number that multiples the variable.

### What's a Constant?

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

### What is a expression?

Any single number or variable combination of operation ( -, +, x, division) involving number.

### What is a Variable?

A letter that represents an unknown number.
e.g. x, a, n

### What is a Value?

A value is a known or calculated amount.
Variable-a letter that rapresents an unkown
Number
eg.x,a,n

## Friday, February 10, 2012

### What is a Numerical Coefficient?

A Numerical Coefficient is when a number multiplies the variable.

~For example: 2t
-2 is the numerical coefficient, t is the variable.

### What is a Constant?

A Constant is when the number doesn't change, and it increases/decreases the value of the expression.

### What is a Value?

The Value is any known or calculated amount.

### What is an Expression?

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

~For example: 5, n, 8t, x+1, 2y-7, etc.

### What is a Variable?

A Variable is a letter that represents an unknown number.

For example: x, a, n, etc.

### BEDMAS Questions

BEDMAS
8 + 6 x 2 x 3 - ( 15 - 13 )
what to do first?
Brackets (15-13)=2
Then you write the question again BUT with the answer you got from answering what was in the brackets
8+6x2x3-2
After brackets you look at Exponents, since there is no exponents you go to the next one which is Division and Multiplication. You ask yourself, is there any division or multiplication in this question? The answer is YES! You answer the multiplaction question....2x3=6 then write the question again but with the answer you got for answering the multiplaction question
8+6x6-2
Since there is still a multiplaction question you must multiply it! 6x6=36
Finally Addition and Subtraction. You ask yourself, is there any addition or subtraction question? The anwser is YES! 8+36=44
44-2=42
The final answer is 42!
8+6x2x3-(15-13)
8+6x2x3-2
8+6x6-2
8+36-2
44-2
42

### February 9 2012: BEDMAS question

8 squared divided by 16- 2 squared
64 divided by 16 - 2 squared
64 divided by 16 - 4
4-4
= 0

### Mr. Wilson's math answer question

You don't really know what each questions are worth. So maybe 2 questions are worth 2 and the 3rd questions is only worth one. Altogether its 5. 5-14= 9. 11 divided by 14= 0.7857 x 100= 78.6 (round to the nearest tenth) 78.6-9= 69.6. 69.6 is a C

### An expression word problem

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

Answer: s- 2 =
You don't know how much are in the group so we use variables which represent an unknown number.
s= students
2= how much students left the group

### What is a Numerical Coefficient

NUMERICAL COEFFICIENT- a number that multiplies the variable

Eg. 2t
2= numerical coefficient t= variable

### What is a Value and Constant

VALUE- a known or calculated amount
CONSTANT- a number that does not change and it increases or decreases the value of an expression.

### What is an Expression

EXPRESSION- any single number or variable or combination of operations
(+,-,x,divided by) involving numbers and variables.
EG. 5, n, 8+, x+1, 2y-7

### What is a Variable

VARIABLE- a letter that represents an unknown number
eg. x, a, n

### Numerical Coefficient

A number that multiplies the variable
Eg. 2t

### Constant

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

### Value

A known or calculated amount

### Expression

Any single number or variable,or combination of operations (-,+,x,÷) involving numbers and variables
Eg. 5,n,8t,x+1,2y,-7

### Variable

A letter that represents an unknown number
Eg. x,a,n

## Thursday, February 9, 2012

### 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

### 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

### Constant

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

### Constant

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

### Numberical Coefficient

Numberical Coeficcient is a number that multiples the varible.

E.g.

### Varible

Varible is a letter that represents an unknown number

E.g. S, T, N
S+2=G

### Value

Value - a known or calculated amount
Eg. 2 + 2 = 4
It's a know amount

### Expression

Expression - any single number, variable, or combination of operations (-,+,x,/) involving numbers and variables (I appologize for not putting a dividing symbol.)

Eg. 5, n, 8t, x + 1, 2y - 7

### Variable

Variable - a letter that represents an unknown number
Eg. x, a, n

It could be used in algebraic equations.
Eg. t + 1 = s
t = term or a variable
s = sticks or a variable also

### Adding Mixed Numbers

A mixed number is a number made up of a whole number and a fraction such as..
1 2/3
not 2 3/2

Deal with the whole numbers first

eg. 1 1/3 + 1 1/3

This question already has a common denominator

Deal with whole numbers

1+1=2

Now deal with the fractions

In this case its 1/3 + 1/3

They both have a common denominator

1/3 + 1/3 = 2/3

Combine the whole numbers and fractions

2 + 2/3 = 2 2/3

### Numerical Coefficient

A numerical coefficient is a number that multiplies the variable.

### Constant

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

### Value

A value is a known or calculated amount.

### Expression

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

Examples: 5xA, T+1, 6÷D

### Variable

A variable is a letter that represents an unknown number.

example) x, a ,n

### Value and Constant

Value- a known or calculated amount.

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

### Variable

Variable- a letter that represents an unknown number.

eg.
t, x, n, a

### Expression

Expression- any single number or variable, or combination of operations
(-,+, ÷,x) involving numbers and variable.

eg.
5, n, 8t, x + 1, 2y - 7

### Numerical Coefficient

Numerical Coefficient- a number that multiples the variable.

eg. 2t

2 <--- Numerical
t <--- Variable

### February 9, 2012: BEDMAS Question.

Question:
Is there any brackets? No.

Is there any exponents? Yes, go from left to right.

Exponent: 8x8=64.
Then you rewrite the rest.

Now you do the other exponent.

Exponent: 2x2=4

After that, you do the division.

That equals:

### Pattern#2

Describe the pattern in your own words.
Use the last term of each question to help you with the next one. example.
for term 2. use term 1 then add 2! for term 3, use term 2 then add 2. Keep repeating the "pattern".

Chart

Prediction
I predict the 29th term would have 57 sticks

Graph

Algebraic Equation = Tx2-1
"nth" value.
47th value will have 93 sticks.

### Reminder!

Everyone, please remember to finish chapter & in our homework booklets. Mr. Isfeld will be collecting them Tomorrow!

Also, on Monday, he will be collecting our Number of The Day booklets. So get them up to date.

And don't forget to have at least 10 posts and 10 comments by Monday!

Good luck!

### Math Question

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.