When my first grade teacher was explaining a timed math test we were going to do, she said to visualize the numbers in your head so that you would know the answer to the question.
So when the test started, I went down problem by problem, 21, 48, 36... And then when there was only like one minute left in the test she asked me why I hadn't written anything yet and I told her that I was saying the answer is in my head like she told us to.
She was like oh no, but you have to write them down also and I suddenly realized those were just the instructions for how to do math in your head?
And then I frantically wrote down the answers.
