tuesday, october 11 th
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Tuesday, October 11 th. Warm Up. Please write down Homework and complete Warm UP. Start with 1 and add 3 to 4 times the numbers. What will the 3 rd number in the sequence be? Simplify 3 + 10 - 24 ÷ 4 +9. Corny Joke of the Day. - PowerPoint PPT PresentationTRANSCRIPT
Tuesday, October 11th
• Please write down Homework and complete Warm UP
1. Start with 1 and add 3 to 4 times the numbers. What will the 3rd number in the sequence be?
2. Simplify 3 + 10 - 24 ÷ 4 +9
Warm Up
Corny Joke of the Day
What did one mountain say to the other after the
earthquake?
“It isn’t my fault”
Schedule for the Week
Today: Review Data Test Answers, Prime vs. Composite and divisibilityWednesday: Prime FactorizationThursday: Prime FactorizationFriday: Review and Quiz. WEEKLY
REVIEW DUE
Data test answers
Great job everyone!
Congrats to our Test Toppers
Clean out Binders
I NEED YOU TO PLEASE LISTEN
CAREFULLY
Keep in your Binders Warm UpsGoal Sheet SyllabusWeekly ReviewsTabs Unused paper
Throw away or take home
EVERYTHING ELSE
Syllabus for Qtr. 2
Please take home and get it signed by your parents
Unit #1Number Sense
Divisibility, Prime Factorization, GCF, and LCM
1,407 or 2,303
Are the numbers PRIME or COMPOSITE
and why
Question of the Day
Task #1 Prime vs. Composite
Snap Cube Discovery
At your tables you will find snap cubes, please be respectful of these
fun math manipulatives! Review: ARRAY=rectangle Each person will complete the table on
the back Let’s do it together!
Discussion#1 For which numbers can you
make only one array? These are our prime For instance, 3 is prime since only one
array can be made #2 For which numbers can you
make more than 1 array? These are our composite For instance, 4 is composite Since more than one array can be
made.
What about 1 and 2??
1 is it prime or composite?
2 is it prime or composite?
NOTHING
Prime
Prime
A Prime number is a number that has exactly 2
factors-1 and itself
*2 is prime
Composite
A Composite Number is a number that has more than 2 factors.
The number 1 is neither prime nor composite
1,407 or 2,303
Are the numbers PRIME or COMPOSITE
and why
Question of the Day
You need to use…..
DIVISIBILITY
Vocab word #1 DIVISIBILITY
a number is divisible by
another if you can divide it and the quotient is a whole number
Rules of DivisibilityDivisibility Rules
A number is divisible by. . . Divisible Not Divisible
2 if the last digit is even (0, 2, 4, 6, or 8). 3,978 4,975
3 if the sum of the digits is divisible by 3. 315 139
4 if the last two digits form a number divisible by 4.
8,512 7,518
5 if the last digit is 0 or 5. 14,975 10,978
6 if the number is divisible by both 2 and 3 48 20
9 if the sum of the digits is divisible by 9. 711 93
10 if the last digit is 0. 15,990 10,536
Tell whether 462 is divisible by 2, 3, 4, and 5
2
3
4
5 Not divisible
So 462 is divisible by 2 and 3.
The last digit, 2, is even.
The sum of the digits is 4 + 6 + 2 = 12. 12 is divisible by 3.
The last two digits form the number 62. 62 is not divisible by 4.
Divisible
Divisible
Not divisible
The last digit is 2.
You try!
Tell whether 540 is divisible by 6, 9, and 10
6
9
10
So 540 is divisible by 6, 9, and 10
The number is divisible by both 2 and 3.
The sum of the digits is 5 + 4 + 0 = 9. 9 is divisible by 9.
The last digit is 0.
Divisible
Divisible
Divisible
You try!
Finding the Missing Digit
1. Create a number that is divisible by 2 AND 5 32,07__
2. Create a number that is divisible by 4 and 6 26,95____
3. Create a number that is divisible by 8 and 9123,98______
Work on this with your groups. When you think you have the answers raise your hand & then help
others around you
1,407 or 2,303
Are the numbers PRIME or COMPOSITE
and why
Question of the Day
Can you answer this now?
1,407 or 2,303
Which one is prime? How do you know?