What is a prerequisite math strategy to subtraction?

Counting backwards is a foundational math strategy for subtraction because it directly relates to the concept of taking away or removing quantities. When a student subtracts a number, they can visualize it as starting from a certain number and counting down to find the result. For instance, if a student needs to solve 5 - 2, they can start at 5 and count backwards two steps to arrive at 3.

This strategy helps reinforce the understanding of subtraction as an operation involving the decrease of quantity, making it easier for students to grasp more complex subtraction problems later on. While the other strategies listed may be useful in broader contexts, counting backwards specifically targets the mechanics of subtraction, thereby establishing a solid groundwork for performing this operation effectively.