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Thursday, September 20, 2012

Subtraction with Regrouping Across a Zero

          Today we have been continuing to work on subtracting with regrouping with one or more zeroes.  This is a difficult process for some fourth graders because they do not understand the concept- they just know the steps or the process.  We have worked on this skill all week and have had the conversations that when you regroup in the ten's column, you are taking 1 hundred and changing it into 10 tens. 
          Today we did another gallery walk in class solving subtraction word problems with too much information.  I just love seeing them working together and hearing their conversations while they try to figure out how to solve the problem!