1. Warm up: Pre- Algebra Monday
Identify the temperature that is halfway
between each pair of temperatures.
1.) 0 and 10
2.) -5 and 15
3.) 5 and – 15
4.) -8 and 8
5.) -10 and 7

2. Pre-Algebra
• Please have problem 1.3 on
your desk and get started
on your warm up.
• Discuss problem 1.3
• Please have your spiral
notebooks on your desk.
– 1.4 In the Chips: Using a
Chip Model
• Get started on tonight’s
homework
– ACE worksheet # 23 - 45

3. Focus Question: How can
you use a chip model to
represent addition and
subtraction?

9. Warm up: Pre-Algebra Tuesday
• Complete the chart
Start With Rule End With Number
Sentence
3 Black Add 5 Red ? ?
1 Red and 2
Black
Subtract 3
Red
? ?
? Subtract 3
Black
4 Red ?

10. Welcome to Pre-Algebra
1. Please write your
homework in your agenda
and get started on your
warm up.
2. Finish discussing Problem
1.4
3. Review for Quiz
– Math Fever
4. Work on tonight’s
assignment
– ACE worksheet # 46 - 55
•Investigation 1 Quiz
tomorrow

12. Welcome to Pre-Algebra 1. Please have your homework
on your desk and quietly
review for Quiz.
2. Correct last night’s homework
with a red pen.
– ACE worksheet # 46 - 55
3. Quiz Investigation 1
– Turn in at the front of class and
pick up tonight’s homework
4. Work on Tonight’s Assignment
– Mathematical Reflection
• Complete in your journal
Wednesday
•Grades updates
•Quiz today

13. Warm up: Pre-Algebra THURSDAY
1. Order the numbers from least to greatest
a) .
b) 20.33, 2.505, 23.30, 23
2. Find all of the values of x
a) x + 3 < 1
b) x – 5 is greater than 0
3. Find the missing temperature
a) On Monday, the high temperature was 20
degrees C. The low temperature was -15
degrees C. What temperature is halfway
between the high and the low?
25
9
,
9
5
,
10
3
,
5
2

14. Welcome to Pre-Algebra
1. Please have your
homework on your desk
and get started on your
warm up.
– Mathematical Reflection
2. Return and go over Quiz
– Investigation 1
3. Please get out your spiral
notebooks
– Investigation 2 Vocabulary
Thursday

15. Investigation 2 Vocabulary
• Absolute value
– The absolute value of a number is the distance from 0 on a number
line. It can be thought of as the value of a number when its sign is
ignored.
• Additive identity
– Zero is the additive identity for rational numbers. Adding zero to any
rational number results in a sum identical to the original rational
number.
• Additive inverse
– Two numbers, a and b, that satisfy the equation a + b = 0.
• Algorithm
– A set of rules for performing a procedure. Mathematicians invent
algorithms that are useful in many kinds of situations.
• Commutative property
– The order of addition or multiplication of two numbers does not
change the result.

16. Warm up: Pre-Algebra FRIDAY
1. Find each sum without using a calculator
a) 12 + 4
b) -4.5 + 3.8
c) -250 + -750
d) -12 + 4
e) .







6
1
3
2

17. Welcome to Pre-Algebra
1. Please have your spiral
notebook on your desk and get
started on your warm up.
2. Please get out your spiral
notebooks
– 2.1 Extending Addition to
rational numbers
3. Work on tonight’s assignment
– Problem 2.1 D-G
Friday
•Grades updates