Thursday, September 17, 2009

Thursday

Sixth Grade

Lesson 20. Finding Great Common Factor. To find the GCF, list all the factors of the numbers and then choose the biggest number in BOTH lists. For example, to find the GCF of 16 and 24. You would list the factors of 16 - 1,2,4,8,16 and 24 - 1,2,3,4,6,8,12,24. Notice that both lists have the number 8 in them. That is the biggest number in both lists so it is the GCF.

Seventh Grade

**PROGRESS REPORTS WERE SENT HOME TODAY!! PLEASE GET THEM SIGNED AND BROUGHT BACK TOMORROW!!!!

Spelling - Challenge page. Remember, the entire unit is due tomorrow! Also, be sure you are studying the words for the test.

Math - Worksheet with distributive property and like terms. For combining like terms, remember that you identify which terms are "alike" meaning, they have the exact same variables or they are just constant numbers. Then, combine the coefficients. For example:

2a + 3 - 5a + 8. Here, the 2a and the 5a are "alike". Since 5a has a minus sign in front of it, remember to use that and say to yourself, "2a - 5a", then think "2-5" which is -3. So you have -3a. Now, combine the constant terms: the 3 and the 8. Since 3 and 8 both have plus signs in front, they are both positive. 3+8 = 11. So, now you have -3a + 11. That's it! Remember, you CANNOT combine two terms unless they have the exact same variable. Since the 11 doesn't have it's own "a", you can't add it to the -3a.

For the ones with parentheses in them, you will be using distributive property and combining like terms. For example: 2a(3 -5b) - 8. Here, you have to distribute the "2a" to both things in parenthesis - the 3 and the -5b. First, multiply 2a by 3 = 6a. Then multiply 2a by -5b = -10ab. Now you have: 6a -10ab - 8. Since no terms have the exact same variables, you are done!

Another example would look like this: -3(5y - 8) + 10. Here, you would multiply the -3 by the 5y to get -15y. Then multiply the -3 by the -8 to get +24. (remember, the sign in front of a number goes with it...so you can think of the 8 as negative). Now you have, -15y + 24 +10. You can add the 24 and 10 because they are both constants. The final answer is -15y + 34. You cannot combine these because 34 doesn't have it's own "y".

Complete the worksheet for tomorrow!

Eighth Grade

Lesson 1-14. Order of Operations. #2-25. Remember the order.

Brackets
Parentheses
Exponents
Multiplication or Division
Addition or Subtraction

The key is to remember that you multiply OR divide, whichever is first from left to right. So if you see, 25 divided by (-5)(-3). You would do the 25 divided by (-5) first! That would be -5 which you would then multiply by -3 to get +15. Take your time and make sure you are not blowing off any signs!

Don't forget to return your progress reports tomorrow. If you don't, they are getting mailed to your house!

See you tomorrow!
Mrs. Swickey