Renaming is the same thing as borrowing. If the problem was 62 - 35 you would have to rename the 2 ....12...by borrowing from the 6.which would become 5.
In your example there is no need to rename since 65 - 32 can be subtracted without borrowing.
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Math
math 7
Math that is in none of the catagories of math
math
A math concept is how you solve a math problem or the ideas. You usually have to memorize math concepts.