Compare
using >,< or =
using >,< or =
Compare using>,< or =
-5 ___ -14
>
Evaluate all 3 problems
a) -7 (4)
b) -2(2)
c) -24 / -4
a) -7 (4)= -28
b) -2(2) = -4
c) -24 / -4 = 6
-8 + 2 + (-10)
-8 + 2 + (-10) = -18 + 2 = -16
or
-8 + 2 + (-10) = -6 + (-10) = -16
Evaluate each expression if a = -3, b = 2, c = -1
a + b + c
a + b + c
-3 + 2 + (-1)
-4 + 2
-2
There are 17 students in your class. The teacher says the total number of students will drop 12 students because of a trip. Which expression represents this situation?
a. 17 + 12 b. 12 + (-17)
c. 17 + (-12) d. 12 - 17
c. 17 + (-12)
Compare using>,< or =
-25 ___ -22
<
-|-20|
-|-20|
- 20
-5 - 3 - (-14)
-5 - 3 - (-14)
K C O
-5 + (-3) - (-14) =
-8 - (-14)
K C O
-8 + 14 = 6
Evaluate each expression if a = -3, b = 2, c = -1
a - b - c
a - b - c
-3 - 2 - (-1)
K C 0
-3 + (-2) + 1
-5 + 1 = -4
At the start of a science experiment, the temperature is 5 degrees Celsius. If the temperature decreases by a constant rate of 2 degrees Celsius each minute, what will be the temperature, in degrees Celsius, after 4 minutes. Use a number line to explain the result.
(Draw number line for class)
After 4 minutes, is now -3 degrees Celsius.
Compare using>,< or =
-5 ___ -1/2
<
|-9 + 7|
|-9 + 7|
|-2|
2
-3(-3)(-5)
-3(-3)(-5) = 9(-5) = -45
Evaluate each expression if a = -3, b = 2, c = -1
ba - |c|
ba - | c |
2(-3) - |-1|
-6 - 1
K C 0
-6 + (-1) = -7
In a board game, players lose 50 points every time they land on a black space. If there is no other way to lose points and Steve has a score of -300 points, what is the minimum number of times he could have landed on a black space? Show your work.
-300/50 = -6
Steve lost (landed on a blank space) a minimum of 6 times.
Compare using>,< or =.......|-12 + 8| __ |6|
<
|-12 + 8| __ |6|
|-4| 6
4 < 6
Solve all 3 problems separately.
a) 6 - (-10)
b) 10 - 22
c) -6 - 12
a) 6 - (-10) = 6 + 10 = 16
b) 10 - 22 = 10 + (-22) = -12
c) -6 - 12 = -6 + (-12) = -18
5a(-bc)
5a(-bc) = 5a(-1bc) = -5abc
Evaluate each expression if a = -3, b = 2, c = -1
5(b + a)
5(b + a)
5(2 + -3)
5(-1)
-5
Which of the following is mathematically impossible to do?
a) 4 / 0 or b) 0 / 4
Explain your reasoning.
You cannot do 4 / 0 since you are dividing by 0.
You cannot take 4 things and divide them into 0 groups.
You cannot get a 4 on a quiz of 0 questions.
It is impossible to divide by 0!!!
On Monday, high temperature in Mr. Casey’s classroom was -7 degrees. On Tuesday, the high temperature rose 9 degrees. Use a number line to find the high temperature in his classroom.
(Draw a number line)
2 degrees Fahrenheit
Expression: -7 + 9 = 2
Mrs. Dimonte had -6 dollars in her bank account after an expensive weekend in Atlantic City! The bank then charged her a 5 dollar overdraft fee. Mrs. Dimonte went to the bank and deposited (added) 20 dollars in her account. Write an expression representing her account activity. Then solve how much money is in her account.
Expression: -6 - 5 + 20
-6 - 5 + 20
K C O
-6 + -5 + 20
-11 + 20
$9 in her bank account
-7 + 7 + 10 - 10 + 17 - 5 -12 + 12
-7 + 7 + 10 - 10 + 17 - 5 -12 + 12 =
17 - 5
12
The following are the high temperatures in the town of Hillsborough, Alaska for one week(in Degrees Fahrenheit). 5, -5, -3, 10, -1, 3, 5 in degrees Fahrenheit What is the mean temperature in Hillsborough for that week?
5, -5, -3, 10, -1, 3, 5
5+10+3+5 + -5 + -3 + -1
23 + -9
14 / 7 total numbers
2 degrees Fahrenheit
Of the following situations, which is best described by 3(-2)?
a. The height of a boy that grew 3 inches for 2 years
b. The change in temperature as it increases 3 degrees for 2 hours.
c. A plane descends 2 feet per hour for 3 hours.
d. A store sells 2 candies and earns 3$ per candy.
c. A plane descends 2 feet per hour for 3 hours.
DESCENDS means "goes down" so its a "negative"
-2 * 3
= 3(-2)