LO: I can problem solve with column subtraction.
Over the past week, we have gone through how to do the column subtraction with and without an exchange and how to show the exchange. Today, we have some problem solving activities to do that are all subtraction and involve column subtraction to help you remember how to layout your column subtraction and to do this in a problem solving task.
There is a reasoning question (the same for all challenges) where you need to use mathematical language to answer the question.
I have attached the mathematical language that we would use when doing column subtraction in year 3 and 4.
This is the same format as we used for addition as I wanted to give you chance to apply your column subtraction. We will explore more problem solving over the next couple of weeks.