Opposites
-13
13
At 3 p.m., the temperature was 9 degrees F.
By 11 p.m., it dropped 31 degrees F. What was the temperature at 11 p.m.?
-22 degrees
9 – 31 = -22 degrees OR
9 + ( -31 ) = -22 degrees
18 + (___) = 0
-18
5
-5
The temperature in Montreal was -15 degrees C. In New York the temperature was 11 degrees C.
How many degrees warmer was the temperature in NewYork? (What is the difference)?
11 – ( -15 ) = 26 OR
11 + ( 15 ) = 26
New York is 26 degrees warmer.
-74 + (___) = 0
74
1,874
-1,874
Monday’s high temperature was 6 degrees C. The low temperature was -3 degrees C. What was the difference between the high and low temperture?
6 – ( -3 ) = 9 degrees OR
6 + ( 3 ) = 9 degrees
(___) + (-81) = 0
81
-35.92
35.92
Tina wrote a check for $35 on Monday. On Tuesday she made of withdrawal of $60 and on Wednesday she deposited $75.
What is the change in Tina’s account after the three days?
-35 – 60 + 75 or -35 + ( -60 ) + 75 = -$20 OR
-95 + 75 = -$20
Tina has $20 less in her account or she is -$20 in her account.
(-5) + (___) + ( -17) = 0
22
0
0
Jane gained 25 points in the first round of a game. In the second round she lost 40 points and on the third round she gained 10 points.
Write and evaluate an expression to find how many points Jane gained or lost.
25 – 40 + 10 or 15 + ( -40 ) + 10 = -5 OR
25 + 10 + ( -40 ) = -5 OR
35 -40 or 35 + ( -40) = -5 OR
Jane lost 5 points.
(-11) + 9 + (___) = 0
2