You might be confused about the Common Core, but this fourth grader isn't. Watch Savanna Burris of Meadow Homes Elementary in Concord, California breaks down the "box method" of multiplication — in ...

In this method the smaller number is partitioned (broken down into tens and units). \({27}\) is broken down into \({10}\), \({10}\) and \({7}\). The method of partitioning into tens, simplifies the ...