Ch.3
We use these three words when subtracting integers.
Keep Change Change (KCC)
We use these three words when dividing fractions.
Keep Change Flip (KCF)
When writing rates money always goes here.
Numerator.
When writing rates, time (days, minutes, weeks, etc.) always goes here.
Denominator
The distance a number is from 0.
Absolute Value
What is the value of |-9|?
9
Convert .25 to a fraction
1/4
What is the unit rate if there are 138 miles driven on 6 gallons of gas?
23 miles per gallon
You must have this to add or subtract fractions.
Common Denominators.
Numbers on the right side of zero on the number line.
Positive Numbers
What is the value of 3 - 14?
-11
Convert 3/5 to a decimal.
.6
Which has a lower cost between a 3 oz. can for $0.99, and an 8 0z, can for $2.59?
3 oz. can for $0.99
What is slope?
The change in Y over the change in X
(rise/run)
Numbers on the left side of zero on the number line.
Negative Numbers
What is the value of (-7)(-6)?
42
Subtract (3/5) - (1/5)
2/5
To be proportional, a graph must do two things...
1) Go through the origin, & 2) be a straight line
Which fraction has the greater value: (-7/12) or (-5/9)
(-7/12)
The center of the coordinate plane.
The Origin (0,0)
What is the value of (-12)/6?
-2
Add (1/6) + (-7/9)
(-11/18)
The cost of pizza to the number ordered is proportional. If 3 pizzas cost $21.75, how mush would 5 pizzas cost?
$36.25 for 5 pizzas
A dolphin can swim up to 40 miles per hour. What is this speed in feet per hour? (5280 feet in 1 mile)
211,200 feet per hour
When ratios are equal, or simplify to the same value.
Proportional