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Quill walks you through a problem

Say Walk me through a problem and type or say it. Quill breaks it into steps, one a page, each with a question. You answer each step before the next one shows, so you do the thinking.

say "Average speed of a train, in 3 steps. Answer each one and the next shows."
page "Step 1 of 3: Recall the speed formula" body="Average speed equals total distance divided by total time. Identify those two values in the problem."
math v = \frac{d}{t}
choose@step-train-1 "What is the speed formula?" "distance times time"|"distance divided by time"|"time divided by distance"|"distance plus time" answer="distance divided by time" why="Speed is how much distance is covered per unit of time."

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