Fri Sept 30 - Prime factoring

We did the following questions on the overhead:

1.  Find a 4 digit number that is divisible by 2 and 5.
2.  Find a 5 digit number that is divisible by 3 and 9 but not 2.
3.  Find a 6 digit number that is divisible by 3 and 8.

Homework: 1.1 Primes and Composites  1.2. Prime factoring

Thurs Sept 29th - Colouring the 1-200

Today we looked at multiples of Prime Numbers.

We coloured - All multiples of 2,3,5,7,11,13,17,19, 23, 29.

Homework: "1.1 Identifying Prime and Composite Numbers".

We watched the following YouTube videos
Jenna's Bonus - A clear explanation of the divisibility rules can be found at:
http://www.youtube.com/watch?v=wCSRj8pTCoM

Funk-e's Bonus - A dancing hot pepper sings a reminder about only using the digital sum for 3s and 9s:
http://www.youtube.com/watch?v=1ffvCtNZN9Q

New Easy Bonus: Find the best YouTube video about Prime Numbers!

P.S. Shana Tova (Happy New Year) to those celebrating today!

P.P.S.  Ms Gesner forgot to collect 2.2 and 2.5 - Make sure you have it finished for tomorrow!!

Wed Sept 28, 2011 - Square Roots & Divisibility Con't

Today we discussed the divisibility rules for 8, 3, 9, 6 and 7
8 - A number is divisible by 8 if its last 3 digits are divisible by 8
3 - A number is divisible by 4 if the sum of its digits is divisible by 3
9 - A number is divisible by 9 if the sum of its digits is divisible by 9
6 - A number is divisible by 6 if it is divisible by 2 and 3 (even and digital sum a multiple of 3)
7 - Will you be the mathematician who discovers a rule for 7?

Homework:  Finish "2.2 Squares and Square Roots" and "2.5 Factors and Divisibility"


Easy BONUS: Find the best youTube video that explains the divisibility rules.
Difficult BONUS: Research and briefly explain *why* the rules for 3 and 9 work. 

Tues Sept 27, 2011

Ms. Gesner was at We Day.

Students had a quiet work period:
Homework:
2.2 Squares and Square Roots
2.5 Factors and divisibility.# 1-14 and #17-21

Mon Sept 26 - Exponents & Divisibility

Today we corrected "1.6 Square Roots"

We learned that:
Squared means to the exponent 2
Cubed means to the exponent 3

We learned that numbers are divisible:
By 2 - If they are even
By 5  - If they end in 5 or 0
By 4 - If the last two digits of the number are divisible by 4  
For examples one million, one hundred twenty-four thousand and twenty-four (1,124,024) *is* divisible by four because the last two digits (24) is divisible by 4.


HW - 1)  Finish "1.4 Calculating Powers"
2)  Use the internet to find the divisibility rule for 3 and for 9. On the same piece of paper as the notes you took in class write a sentence to explain the rule and give an example.

Easy BONUS: Find the best youTube video that explains the divisibility rules.
Difficult BONUS: Research and briefly explain *why* the rules for 3 and 9 work. 

Thurs Sept 22nd - Square Roots

Today we learned how to estimate square roots.

4 squared = 16
5 squared = 25

So, the square root of 20 must be about halfway between 4 and 5.
Short explanation at:
http://www.teachertube.com/viewVideo.php?title=Estimating_Square_Roots&video_id=6049
Longer explanation at:
http://www.youtube.com/watch?v=o26ohFZwxbQ

HW (Homework): 1.6 Square Roots 


P.S. If your calculator doesn't have a square root button go to:
http://www.metacalc.com/

Wed Sept 21st

Today we corrected the integers, reviewed long division using decimals and finished Quiz #1.

HW - 1) Have at least 5 long division problems finished. 2) Circle all of the Perfect Squares (1, 4, 9, 16, 25, 36...) in the the 1-200 Chart.

Tues Sept 13th 2011

Quiz Today.

Homework for tomorrow - Finish adding all three columns of integers.

Friday Sept 16th, 2011

Quiz Tuesday -
1) Adding, Subtracting, Multiplying whole numbers and decimals.
2) Multiplying and dividing by powers of ten ( ex divide by 0.01, multiply by 1000)
Bonus - Dividing decimals

Thurs Sept 15th

Today Team 2 (the team by the window) won our game of Mental Math.

HW - Circled questions on Multiplying and Dividing by Powers of Ten sheet.

Wed Sept 14th

Today we corrected Mental Math and finished the Locker Problem.
No homework tonight! (this will be rare, so enjoy it!)

HW - Both sides of Mental Math / Multiplying by 10, 100, 100 sheet.

Monday Sept 12, 2011

HW - #7 a,b,c #8 a,b,c, #9 a,b,c

Fri Sept 9 - Thank Goodness it's Friday!

Thank Goodness it's Friday!

Today we did a multiplication review and continued with the locker problem.

Homework:  Bring a geometry set and a calculator (These don't need to be new)

Have a great weekend!

Thursday Sept 8, 2011 - WELCOME.

Welcome to Ms. Gesnerville!
This website is used for Class 8-8 Math.

Today, Sept 8th, we began a review of basic calculations (addition, subtraction and multiplication).

We discussed problem solving strategies:
1) Make sure you understand the problem
2) Solve the easiest part of a problem first
3) Use real world objects or your imagination of a real-life situation
4) Make a chart.
5) Draw a picture.



As a group we took a look at a problem involving LOCKERS.  In this problem there are 70 lockers in a hallway.

Today we looked at a problem involving lockers. The scenario was:

1) Ben opens all 70 lockers.

2) Maple comes along and closes every second locker.

3) Con arrives and changes the position of every third locker (If the locker is open, he closes it, if closed, he opened it.)

4) Maeghan changes the position of every fourth locker.

5) Dan changes every 5th...

6) Robi-Ann changes the 6th etc. etc. etc.

WHAT PATTERN WILL EMERGE AT THE END??

Homework
Finish every other problem on the front side of the "Yellow Book Pretest" sheet.