Wednesday, January 20, 2010

Wednesday, January 20th

Sixth Grade

Lesson 63. Prime Factorizaton. Remember, there are two ways to do this. One is by using the factor tree and the other is division by primes.

For the factor tree, you first write the number down and then think of two numbers that multiply to give you that number. You can draw branches from your main number to the two numbers. (I can't do this while typing!) If either one of them is prime, circle it (I have bolded the prime numbers and put them in red). Then, for the one that isn't prime, draw two more branches and write two numbers that multiply to give you that number. For example:

24

3 x 8

2 x 4

2 x 2

Once you have all prime numbers, write out the prime factorization using all your circled numbers like this: 2 x 2 x 2 x 3

For division by primes, you have to put your number inside the division box and think about what PRIME number goes into it. Divide your number by that. If the answer isn't prime, put it in a division box and divide it by a PRIME number. Do this until you have a prime number left. Remember, you can't divide by numbers that aren't prime.

Seventh Grade

Grammar - Chapter 2 pronouns. Exercise A & B & DWS pgs. 29-31. Follow instructions.

Vocabulary - Unit 10 Sentences are due tomorrow!

Math - Lesson 5-7. Adding and subtracting mixed numbers with signs. Remember to follow the same rules for adding and subtracting fractions. You can scroll back to last week's post with all the examples. The only thing different is if you have to borrow in subtraction. Remember to borrow from the whole number and change the fraction by adding the denominator to the numerator. You do this if the top fraction is smaller than the bottom. So, if you had the following:

5 1/6
-3 5/6

You could not subtract 1 - 5 so you borrow from the whole number 5 and make it a 4. Then, you change 1/6 to 7/6 by adding 6 to 1. Now you have this:

4 7/6
-3 5/6

1 2/6 = 1 1/3

Always check your sign at the end. Whatever number is bigger will be the top fraction. If that was negative, your answer is negative. If it was positive, your answer is positive. For the rest of the problems, follow the exact same rules for any signed numbers. You are doing the front page only. #2-20 ALL.

Eighth Grade

The class took a test over Chapter 5 today. We will begin chapter 6 and graphing tomorrow! Yay! I love graphing.

See you tomorrow!

Mrs. Swickey