This 10 slide Math Activ Studio flipchart for Promethean Board teaches students how to write and solve related addition and subtraction facts (inverse operations). This lesson is aligned with the Houghton Mifflin Math Series, 6.4 - 1st grade. The lesson opens with the "Problem of the Day" in which students are given a subtraction problem in which they can color in the socks and eliminate (cross-out method) to find the answer. Next, the flipchart displays the daily objective, then reviews vocab