Add and subtract two- and three-digit numbers using place value...

Quick preparation

• add and subtract two- and three-digit numbers using place value to partition, rearrange and regroup numbers to assist in calculations without a…
• using partitioning and part-part-whole models and the inverse relationship between addition and subtraction to solve addition or subtraction…
• using physical or virtual grouped materials or diagrams to make proportional models of numbers to assist in calculations; for example, to calculate…