Using the comparison model, this video teaches how to approach a given 2-step problem sum on multiplication and division, and shows the detailed steps of how to solve it. More examples at http://my.homecampus.com.sg/Learn/Pri...
Question in the video:
Billy bought 5 bags of balls.
Each bag contained 40 balls.
He packed the balls into packets of 8 balls each.
How many packets did he get?