Averages for 5th Grade: Calculating the average of 3 terms

To solve this problem, we'll follow these steps:

• Step 1: Identify the given numbers and set up the problem.
• Step 2: Calculate the sum of the numbers.
• Step 3: Divide the sum by the total count of numbers to find the average.

Now, let's work through each step:

Step 1: We have three numbers: $9$, $4$, and $8$. Our task is to find their average.

Step 2: Calculate the sum of these numbers:
$9 + 4 + 8$

First, add $9$ and $4$:
$9 + 4 = 13$

Next, add $13$ to $8$:
$13 + 8 = 21$

So, the sum of the numbers is $21$.

Step 3: Divide the sum by the number of numbers to find the average:
$\text{Average} = \frac{21}{3}$

Calculating the division:
$21 \div 3 = 7$

Thus, the average of the numbers $9$, $4$, and $8$ is $7$.

Therefore, the solution to the problem is $7$.

To solve this problem of finding the average of three numbers, follow these steps:

• Step 1: Find the sum of the numbers.
  We have the numbers 10, 15, and 5. First, calculate the sum:
  $10 + 15 + 5 = 30$.
• Step 2: Determine the number of terms.
  There are three numbers, so the number of terms is 3.
• Step 3: Calculate the average.
  Use the formula for average: $\text{Average} = \frac{\text{Sum of numbers}}{\text{Number of terms}}$.
  Plug in the sum and the number of terms:
  $\text{Average} = \frac{30}{3} = 10$.

Therefore, the average of the numbers 10, 15, and 5 is \textbf{\( 10 }\).

The average of a set of numbers is found by dividing the sum of the numbers by how many numbers there are.

Let's find the average of the numbers $20$, $0$, and $7$:

• Step 1: Calculate the sum of the numbers:
  $20 + 0 + 7 = 27$.
• Step 2: Count how many numbers there are. Here, we have 3 numbers.
• Step 3: Apply the average formula:
  $\text{Average} = \frac{27}{3}$.
• Step 4: Divide the sum by 3:
  $\frac{27}{3} = 9$.

Therefore, the average of 20, 0, and 7 is $9$.

To solve this problem, we'll follow these steps:

• Step 1: Sum the numbers.
• Step 2: Divide the sum by the total number of numbers.

Now, let's calculate:
Step 1: Add the numbers: $11 + 11 + 11 = 33$.
Step 2: Divide the sum by 3 (since there are three numbers): $\frac{33}{3} = 11$.

Therefore, the average of $11$, $11$, and $11$ is 11.

To solve this problem, we'll follow these steps:

• Step 1: Calculate the sum of the given numbers.
• Step 2: Determine how many numbers are in the set.
• Step 3: Use the average formula to find the solution.

Now, let's work through each step:
Step 1: Add the numbers together:
$17 + 4 + 12 = 33$.
Step 2: Count the numbers: There are 3 numbers.
Step 3: Calculate the average using the formula:
$\text{Average} = \frac{33}{3} = 11$

Therefore, the average of the numbers 17, 4, and 12 is $11$.

To solve this problem, we'll calculate the average of the given numbers $15$, $0$, and $0$.

• Step 1: Find the sum of the numbers.
  $\quad 15 + 0 + 0 = 15$
• Step 2: Count the number of terms.
  $\quad$ There are 3 terms in total: $15$, $0$, and $0$.
• Step 3: Calculate the average using the formula:
  $\quad \text{Average} = \frac{\text{Sum of terms}}{\text{Number of terms}} = \frac{15}{3}$
• Step 4: Perform the division.
  $\quad \frac{15}{3} = 5$

Therefore, the calculated average is $5$.

Our calculated average $5$ corresponds with the correct answer choice.

To solve this problem, we'll follow these steps:

• Step 1: Identify the given numbers: 10, 5, and 15.
• Step 2: Apply the formula for the average.
• Step 3: Perform the calculation to find the average.

Now, let's work through each step:

Step 1: We have three numbers to consider: $10$, $5$, and $15$.

Step 2: To find the average, we use the formula:

$\text{Average} = \frac{\text{Sum of the numbers}}{\text{Number of numbers}}$

Step 3: Calculate the sum of the numbers:

$10 + 5 + 15 = 30$

Step 4: Divide the sum by the number of numbers:

The number of numbers is 3, so:

$\text{Average} = \frac{30}{3} = 10$

Therefore, the average of 10, 5, and 15 is $10$.

To solve this problem, we will calculate the average of the numbers 1, 2, and 33 using the arithmetic mean formula.

The steps to find the average are as follows:

• Step 1: Calculate the sum of the numbers: $1 + 2 + 33 = 36$.
• Step 2: Count the number of terms: There are 3 terms.
• Step 3: Find the average by dividing the sum by the number of terms: $\frac{36}{3} = 12$.

Therefore, the average of the numbers 1, 2, and 33 is $12$.

This corresponds to choice 4 in the provided options.

Thus, the solution to the problem is $12$.