Pre-Algebra Room 424 Ms. Josie
Please sign in next to your name on the sheet by the door.
I have pencils, pens, paper, if you need it.
I will be available in my room from 12:00 - 12:30 for tutoring on Mondays and Wednesdays if you ever want extra help. (PLEASE LET ME KNOW AHEAD OF TIME)
The day’s lesson and the homework will be posted to my website by the end of each day.
www.mrsmillersmathtutoring.com
Always feel free to email me with any questions or concerns.
jmiller1@camdencc.edu
Warm Up: You have 5 minutes to work on these problems. Then, we will go over them.
What is the Greatest Common Factor of 2020 and 2025?
(Create a Factor Tree for both, P22 & 23)
What is the Greatest Common Factor of 1984 and 1990?
(Create a Factor Tree for both, P22 & 23)
Solve
Workbook page 23
#8-10 HOMEWORK
Tamar is correct.
All other Even Numbers can be divided by 2, so they are not Prime.
EXTRA Practice
Create a Factor Tree for 30, 81, 56, and 72
Is there a Greatest Common Factor for 30, 81, 56, and 72?
HOMEWORK
Properties of Numbers
All actions in algebra are based on certain properties, or rules. These properties give you the freedom to make decisions about the best way to solve problems.
Workbook page 24
Properties are written using variables. You can replace the variable with any kind of number: fractions, decimals, signed numbers, and so on.
The commutative property works only with addition or multiplication.
You can add or multiply numbers in any order, and the result will be the same.
Workbook page 24
The associative property also works with addition or multiplication. It allows you to change how numbers are grouped.
Parenthesis are used to show which operation should be done first. However, when the operations are addition only or multiplication only, you can change how the numbers are grouped.
In the example, notice how these properties make it easier to multiply numbers.
Workbook page 24
Remove the parenthesis
Change the order
Group as you’d like
Multiply
TIP
Look for ways to group compatible numbers – numbers that are easy to work with.
Here, it is easier to multiply 25 by 4 than 25 by 12.
The distributive property involves multiplication and addition.
Study this example to understand how the property works.
Workbook page 24
Workbook page 25
You can also use the distributive property with subtraction.
Workbook page 25
Workbook page 25
Solve as directed.
Workbook page 25
Solve as directed.
Workbook page 25
Solve as directed.
#4-5 HOMEWORK
EXTRA, not in packet
EXTRA, not in packet
EXTRA, not in packet
EXTRA, not in packet
EXTRA, not in packet
EXTRA, not in packet
Tonight’s homework:
Page 25, numbers 4-5