It was very beneficial for the children to work together as they had to explain what method they wanted to use and talked through their workings before showing the class on the board.
We have been using different methods while subtraction. We selected two numbers and wrote down the subtraction sentence. Some individuals used partitioning, others the empty number line and we also looked at complimentary addition.
Some children worked with numbers in the hundreds while others focussed on tens and units.