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Additive Adjacent: Definitions, Examples, and Quiz

Additive adjacent refers to a mathematical concept that involves combining numbers that are next to each other in a sequence or list. This concept is often taught to students in elementary and middle school as a way to help them develop their understanding of basic arithmetic and problem-solving skills.

Definitions

There are a few key terms that are important to understand when it comes to additive adjacent:

• Adjacent: Adjacent refers to two numbers that are next to each other in a sequence or list. For example, in the sequence 2, 4, 6, 8, 10, the numbers 4 and 6 are adjacent.
• Additive: Additive refers to the process of combining two or more numbers using addition. For example, if you have the numbers 2 and 3, you can add them together to get the sum of 5.
• Additive adjacent: Additive adjacent refers to the process of combining two adjacent numbers using addition. For example, if you have the sequence 2, 4, 6, 8, 10, you could add the adjacent numbers 4 and 6 together to get a sum of 10.

Examples

Here are five examples of how you can use additive adjacent to solve problems:

1. Find the sum of a sequence of numbers: Let’s say you have the following sequence of numbers: 2, 4, 6, 8, 10. Using additive adjacent, you can find the sum of this sequence by adding each pair of adjacent numbers together. The sum would be: 2 + 4 = 6, 6 + 6 = 12, and 12 + 8 = 20. The final sum of the sequence would be 20.
2. Find the missing number in a sequence: Suppose you have the following sequence of numbers: 3, 7, ?, 15, 19. Using additive adjacent, you can find the missing number by adding the adjacent numbers 7 and 15 together and dividing the result by 2. The missing number would be 11.
3. Determine if a sequence of numbers is increasing or decreasing: By comparing the sum of adjacent numbers in a sequence, you can determine if the sequence is increasing or decreasing. For example, if you have the sequence 2, 4, 6, 8, 10 and you add the adjacent numbers together, you will get the following: 2 + 4 = 6, 4 + 6 = 10, and 6 + 8 = 14. Since the sum of the adjacent numbers is increasing, you can conclude that the sequence is also increasing.
4. Find the average of a sequence of numbers: You can use additive adjacent to find the average of a sequence of numbers by adding all of the adjacent numbers together and then dividing the result by the total number of numbers in the sequence. For example, if you have the sequence 2, 4, 6, 8, 10, you can find the average by adding the adjacent numbers together and dividing the result by 5: (2 + 4)/5 = 6/5 = 1.2, (4 + 6)/5 = 10/5 = 2, and (6 + 8)/5 = 14/5 = 2.8. The average of the sequence would be 2.