Grouping addition, also known as "associative property of addition," refers to the idea that when adding three or more numbers, the way you group them doesn't affect the sum. In mathematical terms, this is expressed as:

\[
(a + b) + c = a + (b + c)
\]

### Example:

Suppose we have the numbers 2, 3, and 4.

1. Grouping as \((2 + 3) + 4\):
   \[
   5 + 4 = 9
   \]

2. Grouping as \(2 + (3 + 4)\):
   \[
   2 + 7 = 9
   \]

In both cases, the sum is 9, demonstrating that the grouping of numbers doesn't change the result.

Would you like more details or have any questions about this concept?

Here are 5 related questions to consider:

1. How does the associative property differ from the commutative property of addition?
2. Can the associative property be applied to subtraction?
3. What is the associative property for multiplication?
4. How can understanding the associative property help in solving complex arithmetic problems?
5. Can you provide an example where using the associative property simplifies a problem?

**Tip:** When working with long addition problems, use the associative property to group numbers in a way that makes the arithmetic easier.

Understand the associative property of addition with grouping. Learn how grouping numbers in addition does not affect the sum. Explore examples and applications of the associative property in basic arithmetic. Suitable for Grades 1-3.

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