Vocabulary
What is the absolute value of a number?
the distance between a number and zero on a number line
|5|
5
-18 + 12
-6
-4.3 + (-2.57)
-6.87
2.35 - (-1.27)
3.62
What property allows you to move terms around in an expression?
The Commutative Property of Addition
|-18|
18
-16 - (-3)
-13
-5 3/4 + 4 5/6
-11/12
-2 2/3 - 3 7/9
-6 4/9
What property states that the sum of a number and its opposite is always zero?
The Additive Inverse Property
-14.3
17 - (-28)
45
-6 4/5 + 8/3
-4 2/15
Find the distance between -3.4 and 2.8
6.2 units
What is a rational number?
Any number that can be written as a fraction
True or False: Absolute value is always positive
False, zero is the exception because it is neither positive or negative
5 + (-4) + (-2) + 4
3
(hint: look for the additive inverses)
Your bank account balance is $-20.85. You deposit $15.50. What is your new balance?
-$5.35
What is the midpoint between -16 and 4
-6
Is 0 an integer, rational number, or both?
Both
The elevation of an airplane is 1962 feet above the ground. The elevation of a submarine is -1916 feet below sea level. Which is closer to sea level?
The submarine is closer to sea level because its absolute value is closer to 0.
Write an expression equivalent to -8 - (-7)
-8 + 7
7 - 8
7 + (-8)
Evaluate the expression when a=-2.1, b=8.5, c=-3.2
-a+b+c
7.4
Evaluate the expression when a=4, b=-3, and c=2
a - b - c
5