The break apart strategy just means that you write numbers in expanded form to add or subtract them.
Today, we learned how to use this method when subtracting. Please watch the video below for a few examples of subtracting using this strategy with and without regrouping! Just click on the image below to view the video.
I realize that this strategy seems silly because it takes longer, but we are trying to help kids really build an understanding of numbers. The 7 in the number 743 doesn't really mean 7. It means 700. Getting students to practice this way will hopefully help them develop a better understanding of the way numbers work and also the why behind regrouping.
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