Remember for the Exams: Converting Percents, Decimals, and Fractions

Percent: Is always out of 100

Decimals: Is always over 1

Fractions: Is always whole number over whole number.

How to Make a Perpendicular Bisector

Step 1: Open compass to just over half way of the line.
Step 2: Sharp point at point A, make an arc.
Step 3: Sharp point at point B, make an arc.
Step 4: with a ruler, join the intersections of the arc.


And you should end up with something that looks just like this:

Remember for the Exam: Geometry

Remember for the Exam: Measure of Central Tendency

Measure of Central Tendency) A value that represents the centre of a data set.


(A data set is a group of numbers that you must arrange in order from least to greatest.)


Mean) The sum of a set of values divided by the number of values in the set.
Median) The middle number in a set of data after that data set has been arranged in order.
Mode) The most frequently occurring number in a set of data.


Range) The positive difference between the largest and smallest values in data.
Outlier) Value that is larger or smaller than the other data value. 
The data set might have more than one outlier or zero outliers.

Remember for the Exam: BEDMAS

Brackets
Exponents 
Division
Multiplication

Addition
Subtraction

First you check for brackets then exponents. 
Then check for division or multiplication.
Last, check for addition or subtrction.

Remember for the Exam: Divisibility Rules

0) Ends in zero
1) All numbers
2) Even numbers
3) Sum of digits is three
4) Divisible by two twice
5) Ends in zero or five
6) Divisible by two and three
7) None, use a calculator
8) Divisible by two thrice
9) Sum of digits is nine
10) Ends in zero

Remember for the Exam: Integers

Negative numbers represent values below zero and positive numbers represent values above zero.


4+ (-2)= (-1) Is an addition statement.
3- (-1)= 4 Is a subtraction statement.


Opposite integers have the same numeral but different sign. 
Eg. (+3) and (-3)


If you need help understanding how to do this, I would suggest you use integer chips or a number line. It helps me when I get stuck. I hope it helps you too! :) 

Remember for the Exam: Circle Formulas

You need to know the ratio of circumference to diameter of any circle is always the same.


Area is the measure of space a 2D shape covers.

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

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!

Equivalent Fractions

Did you know that equivalent fractions are almost like reduced fractions? They are! If you don't believe me, please look at the diagram below.

See the similarities? Four eighths and one half are equivalent fractions and four eighths also can be reduced to one half for the most proper answer.

If you have trouble reducing fractions, then keep reading this post.

All we have to do is divide. if you don't understand, look at the picture below.

See? If you still don't understand, ask someone who knows to help you. I'd love to help you if you need help or even Mr. Isfeld. But remember, don't just sit there and struggle. If you need help, ask someone who can help.

Thanks for reading my post. And remember to study for the test on Friday, finish all your unfinished pages in your number of the day booklet and homework booklet, and make at least 5 posts on this blog before Christmas break of you'll be missing the movie in the morning and dance in the afternoon on Wednesday.

The Answer For #13 on the Textbook Page #221

The question asks, the sum of two fractions is 1. If the difference(the answer to a subtraction question) between the two fractions is two eighths, what are the two fractions?

What it`s asking is, (fraction A) plus (fraction B) should equal 1, but (fraction A) subtract (fraction B) should equal to two eighths. If you still don`t understand, please look at the diagram.

So what you have to do first is, find all the possibilities that will equal eight eighths. Please look at the following diagram.

Now, you should make all the equations subtraction questions instead of addition. Once you do that, which subtraction equation equals two eighths?

So there is the solution to #13 on page 221.

Divisibility Rules for 8

All Numbers Divisible by 2, Thrice (3 times). 2x2x2=8.

Chapter 4: Review Test

Here is the Answer to Question #5:

A) one-eighth because there are 8 ticks before one so then to make one, you have to have eight eighths.

B) 75% because six eighths is equivalent to three fourths. Three fourths is 75% in percentage.

C) 1.25 because every two ticks is one quarter. 0.25 is worth two ticks. Then for ten ticks, it would be 0.25x5 that equals 1.25.

Order of Math Operations

October 31st Bedmas Question (how to do it):

1st) Check for Brackets

2nd) Check for Exponents

3rd) Check for Multiplication or Division

-there are some so multiply first because you go from left to right.

4th) Check for Addition or Subtraction

-there is, so you should answer it.

5th) Box the answer so you know it's the answer

Here's a Helpful Link if You Still Need Help:

http://ca.ixl.com/promo?partner=google&phrase=Explorer%20Beta%20-%20Flash%20Ad%20CA&gclid=CM6r6Me0vKwCFQIDQAodYGrypg

Please Watch This Video: