Download - Tuesday, October 11 th
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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
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Corny Joke of the Day
What did one mountain say to the other after the
earthquake?
“It isn’t my fault”
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Schedule for the Week
Today: Review Data Test Answers, Prime vs. Composite and divisibilityWednesday: Prime FactorizationThursday: Prime FactorizationFriday: Review and Quiz. WEEKLY
REVIEW DUE
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Data test answers
Great job everyone!
Congrats to our Test Toppers
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Clean out Binders
I NEED YOU TO PLEASE LISTEN
CAREFULLY
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Keep in your Binders Warm UpsGoal Sheet SyllabusWeekly ReviewsTabs Unused paper
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Throw away or take home
EVERYTHING ELSE
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Syllabus for Qtr. 2
Please take home and get it signed by your parents
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Unit #1Number Sense
Divisibility, Prime Factorization, GCF, and LCM
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1,407 or 2,303
Are the numbers PRIME or COMPOSITE
and why
Question of the Day
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Task #1 Prime vs. Composite
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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!
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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.
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What about 1 and 2??
1 is it prime or composite?
2 is it prime or composite?
NOTHING
Prime
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Prime
A Prime number is a number that has exactly 2
factors-1 and itself
*2 is prime
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Composite
A Composite Number is a number that has more than 2 factors.
The number 1 is neither prime nor composite
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1,407 or 2,303
Are the numbers PRIME or COMPOSITE
and why
Question of the Day
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You need to use…..
DIVISIBILITY
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Vocab word #1 DIVISIBILITY
a number is divisible by
another if you can divide it and the quotient is a whole number
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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
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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!
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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!
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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
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1,407 or 2,303
Are the numbers PRIME or COMPOSITE
and why
Question of the Day
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Can you answer this now?
1,407 or 2,303
Which one is prime? How do you know?