Mean Average

Review: Ordering, solving equations, & averages

Ordering Real Numbers

• Convert each number to a decimal (use your calculator).

• Order by decimal place or using a numberline

• Remember, negatives further to the left on a number line are smallest. (EX: -20 is smaller than -2)

Multiple Choice

Which negative is the smallest?

• -1

• -10

• -100

• -0.1

Multiple Choice

Which negative is the smallest?

• -5

• -500

• -50

• -0.5

Multiple Choice

Which negative is the largest?

• -5

• -500

• -50

• -0.5

Match

Match the following

• Fractions

  $$\frac{1}{2}$$

• Percents

  24%

• Square Root

  $$\sqrt[]{25}$$

• Decimals

  0.02

Divide top by bottom (1÷2)

Divide by 100 (24÷100)

Type 2ND x²

Leave as is!

• Divide top by bottom (1÷2)

• Divide by 100 (24÷100)

• Type 2ND x²

• Leave as is!

Fill in the Blanks

What decimal is equivalent?

$\frac{12}{25}$

Fill in the Blanks

What decimal is equivalent?

$\sqrt[]{4.84}$

Reorder

Order the numbers below from LEAST -> Greatest

$$-3\frac{1}{4}$$ , $$-\sqrt[]{9}$$ , -3.2, $$-\pi$$

• $$-3\frac{1}{4}$$

• -3.2

• $$-\pi$$

• $$-\sqrt[]{9}$$

1

2

3

4

• 1
• 2
• 3
• 4

Multiple Select

Which values of x makes the inequality true?

x > $$\frac{32}{5}$$

Select TWO correct answers.

• $$\sqrt[]{46}$$

• 6.10

• $$\frac{80}{24}$$

• -7

• $$\frac{39}{4}$$

Mastering One-Step Equations

1. Identify the variable and its coefficient.
2. Isolate the variable by using inverse operations.

x + 4 = 10
-4 -4
x = 6

Multiple Choice

What should you do to solve this problem?

x + 5 = 12

• subtract 5 from both sides

• subtract 12 from both sides

• add 5 to both sides

Fill in the Blanks

Solve:

x + 5 = 12

Fill in the Blanks

Solve:

4x = 20

Match

Match the following

• 2x + 10

• x - 6 = 14

• x + 9 = 5

• -5x = 50

• x - 10 = 31

x = 5

x = 20

x = -4

x = -10

x = 41

• x = 5

• x = 20

• x = -4

• x = -10

• x = 41

Fill in the Blanks

12x = 66

Last Review! Calculating the Average

• Add up all the numbers in the set

• Divide the sum by the total count of numbers

• The result is the average

Ex: 1, 2, 3 -> 1 + 2 + 3 = 6 divided by 3 (because there were 3 #s) = 2.

Dropdown

What are the 2 steps for finding the mean?

Step 1: ​

Select answer

Step 2: ​

Select answer

Multiple Choice

How should you find the mean of the set of numbers below?

1, 2, 3, & 4

• Add the numbers. Divide the sum by 4

• Add the numbers. Divide the sum by 10

• Add the numbers. Divide by 2

• Multiply the numbers. Divide by 4

Fill in the Blanks

Find the mean (average):

1 + 5 + 5 + 5

Fill in the Blanks

Find the mean (average)

1, 10, 4

Fill in the Blanks

Find the mean (average)

1, 0, 5, 7, 12

(0 still counts when deciding what to divide by!)

Fill in the Blanks

Find the mean (average)

10, 100, 20, 40, 25