711-2011: February 2012

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:

http://www.icoachmath.com/math_dictionary/mathdictionarymain.html

Saturday, February 18, 2012

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

Answer 8.25

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 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.

A letter that represents an unknown number.

e.g. x, a, n

Fractions

Question...

Addition

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=

Question...

Question...

A group of students are playing Rock Paper

Scissors. 2 students leave the group.

answer=s-2

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)

Order of operations

BRACKETS

EXPONENTS

DIVISION

MULTIPLICATION

ADDITION

SUBTRACTION

BEDMAS Answer

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

Addition or Subtraction? -Yes. Addition

215-40

Addition or Subtraction? -Yes. Subtraction

ANSWER IS: 175.

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

addition and subtraction

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

Addition or Subtraction? Addition

8+36=44

44-2

Addition or Subtraction? Subtraction

44-2

Answer:42

BEDMAS Question

2+3x4-5

Brackets? No

Exponents? No

Multiplication or Division? Multiplication

3x4=12

2+12-5

Addition or Subtraction? Addition

2+12=14

Addition or Subtraction? Subtraction

14-5=9

Answer:9

What's a Constant?

A Constant is......

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

Divisibility song

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 expression, 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 π 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

My answer:

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.

MATH QUESTION

Patterns

How to put patterns into charts.

How To Add Fractions That Have A Different Denominator

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.

Making The Question

Going Though a BEDMAS Question

Definitions of..

Mr Isfeld Bedmas Question

(7+3)÷5(9-8)

10÷5(9-8)
10÷5 1
2x1

Anwser 2

Roman Numerals

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

Place Value

Ones
Thousands
Millions
Billions
Trillions
Quadrillions
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.

Hope you learn something about this.

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?

Answer. S- 2

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

My answer:

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