# Category Archives: Whole Number Computation

## Addition with Partial Sums

Dr. Powell shows how to teach the addition of two-digit addends to find a sum using the partial sums method. This video is part of the Project STAIR series.

## Subtraction with Partial Differences

Dr. Powell demonstrates how to teach subtraction using the partial differences method. This video is part of the Project STAIR series.

## Subtraction with Adding Up

Dr. Powell demonstrates how to teach subtraction using the adding up method. This video is part of the Project STAIR series.

## Multiplication with Area Model

Dr. Powell demonstrates how to teach multiplication using the area model. This video is part of the Project STAIR series.

## Multiplication with Partial Products

Dr. Powell demonstrates how to teach multiplication using the partial products strategy.

## Multiplication with Lattice Method

Dr. Powell demonstrates how to teach multiplication using the lattice method.

## Division with Partial Quotients

Dr. Sarah Powell demonstrates how to teach division using the partial quotients strategy.

## Division with Lattice Method

Dr. Powell demonstrates how to teach division using the lattice method.