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Ratios
Integers/PEMDAS
Inequalities
Equations
Stuff we haven't learned. (500 points all questions)
100

A grocery store sells packages of fruit. They have 8 oranges, 5 pears, 3 apples, and 2 grapefruit.


What is the ratio of Pears to Oranges?

5:8

Or 5/8 (Fraction)


Or 5 to 8

100

A dolphin dives 20 feet below sea level. A submarine is 50 feet below sea level. 


What does sea level represent?

Sea level is always 0!

100

x > 5

Write a number that x could equal.

x > 5 


Means x is ANY number bigger than five.

100

x + 7 = 19

Solve for x

x = 12

100

Find the mean of these numbers:


13, 7, 10, 12, 8

Mean = Add them all up and divide by how many numbers there are.


13+7+10+12+8 = 50


Divide 50 by 5.


Answer: 10

200

A grocery store sells packages of fruit. They have 8 oranges, 5 pears, 3 apples, and 2 grapefruit.


What is the ratio of apples to total fruit.

3:18

200

A dolphin dives 20 feet below sea level. A submarine is 50 feet below sea level. 


Who is further up?

The dolphin.


-20 > -50
200

x + 4 < 10


Can x = 6?

No.


 x + 4 < 10 <-- Means x + 4 is LESS THAN 10.

There has to be a line under to be equal.

200

x - 12 = 40

x = 52


Add 12 to both sides.



200

Find the median of these numbers:


1,9,4,5,10

Median:

Put the numbers in order, then cross out on both sides until there's one left:

1,4,5,9,10

Cross out 1, then 10, then 4, then 9. Answer is 5.

300

A grocery store sells packages of fruit. They have 8 oranges, 5 pears, 3 apples, and 2 grapefruit.


The grocery store has big packages of fruit. In the big packages they have 32 oranges. How many pears are in the big package?

8 oranges in the small, 32 in the large. That's x4.

So Multiply the Pears by 4. 5x4 = 20.


20 pears.

300

12 * 4 + 2

PEMDAS. Multiply, THEN ADD.


50.


300

x+ 5 > 9


Solve for x

Do the opposite to the other side.

Subtract 5 from both sides.

x < 4

300

10x = 5

x = 0.5


5 divided by 10 = 0.5

300

Find the mode of the data:


10, 12, 5, 8, 10, 16

Mode = Most often


 10 appears the most. So answer is 10.

400

You can buy 5 green onions for $20.

Find the unit price of green onions. (How much does one green onion cost?)

One green onion of costs $4. 


400

8^2 *2 -100

28


Exponents. Then times. Then subtract.

400

x < 6


Graph the inequality(Make a number line)

open circle on 6, line goes to the left.

400

14x = 42


Solve for x

x = 3

400

Find the range of the data:


5, 7, 10, 12, 18, 20

Range = Biggest number minus smallest number


20 - 5 = 15
500

You can buy five pokemon card for $5


Or you can buy a pack of 20 pokemon cards for $12.


Which is the better buy? What is the price per card?

Five cards = $1 per card

20 cards for $12 = 0.60 per card


The 20 cards is better.
500

12 + (42 + 4)

32


parenthesis first. In the parenthesis, do exponents first. Then add. Then lastly add 12 on the outside.

12+(42+4)

12+(16+4)

12+(20)

32

500

Donald has some candy. He has less than 12 pieces of candy.


Write this as an inequality.

x < 12

OR

12 > x

Alligator mouth AWAY from the x

500

x/4 = 32 solve for x

x = 128

500

Find the area of a square with a side of 5 feet.

Area = Length times width.


Square has the SAME sides. So the length and width are the same.

5x5 = 25