What do you call the operation that indicates two numbers will be combined together?

The operation that combines two numbers together is known as addition. Addition involves taking two or more numbers and calculating their total, producing a single sum. For instance, if you add 2 and 3, you would combine them to get 5. This operation is fundamental in mathematics and is typically denoted by the plus sign (+).

In contrast, the other operations listed serve different purposes: division separates numbers into equal parts; multiplication involves repeated addition; and subtraction indicates removing one number from another. Understanding that addition represents the act of combining is key in mathematical operations and in effectively solving various mathematical problems.