Final answer:
Without additional information or context, it's challenging to provide a precise answer to your question. In the context of addition, changing the order of numbers doesn't affect the result. However, if other operations like subtraction or multiplication are involved, the question involves order of operations, and grouping could be crucial.
Step-by-step explanation:
The expression you're asking about is 18 − 949 79 − 8. However, it seems like there might be some missing symbols or operations between the numbers. It's hard to determine how to group your numbers for addition without any clear operations between them.
If we interpret your question as five separate numbers that need to be added - that is, 18, -949, 79, -8 - then ordering is not crucial in addition because it follows the commutative property. This property states that changing the order of the addends does not change the final sum.
If there are supposed to be operations like subtraction or multiplication between numbers, then your question would involve order of operations, which is a fundamental concept in algebra, and grouping would be crucial to obtain the correct result.
Learn more about Order of Operations