Vocabulary
Absolute Value
The distance of a number from zero
-8 + (-6)
-14
2 - 9
2 + (-9) = -7
A diver’s elevation is -30 feet relative to sea level. She dives down 12 feet. What is her elevation after the dive?
-30 -12 = -42 feet
Which expression has the same value as -5 + (-3)?
A. -5 + 3
B. 5 - 3
C. -5 - (-3)
D. -3 + (-5)
D
Integer
Positive and negative whole numbers and 0
-250 + (-45)
-295
-3 - (-4)
-3 + (4)= 1
The temperature in the morning was -3°F. The temperature dropped 11 degrees by night. What was the temperature at night?
-3 - 11 = -14 °F
8.75 written as a percent
875%
What are additive inverses
Numbers that are opposite and have a sum of zero
15 + (-8)
7
11 - (-12)
11 + （12） = 23
At the end of one day, the value of a share of a certain stock was $12. Over the next three days, the change in the value of the share was -$1, then, -$1, and then $3.
12 + (-1) + (-1) + 3 = $13
The value of the stock at the end of three days was $13.
GCF of 72 and 102
6
What does this mean? |-6| = 6
The absolute value of -6 is 6, or -6 is 6 units from zero.
85 + （-25）
60
-67 - (-67）
-67 + （67） = 0
In a game, Jack earned 15 points in the first round, in the 2nd round he lost 20 points for not showing sportmanship. In the final round he scored double what he did in the first round. What is his final score?
15 + (-20) + 30 = 25 points
Which of the following expressions has the greatest value?
A. 3 - 7 + (-10)
B. 3 + 7 - (-10)
C. 3 - 7 - (-10)
D. 3 + 7 + (-10)
B
Subtracting a positive number is the same thing as...
add its opposite
-16 + 18 + (-17)
-15
-10 - 11 - (-3)
-10 + (-11) + (3)= -18
Cate and Elena were playing a card game. The stack of cards in the middle had 24 cards in it to begin with. Cate added 8 cards to the stack. Elena then took 12 cards from the stack. Finally, Cate took 9 cards from the stack. How many cards were left in the stack?
24 + 8 - 12 - 9 = 11 cards
Which number can you add to -25 to get a sum of 0?
25; -25 + 25 = 0