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!

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

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

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