Basics
What is an integer?
Any WHOLE number that is either positive, negative or 0.
What is 5 + 15=
5 + 15= 20
What is 5- 2=
5 -2 = 3
James withdrew $80 from his bank account
what is the correct integer?
$- 80
What is an example of a number that is not an integer?
any decimal or fraction
What is -3 + 5 =
-3 + 5 = 2
What is -6 - (-5) =
-6 - (-5) = -1
In the morning today it was - 2 degrees and then by 2:00pm the temperature was now 5 degrees.
Did the temperature get warmer or colder?
it got warmer
What is an example of when we use integers in real life?
Money, debt, sea levels, temperature, scores in hockey and golf, counting calories, stock market.
What is -4 + -6 =
-4 + -6 = -10
what is -3 - 8=
-3 - 8=. -11
In an online test, sam got 18 points correct on his test but gets 3 of those points incorrect for spelling, how many points did sam score?
15 points
What is an absolute number?
the distance from the number to zero (how many spaces to zero)
or
the number of an integer without the positive or negative sign
ex: the absolute number of -4 and + 4 is 4
What is 25 + (- 10) =
25 + (- 10) = 15
What is -25 - (-4) =
-25 - (-4) = -21
Blake takes the elevator on the 2nd floor and goes up 8 floors to the nike store. Then 30 minutes later he goes down 3 floors to the foodcourt. What floor is Blake currently on?
he is on the 7th floor
When a subtraction sign and a negative sign are beside each other what does it become?
solve:
6 - (-2) =
It becomes addition
6 + 2= 8
What is 4 + (-6) + 3 =
4 + (-6) + 3 = 1
What is -67 - (20) =
-67 - (20) = - 87
A mercury thermometer records a temperature of 10 degrees at 9:00am, if the temperature drops 3 degrees every hour, what would the temperature be at 2:00pm?
- 5 degrees