Learning our Doubles.

All of the groups have been learning their doubles and have been playing Doubles Bingo.  We are getting really fast at just 'knowing' our doubles now.  

Group 1 playing Doubles Bingo

Groups 2 and 3 have also been learning the doubles plus and minus 1 strategy to work out unknown facts.  This is the chart we made to explain the strategy and to remind us when we try and teach it to others in the class.