We completed the large wall Venn Diagram in class today. A big thanks to my Green class that put ALL of the numbers in the Venn Diagram...
OR THE BOX OF SHAME!
We also began to learn about Prime numbers...
We used the Sieve of Eratosthenes to identify the primes from 1400. Try it yourself on this page.
Want some practice learning about Prime and Composite numbers? Check out this tutorial from Math is fun.
No actual homework this weekend, but we will have a quiz on September 23rd. I handed out a study guide in class, but it seems like a few people left it behind... Read below to see what you might have forgotten to bring home!
You are
responsible for the following information for this quiz:
1) Divisibility
Rules  you will be given a number and must be able to determine
whether it is divisible by 2, 3, 5, or 10 using a Venn Diagram.
For example: 56,340
(You would place the number in
the correct space on the Venn Diagram)
***You must have the
divisibility rules memorized***
2) Prime
and Composite Numbers  you must know the definitions of prime and
composite numbers
Prime
Numbers  the only factors of a prime number are 1 and itself
Composite
Numbers  Composite numbers have other
factors besides 1 and itself
You
must also be able to sort a list of numbers in two groups: prime & composite
3) Probability
& Ratio
You
must know how to write a ratio in lowest terms and find the probability of an
event as a fraction in lowest terms.
For
example ~ Probability: A junk box
contains 5 markers, 6 pompoms, and 3 beads.
What is the probability of picking a marker from the box without
looking? Answer: 5 out of 14
Ratio: What is the ratio of pompoms to
markers? Answer: 6:5 or 6 to 5 or 6
5
4) Percent
You
must be able to identify the percent when given a fraction or ratio.

20
100
See you all on Monday! Have a great weekend!
Miss K :)




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