Students develop efficient mental arithmetic strategies by exploring partñwhole relationships of numbers and using these to investigate strategies such as ëmake to 10í, ëdoublingí and ëcounting on from the larger numberí. The commutative property of addition is explored.
The number partner
Students are presented with a bar model to assist with addition. They are able to partition or extend numbers to use known addition facts to assist their mental computation. Addition exercises are presented to students or they can choose to create their own. The printout shows how the student solved the equation.
The number partner: go figure
This is a tutorial designed for use by the student or as a demonstration tool for the teacher. It covers information on number pairs as well as counting on from a number to work out number pairs.