Real-world examples of average calculation for 6th grade

📚 Quick Study Guide

• 🍎 The average (also called the mean) is found by adding up all the numbers in a set and then dividing by the number of numbers in the set.
• ➕ Formula: Average = $\frac{\text{Sum of numbers}}{\text{Number of numbers}}$
• ⏱️ Example: To find the average of 3, 7, and 8: 3 + 7 + 8 = 18. Then, 18 / 3 = 6. So, the average is 6.
• 📈 Averages help us understand data and find a typical value.
• 💡 Rounding: Sometimes you might need to round your average to the nearest whole number or decimal place.

Practice Quiz

1. What is the average of the numbers 2, 4, 6, and 8?
   1. 6
   2. 5
   3. 4
   4. 7
2. Sarah scored 75, 80, and 85 on her math tests. What is her average score?
   1. 80
   2. 78
   3. 82
   4. 85
3. A bag contains 3 red marbles, 5 blue marbles, and 4 green marbles. What is the average number of each color of marble?
   1. 4
   2. 3
   3. 5
   4. 12
4. What is the average of these temperatures (in Celsius): 20, 25, 30, 35, and 40?
   1. 30
   2. 32
   3. 35
   4. 25
5. John ran 10 miles on Monday, 8 miles on Tuesday, and 6 miles on Wednesday. What was the average number of miles he ran per day?
   1. 8
   2. 7
   3. 9
   4. 6
6. What is the average of the numbers: 12, 15, 18, 21, and 24?
   1. 18
   2. 17
   3. 19
   4. 20
7. A class has 20 students. 5 students scored 90, 10 students scored 80, and 5 students scored 70. What is the average score of the class?
   1. 80
   2. 82.5
   3. 85
   4. 77.5