Key Words
What should you do when you read the words "how much more" in a word problem?
subtract
Area of a square/rectangle
A = b x h
Simple Interest
I = P x r x t
Jackson went running. He ran 4 mile in 25 minutes. At this rate, how long will it take him to run 10 miles?
miles 4 10
---------- --------- ---------
minutes 25 x
A circle has a diameter of 24. What is the radius?
radius = 12
What does RIWN stand for?
Rational, Integers, Whole, Natural
"Running In White Nikes"
Area of a triangle
A = 1/2 b x h
or
A = b x h divided by 2
Area of a trapezoid
A = 1/2 (b + b) x h
Sam bought a basketball for $14.50 and paid 8% tax. How much money did he pay in tax?
tax x 8%
------- -------- --------
total 14.50 100%
How do you convert a fraction to a decimal?
TIBO
(top # in, bottom # out)
How do you figure out how much change to get back if paying with a $50 bill?
Subtract
Area of a circle
A= 3.14 x r2
Volume of a rectangular prism
V = Bh
The price of a pair of shoes was decreased from $67.00 to $43.00. By what percentage was the price of the pair of shoes reduced?
change 24 x %
--------- -------- --------
original 67 100%
What is the shortcut for dividing by 100?
Show me on your whiteboard.
Add a decimal if there is not one and move it back twice.
What shape do you always have to divide by 2 when finding the area?
Triangle
Circumference
C = 3.14 x d
Volume of a rectangular pyramid
V = 1/3 B x h
Jack bought a pair of shoes for $75 and sold them for $115. What is the percent increase?
change 40 x %
---------- --------- ---------
original 75 100 %
-15 - 8 =
"same signs add"
-23
What do you write when you are asked for probability?
A fraction!
What is asked/ total
Constant of proportionality
K = Y / X
Volume of triangular pyramid
V = (1/3) (1/2) B x h
Ashley found some pants that cost $35.70. She gets a discount of 15% off. What was the amount of the discount?
discount x 15 %
----------- --------- ---------
total 35.70 100 %
-28 + 19
"different signs subtract"
-9