Thursday, September 4, 2014

Thursday, 9-4
Classwork:
-Check and correct HW
-Caomparing Decimals Notes
-Begin Sieve of Eratosthenes

HW:
1st and 3rd periods-Count by 2's, and 5's  on the Sieve of Eratosthenes.
4th period -Also count by 3's and write 3 patterns or observations about the Sieve.
2nd period- Use the back of the Sieve of Eratosthenes to do p. 158 (1-8).  Only tell if the number is divisible by 2, 3, and 5 and why.

The answer to p. 158 number #1 is
1. 2: even, YES
    3: 5+0+8=13,  13 is not divisible by 3, so 508 is not divisible by 3,NO  
    5: doesn't end with 0 or 5 so NO