Basic Algebra with Decimals
What is 0.25 + 0.25?
0.5 (or one half)
What is the definition of a "regular" polygon?
All sides AND all angles must be the same!
Fill in the blank: ___ x 24 = 144
6
A fence has the side lengths of 5 feet, 10 feet, 5 feet, and 20 feet. What is the perimeter?
40 feet (5 + 10 + 5 + 20)
If I can run 1 mile in 10 minutes, how many miles can I run in 30 minutes?
What is 0.75 - 0.3?
0.45
Does a regular triangle tessellate?
Yes! Since the angle is 60 degrees, 60 goes evenly into 360.
Fill in the blank: ___ x 13 = 26
2
A picture frame is 5 by 7 inches. What is the area of the frame?
35 in2 (5 x 7 = 35)
If my car travels at 30 miles per hour, how far can I travel in 4 hours?
120 miles
What is 0.5 x 5?
2.5 (or 2.50)
How many triangles could you make in an 11-sided shape?
9 --> (n-2) ---> (11-2=9)
What are all of the factors of 12?
1, 2, 3, 4, 6, 12
A picture frame has an area of 65 in2, and one side of the frame is 13 inches long. How long does the other side of the frame have to be?
5 inches
(5 x 13 = 65)
If I walk at 15 feet per second, how far can I walk in 10 seconds?
150 feet
What is 0.6 ÷ 2?
0.3
How many degrees do all exterior angles of a polygon add up to?
All EXTERIOR angles will ALWAYS add to 360 degrees.
Fill in the blank: ____ x 18 = 54
3
The sides of a house are labeled as:
20 feet, 30 feet, 10 feet, and 1 yard
What is the total perimeter in FEET?
20 + 30 + 10 + 3
63 feet total
I walk at 10 feet per second. If I walked 140 feet, how long was I walking for?
14 seconds.
What is 5 ÷ 0.1?
50 (division of a decimal moves the ten's place!)
Define a COMPLIMENT and a SUPPLEMENT
Compliments add to 90 degrees
Supplements add to 180 degrees
Fill in the blank: ____ ÷ 15 = 9
135
(15 x 9 = 135)
A cabinet door is 2.5 feet wide, and 7 feet tall. What is the total area of the cabinet door?
17.5 ft2
If I can run 10 yards every 2 seconds, how long will it take me to complete a 200 yard sprint?
10 yards every 2 seconds = 5 yards every second
200 / 5 = 40
40 seconds