Add Integers
7 + (-9)
-2
-2 - 4
-6
Write an integer representing this situation.
Adding 4 anchors
Write an algebraic expression to represent the situation.
The temperature was 18 degrees Fahrenheit, then dropped 4 degrees. What was the final temperature?
18 - 4 or 18 + (-4)
14
A swimmer was 3 meters underwater. He swam 5 meters deeper. What is his location now?
-3 - 5
He is at -8 meters deep. He is 8 meters underwater.
7
-2 - (-5)
3
Write an expression representing this situation. Then solve.
The submarine started at 0, then 2 floats were removed.
0 - 2 or 0 + (-2)
Write an algebraic expression to represent the situation.
The temperature was -5 and then it dropped 2 degrees. What was the final temperature?
-5 - 2 or -5+ (-2)
-7
Write an expression. Then solve.
Mr. Boffa went for a climb. He started at 25 feet below sea level and then climbed 14 feet. What is his elevation now?
-25 + 14 or 14 - 25
-11 feeet.
-8 + (-8) + 8
-8
-7 - 4 - (-4)
-7
Write an expression representing this situation. Then solve.
A submarine started at -2, then 4 anchors were removed.
-2 - (-4) or -2 + 4 = 2
Write an addition expression to represent the situation.
The temperature was -5, then it went down another 2 degrees. What was final temperature?
-5 + (-2)
-7
Write an algebraic expression to represent the situation. Then solve.
A swimmer was 2 feet underwater. Then she swam 2 feet deeper. Mary wrote -2 + 2. Rodney wrote -2 + (-2). Who is correct? Explain?
Rodney is correct because swimming deeper in the water means going down, which has to be represented by a negative sign.
-2 + -2 = -4
Indicate which rule you'll use, and then solve.
-17.5 + (-3.8)
-21.3
-16.2 - 2.4
-18.6
Write an expression representing this situation. Then solve.
A submarine started at -5. Then 2 floats and 3 anchors were added.
-5 + 2 + (-3) or -5 + 2 - 3
-6
Write an algebraic expression to represent the situation.
The temperature was -5, then it rose to 8 degrees. What was the change in temperature?
8 - (-5) or -5 - 8 or 5 + 8
There was a change of 13 degrees.
Question 1) ____ + 8 = -7
Question 2) Compare -8.3 and -8.33 using an inequality symbol.
Ans: -15
Ans: -8.3 > -8.33
-15 2/5 + 3 1/3
-12 1/15
-18 3/4 - (-1 2/5)
-17 7/20
Write an expression representing this situation. Then solve.
A submarine started at -2, then 2 float and 3 anchor were removed.
-2 - 2 + 3 or -2 - 2 - (-3)
-1
Write an algebraic expression to represent the situation.
The starting temperature was -2 at 7am. By noon, it rose 5 degrees. Then at night it dropped by 4 degrees. What was the difference in temperature?
-2 + 5 - 4
-1
It was -8 degrees Celsius in Harbin. Later in the day, it was 2 degrees colder. By how much did Harbin's temperature change?
TRICK QUESTION!
It was 2 degrees colder. So the change is 2!