Estimating Division by Setting up Equations

The video tutorial teaches how to estimate division by setting up equations. It begins with a review of multiplication and division as inverse operations and highlights common mistakes in setting up division equations. The tutorial introduces the use of variables to express unknown numbers in division problems and explains smart rounding for estimation. Through example problems, viewers learn to apply these concepts to estimate division results effectively.

What mistake do people commonly make when setting up the equation for division?

In the example of sharing 1,155 cookies among 13 groups, how would you set up the equation?