Basics
what is an integer?
any whole number, it can be positive or negative or 0
- 6 + 5 =
- 6 + 5 = -1
(–10) – (–10) =
(–10) – (–10) = 0
In an online practice test, Sam scores 18 points for the questions he answered right on the test and gets -3 points for the incorrect answers,
What was sam's overall score?
15 points!
What are numbers that are not integers ?
Fractions, Decimals, percentages
-4 + 11 =
-4 + 11 = 7
(–16) – 10 =
(–16) – 10 = -26
Sara burnt 300 calories working out playing volleyball but ate a deluxe pizza that had a calorie count of 400.
Did Sara burn or gain calories and how many?
100 calories gain
When do we use integers in real life?
give 2 examples
temperature, calories, counting money (debt), seal levels etc.
(-2) + (-20)=
(-2) + (-20)= -22
(–20) – 9=
(–20) – 9= -29
Blake gets into the elevator on the second floor of a shopping mall he goes up 9 floors to the nike store then he goes down 3 floors for food.
What floor is blake now on?
now he is on the 8th floor
is 0 a negative or positive?
neither, it is its own number
8 + (-3) =
8 + (-3) = 5
(–8) – (–14) =
(–8) – (–14) = 6
The temperature of a place was 6 degrees in the morning, at noon the temperature rose by 13 degrees and dropped 4 degrees at night, what is the temperature at the end of the day?
15 degrees!
WHat does it mean when you have negative numbers in your bank account?
either you are in debt
you owe money
you spent money
7 + (-10) + (-4) =
7 + (-10) + (-4) = -7
(–9) – 16 =
(–9) – 16 = -25
A mercury thermometer records a temperature of 10 degrees at 9:00 am if the temperature drops 3 degrees every hour what will the temperature be at 2:00pm?
- 5 degrees