- rounding and compensating
- place vlaue
The strategies we have learnt for subtraction are
- place value
- equal adjustment
- revesibility
We have been learning to choose the most efficient strategy for the problem and to solve the problems mentally in our head. Here are some videos of Room 7 students solving problems. You can tell that they are thinking hard...
Johanri using Equal adjustment
Jani using equal adjustment
Joshua using rounding and compensating
Mitchell using place value