54+8= ?
To solve this problem, we can use the technique of breaking down numbers for easier mental addition.
Step 1: We start with the expression .
Step 2: We can decompose the number 8 into two numbers that are easier to add in parts. A simple break down is .
Step 3: We substitute the breakdown into the original expression:
Thus, the expression is equivalent to , giving us the correct answer.
Therefore, the correct equivalent expression is .