Today we continued our discussion of SHRINKING or DECREASING patterns. We practiced writing patterns in tables and predicted higher terms WITHOUT extending the table. Let's look at this pattern:
124, 121, 118, 115....
Step 1: Find the pattern rule.
To find the pattern rule, find the DIFFERENCE between numbers beside each other. Don't just find the difference between the first two. Find the difference between three sets of numbers just to make sure your rule is correct.
In this case 124 -121 = 3, 121 -118 = 3, 118 - 115 = 3
Chances are our pattern rule is:
Start at 124, subtract 3 each time.
Step 2: Write the pattern in a table of terms
Term
|
Number
|
1
|
124
|
2
|
121
|
3
|
118
|
4
|
115
|
5
|
112
|
6
|
109
|
7
|
106
|
8
|
103
|
9
|
100
|
10
|
97
|
We actually didn't need to extend the table to the 10th term to find the value of the tenth term. We know that there are 9 terms between 1 and 10 (10 - 1 = 9). Each time we go to the next term we subtract 3 so the total amount we subtract from the first number is 9 x 3 = 27. To get the term number we subtract 27 from 124 (124 - 27 = 97).
What about the 30th term? From 1 to 30 is 29 terms. 29 terms x 3 (what we subtract each time) = 87. So the 30th term is 124 - 87 = 37 so the 30th term is 37.
Homework Question: (Please complete in your new math notebook) You can use a calculator!
Write the first ten terms of this pattern in a t-chart.
Write the pattern rule.
What is the 55th term (number) in this pattern?
Write the title (Shrinking Patterns) and the date (October 15) on the top line. Underline it with a red pen.
Social Studies
Today we talked about voting and the procedure we follow when we vote. Our voting system for the federal elections is called FIRST PAST THE POST. Simply put, the person with the most votes wins the riding and represents the people in the riding as their Member of Parliament. The leader of the party with the most Members of Parliament becomes the Prime Minister.
What's wrong with first past the post?
The first video explains First Past the Post. It's about Ontario, but it works the same for the federal election.
The second video explains ranked choice voting:
Tomorrow we will see if the same person wins our class election using First Past the Post and ranked choice voting.
Make sure you complete your Social Studies sheet. Think about it. Talk to a parent. Here is a summary of the candidates and their parties in the riding of LONDON WEST.
An INCUMBENT is the Member of Parliament who currently holds the seat in the riding.
We have a Libertarian candidate. I didn't know that! The Libertarian Party is somewhat similar to the People's Party of Canada.
On Friday we will be holding our Student Vote Election for Grades 4 to 8. The results for our election will be counted with hundreds of thousands of other students across Canada. Do you think the student vote will be the same as the actual election vote? Stay tuned.....
STUDENT VOTE DAY
National Student Vote Week will take place from October 15 to 18, across all provinces and territories. More than 1 million students are expected to cast ballots for the local candidates running in their school’s riding.
Here are the results from the last federal election in 2015:
Reminders:
- We will be having short quizzes in Patterning over the next week (not tomorrow).
- Please make sure you have proper Phys. Ed clothing at school. You cannot wear a collared shirt. Plain white, navy or St. Nicholas athletic wear shirts (navy or green) are appropriate.
- Bring a simple calculator to school if you have one. One from the Dollar Store is fine.
- Chess begins tomorrow. You're going to love it!
