In preparation for assessment week Elm have been recapping our place value, as well as column addition and subtraction.  After smashing our 3 digit addition earlier in the week, we used base 10 to practically demonstrate and practise how we exchange and regroup our tens and ones in column subtraction.  We used a poem to remember the important rules:

More on top? No need to stop!
More on the floor? Go next door and exchange 10 more! 
Numbers the same? Zero is the game!

Using a guided exercise on the board, we beat all of the calculation challenges showing our brilliant knowledge. Next, we will apply our knowledge to conquer 3 digit column subtraction.