The Rules
Add or Subtract
Multiply or Divide
Divide
Challenge Problems
100
A negative times a negative is
Positive
100
-3 + (-9)
-12
100
(5)(-7)
-35
100
-32 ÷4
-8
100
The greatest and least temperatures ever recorded in Tim’s hometown are 101 and -36 degrees. Find the difference between these two temperatures.
137 degrees
200
A negative plus a negative is
Negative
200
-13 + (-17) + 7
-23
200
(-7)(-2)(10)
140
200
-100 ÷25
-4
200
On a math quiz the teacher gives 2 points for correct answers and -1 point for incorrect answers. If Emily gets 75 correct and 18 incorrect what is her score?
132 points
300
Before we subtract integers we should always...
Copy Change Opposite
300
45 – (-16)
51
300
(-6)(-7)(2)(5)
420
300
-480 ÷(-12)
40
300
The temperature at midnight is -2 degrees. It goes up 10 degrees. What is the new temperature?
8 degrees
400
A positive divided by a negative is
Negative
400
-5 – (-10) – 6
-1
400
A scientist measures the change in height per second of a giving osprey as -198 feet per second. Find the change in position of the osprey after 2 seconds.
-396 feet
400
An elevator descends 1,500 feet in 60 seconds. Find the change in height per second.
-25 feet per second
400
A submarine is a depth of 45 feet below sea level. It ascends 20 feet and then descends 35 feet. What is its new depth?
-60 or 60 feet below sea level
500
How do we add integers that have different signs?
Subtract and take the sign of the larger number
500
When you wake up on Monday, the temperature is -18 degrees. During the day, the temperature rises by 13 degrees. By the time you wake up on Tuesday, it has dropped 19 degrees. What is the temperature when you wake up on Tuesday?
-24 degrees
500
A scuba diver took 6 minutes to rise to the surface at a rate of 30 feet per minute. How far was he below sea level?
-180 or 180 feet below sea level
500
A hiker descends 320 feet in 40 minutes. Find the hiker’s change in elevation per minute.
-8 feet per minute
500
Ms. Catalano owes her parents 350 dollars for car repairs they paid for last year. She has made 12 payments of 15 dollars each. How much money does she still owe her parents?
-170 dollars or She owes 170 dollars