Mentor demonstrates it with marbles. Now let us try one more. Mentor gives an example of the same sort. Cecali and Mentor take a couple of turns doing that. Let us put it on paper.
Mentor shows with marbles, pointing at the corresponding parts of the formula on paper.
Cecali and Mentor take turns with this activity, solving two or three equations. Scientists have a tradition of writing equations in certain ways. Now, let me do one more marble puzzle. Calculator game Mentor shows a calculator and makes sure Cecali knows how to use it for . Let us solve a couple of equations on the calculator.